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build llvm libunwind.a in rustbuild #85600

Merged
merged 2 commits into from
Aug 28, 2021
Merged

build llvm libunwind.a in rustbuild #85600

merged 2 commits into from
Aug 28, 2021

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12101111
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@12101111 12101111 commented May 23, 2021 •
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This PR move the building of llvm-libunwind from build script of libunwind to rustbuild, so user don't need a C compiler and recompile this C/C++ library when using build-std, and user can use codegen flags link-self-contained and cargo flag build-std-features to control the behavior of libunwind linking.

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r? @Mark-Simulacrum

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@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label May 23, 2021
@12101111 12101111 mentioned this pull request May 23, 2021
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The job x86_64-gnu-llvm-10 failed! Check out the build log: (web) (plain)
Click to see the possible cause of the failure (guessed by this bot)

I can't figure out how to bump the version of bootstrap compiler.

dist-x86_64-musl have a warning related to this PR. It seems this disjoint_capture_migration example don't link to libc somehow.

Building stage0 tool lint-docs (x86_64-unknown-linux-musl)
[RUSTC-TIMING] build_script_build test:false 1.056
[RUSTC-TIMING] build_script_build test:false 0.691
[RUSTC-TIMING] cfg_if test:false 0.034
[RUSTC-TIMING] ppv_lite86 test:false 1.045
   Compiling serde v1.0.125
[RUSTC-TIMING] build_script_build test:false 0.924
[RUSTC-TIMING] build_script_build test:false 0.940
[RUSTC-TIMING] cfg_if test:false 0.032
[RUSTC-TIMING] remove_dir_all test:false 0.047
[RUSTC-TIMING] same_file test:false 0.321
[RUSTC-TIMING] itoa test:false 0.195
[RUSTC-TIMING] libc test:false 2.066
[RUSTC-TIMING] walkdir test:false 1.887
[RUSTC-TIMING] getrandom test:false 0.991
[RUSTC-TIMING] ryu test:false 0.568
[RUSTC-TIMING] rand_core test:false 0.939
[RUSTC-TIMING] rand_chacha test:false 2.348
[RUSTC-TIMING] rand test:false 3.518
[RUSTC-TIMING] tempfile test:false 3.094
[RUSTC-TIMING] build_script_build test:false 0.340
   Compiling serde_json v1.0.59
[RUSTC-TIMING] serde test:false 4.356
   Compiling lint-docs v0.1.0 (/checkout/src/tools/lint-docs)
[RUSTC-TIMING] serde_json test:false 3.947
[RUSTC-TIMING] lint_docs test:false 4.664
[RUSTC-TIMING] lint_docs test:false 0.508
    Finished release [optimized] target(s) in 10.78s
[TIMING] ToolBuild { compiler: Compiler { stage: 0, host: TargetSelection { triple: "x86_64-unknown-linux-musl", file: None } }, target: TargetSelection { triple: "x86_64-unknown-linux-musl", file: None }, tool: "lint-docs", path: "src/tools/lint-docs", mode: ToolBootstrap, is_optional_tool: false, source_type: InTree, extra_features: [] } -- 10.792
[TIMING] LintDocs { compiler: Compiler { stage: 0, host: TargetSelection { triple: "x86_64-unknown-linux-musl", file: None } }, target: TargetSelection { triple: "x86_64-unknown-linux-musl", file: None } } -- 0.000
warning: the code example in lint `disjoint_capture_migration` in /checkout/compiler/rustc_lint_defs/src/builtin.rs failed to generate the expected output: did not find lint `disjoint_capture_migration` in output of example, got:

error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "-m64" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-Wl,--as-needed" "-nostartfiles" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/rcrt1.o" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crti.o" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crtbeginS.o" "-L" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib" "-L" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained" "lint_example.lint_example.7rcbfp3g-cgu.0.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.1.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.10.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.11.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.12.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.13.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.14.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.15.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.2.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.3.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.4.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.5.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.6.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.7.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.8.rcgu.o" "lint_example.lint_example.7rcbfp3g-cgu.9.rcgu.o" "-o" "lint_example" "lint_example.568xfhd7q7srz4da.rcgu.o" "-Wl,--gc-sections" "-static-pie" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib" "-Wl,--start-group" "-Wl,-Bstatic" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd-255f28dfcb0bb154.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libpanic_unwind-e655f02c1e593ce5.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libminiz_oxide-3c28abc16f5b2969.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libadler-d21406008f66bd4c.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libobject-b363ab5c3d32b47b.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libaddr2line-0d2c94127602a41a.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libgimli-4e4072379944e27d.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libstd_detect-d1bf15670b2e9f0a.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_demangle-307d59bbc1cbcd57.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libhashbrown-2ccd9d626b24f359.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_std_workspace_alloc-b93a07e0fb36aac4.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind-678e38b832745508.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libcfg_if-e7db062cd21c2fe5.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/liblibc-ceb74873fc703c08.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/liballoc-f7b249598c206acc.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/librustc_std_workspace_core-41dc0d64fc2e246e.rlib" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libcore-e378844bf95f8386.rlib" "-Wl,--end-group" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libcompiler_builtins-0cfb689ff349f11a.rlib" "-lunwind" "-Wl,-Bdynamic" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crtendS.o" "/checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/self-contained/crtn.o"
  = note: /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1-gcc-ext.o): in function `_Unwind_GetDataRelBase':
          UnwindLevel1-gcc-ext.c:(.text._Unwind_GetDataRelBase+0x14): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_GetDataRelBase+0x3a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_GetDataRelBase+0x5b): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1-gcc-ext.o): in function `_Unwind_GetTextRelBase':
          UnwindLevel1-gcc-ext.c:(.text._Unwind_GetTextRelBase+0x14): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_GetTextRelBase+0x3a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_GetTextRelBase+0x5b): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1-gcc-ext.o): in function `_Unwind_Backtrace':
          UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0xc4): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0xd5): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0x122): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0x138): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0x143): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0x157): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0x163): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_Backtrace+0x177): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1-gcc-ext.o): in function `_Unwind_GetIPInfo':
          UnwindLevel1-gcc-ext.c:(.text._Unwind_GetIPInfo+0x43): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text._Unwind_GetIPInfo+0x57): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1-gcc-ext.o): in function `__register_frame_info':
          UnwindLevel1-gcc-ext.c:(.text.__register_frame_info+0x2b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text.__register_frame_info+0x4a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1-gcc-ext.o): in function `__deregister_frame_info':
          UnwindLevel1-gcc-ext.c:(.text.__deregister_frame_info+0x1b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1-gcc-ext.c:(.text.__deregister_frame_info+0x2f): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `unwind_phase2':
          UnwindLevel1.c:(.text.unwind_phase2+0xec): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x10e): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x153): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x17c): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x1c5): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x1d6): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x22b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x23f): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x253): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x267): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x2b4): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x2d1): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x2e3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x2f7): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x316): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x32a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x354): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2+0x364): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `unwind_phase2_forced':
          UnwindLevel1.c:(.text.unwind_phase2_forced+0xef): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x103): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x163): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x179): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x193): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x1a7): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x207): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x229): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x248): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x25e): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x293): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x2aa): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x2bb): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x2cf): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x2f0): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x304): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x310): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text.unwind_phase2_forced+0x324): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_RaiseException':
          UnwindLevel1.c:(.text._Unwind_RaiseException+0x158): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x181): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x1ea): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x1fe): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x213): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x22a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x23b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x24f): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x26d): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x277): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x283): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x297): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x2b6): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_RaiseException+0x2ca): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_Resume':
          UnwindLevel1.c:(.text._Unwind_Resume+0x19): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_Resume+0x6c): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_Resume+0x9a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_GetLanguageSpecificData':
          UnwindLevel1.c:(.text._Unwind_GetLanguageSpecificData+0x59): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_GetLanguageSpecificData+0x6f): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_GetLanguageSpecificData+0x83): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_GetLanguageSpecificData+0x97): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_GetLanguageSpecificData+0xb3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_GetLanguageSpecificData+0xca): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_GetRegionStart':
          UnwindLevel1.c:(.text._Unwind_GetRegionStart+0x43): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_GetRegionStart+0x5a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_DeleteException':
          UnwindLevel1.c:(.text._Unwind_DeleteException+0x2b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_DeleteException+0x3f): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_SetGR':
          UnwindLevel1.c:(.text._Unwind_SetGR+0x33): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_SetGR+0x4d): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_GetIP':
          UnwindLevel1.c:(.text._Unwind_GetIP+0x33): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_GetIP+0x4c): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(UnwindLevel1.o): in function `_Unwind_SetIP':
          UnwindLevel1.c:(.text._Unwind_SetIP+0x33): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: UnwindLevel1.c:(.text._Unwind_SetIP+0x4a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::Registers_x86_64::getRegister(int) const [clone .part.0]':
          libunwind.cpp:(.text._ZNK9libunwind16Registers_x86_6411getRegisterEi.part.0+0x3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZNK9libunwind16Registers_x86_6411getRegisterEi.part.0+0x26): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::Registers_x86_64::setRegister(int, unsigned long) [clone .part.0]':
          libunwind.cpp:(.text._ZN9libunwind16Registers_x86_6411setRegisterEim.part.0+0x3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind16Registers_x86_6411setRegisterEim.part.0+0x26): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::getFloatReg(int)':
          libunwind.cpp:(.text._ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11getFloatRegEi[_ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11getFloatRegEi]+0x3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11getFloatRegEi[_ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11getFloatRegEi]+0x26): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::setFloatReg(int, double)':
          libunwind.cpp:(.text._ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11setFloatRegEid[_ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11setFloatRegEid]+0x3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11setFloatRegEid[_ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE11setFloatRegEid]+0x26): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::LocalAddressSpace::getULEB128(unsigned long&, unsigned long) [clone .part.0]':
          libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace10getULEB128ERmm.part.0+0x3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace10getULEB128ERmm.part.0+0x26): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::LocalAddressSpace::getEncodedP(unsigned long&, unsigned long, unsigned char, unsigned long) [clone .part.0]':
          libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm.part.0+0x3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm.part.0+0x26): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::getFunctionName(char*, unsigned long, unsigned long*)':
          libunwind.cpp:(.text._ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE15getFunctionNameEPcmPm[_ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE15getFunctionNameEPcmPm]+0x34): undefined reference to `dladdr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE15getFunctionNameEPcmPm[_ZN9libunwind12UnwindCursorINS_17LocalAddressSpaceENS_16Registers_x86_64EE15getFunctionNameEPcmPm]+0x7e): undefined reference to `snprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::LocalAddressSpace::getEncodedP(unsigned long&, unsigned long, unsigned char, unsigned long)':
          libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm[_ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm]+0x92): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm[_ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm]+0xbc): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm[_ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm]+0x293): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm[_ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm]+0x2b5): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm[_ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm]+0x362): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm[_ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm]+0x39b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm[_ZN9libunwind17LocalAddressSpace11getEncodedPERmmhm]+0x3b8): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_get_reg':
          libunwind.cpp:(.text.__unw_get_reg+0xba): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_get_reg+0xd3): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_set_reg':
          libunwind.cpp:(.text.__unw_set_reg+0xa3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_set_reg+0xbc): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_get_proc_info':
          libunwind.cpp:(.text.__unw_get_proc_info+0xca): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_get_proc_info+0xe1): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_resume':
          libunwind.cpp:(.text.__unw_resume+0x66): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_resume+0x7a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_get_proc_name':
          libunwind.cpp:(.text.__unw_get_proc_name+0x6d): undefined reference to `dladdr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_get_proc_name+0xaa): undefined reference to `snprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_get_proc_name+0xcb): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_get_proc_name+0xe5): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_is_signal_frame':
          libunwind.cpp:(.text.__unw_is_signal_frame+0x66): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_is_signal_frame+0x7a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::EHHeaderParser<libunwind::LocalAddressSpace>::decodeEHHdr(libunwind::LocalAddressSpace&, unsigned long, unsigned long, libunwind::EHHeaderParser<libunwind::LocalAddressSpace>::EHHeaderInfo&)':
          libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0xe): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0x370): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0x392): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0x3d1): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0x3f8): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0x441): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0x6d2): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE11decodeEHHdrERS1_mmRNS2_12EHHeaderInfoE]+0x6ef): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o):libunwind.cpp:(.text._ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm[_ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm]+0x93): more undefined references to `stderr' follow
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::DwarfFDECache<libunwind::LocalAddressSpace>::add(unsigned long, unsigned long, unsigned long, unsigned long)':
          libunwind.cpp:(.text._ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm[_ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm]+0xab): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm[_ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm]+0xbb): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm[_ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE3addEmmmm]+0xdd): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::CFI_Parser<libunwind::LocalAddressSpace>::parseCIE(libunwind::LocalAddressSpace&, unsigned long, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::CIE_Info*)':
          libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x220): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x242): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x4b9): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x4db): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x5e7): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x609): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x6e3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x705): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x74e): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x770): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x794): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x7b6): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x7d3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x7f5): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x809): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x82b): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0x9e4): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xa06): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xa93): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xab5): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xae6): undefined reference to `__assert_fail'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xaed): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xb0f): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xb23): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE8parseCIEERS1_mPNS2_8CIE_InfoE]+0xb45): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::CFI_Parser<libunwind::LocalAddressSpace>::decodeFDE(libunwind::LocalAddressSpace&, unsigned long, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::FDE_Info*, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::CIE_Info*)':
          libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x101): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x12d): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x3ab): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x611): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x63c): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x7fb): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x896): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o):libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE9decodeFDEERS1_mPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0xa2b): more undefined references to `stderr' follow
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::DwarfFDECache<libunwind::LocalAddressSpace>::findFDE(unsigned long, unsigned long)':
          libunwind.cpp:(.text._ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE7findFDEEmm[_ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE7findFDEEmm]+0x8d): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE7findFDEEmm[_ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE7findFDEEmm]+0xc3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE7findFDEEmm[_ZN9libunwind13DwarfFDECacheINS_17LocalAddressSpaceEE7findFDEEmm]+0xdb): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::CFI_Parser<libunwind::LocalAddressSpace>::findFDE(libunwind::LocalAddressSpace&, unsigned long, unsigned long, unsigned long, unsigned long, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::FDE_Info*, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::CIE_Info*)':
          libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x1ed): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x210): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x23b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x25d): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x3f3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x6ef): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x882): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE7findFDEERS1_mmmmPNS2_8FDE_InfoEPNS2_8CIE_InfoE]+0x8dd): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::EHHeaderParser<libunwind::LocalAddressSpace>::findFDE(libunwind::LocalAddressSpace&, unsigned long, unsigned long, unsigned int, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::FDE_Info*, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::CIE_Info*)':
          libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x37c): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x39e): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x400): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x42d): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x52b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x606): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x617): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x623): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0x640): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0xadf): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0xafc): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE[_ZN9libunwind14EHHeaderParserINS_17LocalAddressSpaceEE7findFDEERS1_mmjPNS_10CFI_ParserIS1_E8FDE_InfoEPNS5_8CIE_InfoE]+0xb19): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o):libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x10b): more undefined references to `stderr' follow
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::CFI_Parser<libunwind::LocalAddressSpace>::parseFDEInstructions(libunwind::LocalAddressSpace&, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::FDE_Info const&, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::CIE_Info const&, unsigned long, int, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::PrologInfo*)':
          libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x11f): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x75d): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x76e): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x923): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x945): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0xaf0): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x15a3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x15b8): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x1ccb): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2236): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x224a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x22a4): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2655): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2669): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x26c4): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x271c): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2730): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x277f): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x27a4): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2a0e): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2a3b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2b22): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o):libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2dd3): more undefined references to `stderr' follow
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::CFI_Parser<libunwind::LocalAddressSpace>::parseFDEInstructions(libunwind::LocalAddressSpace&, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::FDE_Info const&, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::CIE_Info const&, unsigned long, int, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::PrologInfo*)':
          libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2de8): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2e34): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x2e45): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x31d9): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x31ea): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3586): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3597): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x35c2): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x35d3): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x37fe): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3812): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x38c3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x38d7): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3ac9): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3ada): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3b0d): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3b22): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3b5e): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3b72): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3c23): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3c37): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3c89): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3c9a): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3e6b): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3ea4): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3edd): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3f16): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3f4f): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o):libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x3fb3): more undefined references to `stderr' follow
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::CFI_Parser<libunwind::LocalAddressSpace>::parseFDEInstructions(libunwind::LocalAddressSpace&, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::FDE_Info const&, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::CIE_Info const&, unsigned long, int, libunwind::CFI_Parser<libunwind::LocalAddressSpace>::PrologInfo*)':
          libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4036): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4056): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x408f): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x422f): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x439a): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x43b1): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x43de): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x43f6): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x446e): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4482): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4501): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4515): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4592): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x45a6): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x464a): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x465e): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x46d1): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x46e5): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x470e): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4726): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4757): undefined reference to `__assert_fail'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x479c): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x47ea): undefined reference to `__assert_fail'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4849): undefined reference to `__assert_fail'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x485c): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x48a9): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x48e8): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x491a): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x497d): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o):libunwind.cpp:(.text._ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE[_ZN9libunwind10CFI_ParserINS_17LocalAddressSpaceEE20parseFDEInstructionsERS1_RKNS2_8FDE_InfoERKNS2_8CIE_InfoEmiPNS2_10PrologInfoE]+0x4a32): more undefined references to `stderr' follow
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_init_local':
          libunwind.cpp:(.text.__unw_init_local+0x149): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::DwarfInstructions<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::evaluateExpression(unsigned long, libunwind::LocalAddressSpace&, libunwind::Registers_x86_64 const&, unsigned long)':
          libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0x135): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0x157): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0x29c): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0x632): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0xcbf): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0xcdc): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0xe5c): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o):libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE18evaluateExpressionEmRS1_RKS2_m]+0xe89): more undefined references to `stderr' follow
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `libunwind::DwarfInstructions<libunwind::LocalAddressSpace, libunwind::Registers_x86_64>::stepWithDwarf(libunwind::LocalAddressSpace&, unsigned long, unsigned long, libunwind::Registers_x86_64&, bool&)':
          libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE13stepWithDwarfERS1_mmRS2_Rb[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE13stepWithDwarfERS1_mmRS2_Rb]+0x76d): undefined reference to `fprintf'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE13stepWithDwarfERS1_mmRS2_Rb[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE13stepWithDwarfERS1_mmRS2_Rb]+0x1048): undefined reference to `__assert_fail'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text._ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE13stepWithDwarfERS1_mmRS2_Rb[_ZN9libunwind17DwarfInstructionsINS_17LocalAddressSpaceENS_16Registers_x86_64EE13stepWithDwarfERS1_mmRS2_Rb]+0x1067): undefined reference to `__assert_fail'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /checkout/obj/build/x86_64-unknown-linux-musl/stage2/lib/rustlib/x86_64-unknown-linux-musl/lib/libunwind.a(libunwind.o): in function `__unw_step':
          libunwind.cpp:(.text.__unw_step+0xc3): undefined reference to `stderr'
          /usr/local/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: libunwind.cpp:(.text.__unw_step+0xd7): undefined reference to `fprintf'
          collect2: error: ld returned 1 exit status
          


error: aborting due to previous error

@petrochenkov petrochenkov self-assigned this May 23, 2021
@petrochenkov petrochenkov added S-blocked Status: Marked as blocked ❌ on something else such as an RFC or other implementation work. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels May 23, 2021
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@jfgoog jfgoog mentioned this pull request May 27, 2021
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@12101111
What is the goal of moving libunwind build to rustbuild, in general?
To put libunwind.a to some specific directory in Rust distribution and ship it, instead of keeping it in some temporary cargo directory?

@petrochenkov petrochenkov marked this pull request as ready for review June 1, 2021 10:36
@petrochenkov petrochenkov added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-blocked Status: Marked as blocked ❌ on something else such as an RFC or other implementation work. labels Jun 1, 2021
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(Removed the draft status, it's meaningless with our waiting-on-* labels.)

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12101111 commented Jun 1, 2021

What is the goal of moving libunwind build to rustbuild, in general?
To put libunwind.a to some specific directory in Rust distribution and ship it, instead of keeping it in some temporary cargo directory?

  1. Able to link system copy of libunwind.a by -C link-self-contained=no
  2. using build-std without having a working C toolchain and building libunwind.a again.
  3. Able to assemble rust toolchain that only depend on libc.so: 1.46.0 fails to build with llvm-libunwind enabled #76020 Problem linking libunwind when compiling clippy #85751
  4. In general, just move all c/c++ dependence of std to separate file/directory

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@JohnCSimon JohnCSimon added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jun 20, 2021
@12101111 12101111 mentioned this pull request Jul 5, 2021
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@12101111 12101111 changed the title [WIP] build llvm libunwind.a in rustbuild build llvm libunwind.a in rustbuild Jul 5, 2021
@petrochenkov petrochenkov added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jul 5, 2021
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Ping from triage:
@12101111
Can you please address the failed build and merge conflicts?

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This pr is current blocked by #88227 or some other fix to deal with the linking error

@petrochenkov petrochenkov mentioned this pull request Aug 26, 2021
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@bors r+

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bors commented Aug 28, 2021

📌 Commit 9a53d59 has been approved by petrochenkov

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Aug 28, 2021
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bors commented Aug 28, 2021

⌛ Testing commit 9a53d59 with merge 926f069...

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bors commented Aug 28, 2021

☀️ Test successful - checks-actions
Approved by: petrochenkov
Pushing 926f069 to master...

@bors bors added the merged-by-bors This PR was explicitly merged by bors. label Aug 28, 2021
@bors bors merged commit 926f069 into rust-lang:master Aug 28, 2021
@rustbot rustbot added this to the 1.56.0 milestone Aug 28, 2021
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jethrogb commented Aug 30, 2021 •
edited
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Getting

rust-lld: error: unable to find library -lunwind

now when trying to build a binary using the x86_64-fortanix-unknown-sgx target with the latest nightly:

jethro@jethroft:/tmp$ cargo new hw
     Created binary (application) `hw` package
jethro@jethroft:/tmp$ cd hw
jethro@jethroft:/tmp/hw$ cargo build --target x86_64-fortanix-unknown-sgx
   Compiling hw v0.1.0 (/tmp/hw)
error: linking with `rust-lld` failed: exit status: 1
  |
  = note: "rust-lld" "-flavor" "gnu" "--version-script=/tmp/rustcxlLGsz/list" "-e" "elf_entry" "-Bstatic" "--gc-sections" "-z" "text" "-z" "norelro" "--no-undefined" "--error-unresolved-symbols" "--no-undefined-version" "-Bsymbolic" "--export-dynamic" "-u" "__rust_abort" "-u" "__rust_c_alloc" "-u" "__rust_c_dealloc" "-u" "__rust_print_err" "-u" "__rust_rwlock_rdlock" "-u" "__rust_rwlock_unlock" "-u" "__rust_rwlock_wrlock" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.12tdb1mz0a4efv0t.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.1atbcnpwf3junj.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.1od05b50dvns2als.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.230houc10p219hyr.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.2qgdb532mcvtc7eb.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.4n1jqhxhizy2ea78.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.d7pdcsjopjbz7v2.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.hzulfxaootfh3gf.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.sxikq8ukxu6m7xs.rcgu.o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9.1agu96eyzhkbpea9.rcgu.o" "--as-needed" "-L" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps" "-L" "/tmp/hw/target/debug/deps" "-L" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib" "--start-group" "-Bstatic" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libstd-4832162bb32f69e7.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libpanic_unwind-6930635acf049d15.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libdlmalloc-7d44e600bbbd2efd.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libfortanix_sgx_abi-aa28d142883d45a3.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libstd_detect-72c5f9082973e669.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_demangle-c21d6b8e985fa1dd.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libhashbrown-cac1cc1e6d81e235.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_std_workspace_alloc-7282830ce6831569.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libunwind-27363a6dd7695d0c.rlib" "-lunwind" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcfg_if-c84927296263c710.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/liblibc-08810789adeed52a.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/liballoc-58c02b303cd980b6.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_std_workspace_core-450feebab6192319.rlib" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcore-6fa5e939bd34d6d5.rlib" "--end-group" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcompiler_builtins-d20701dbc3ef38c2.rlib" "-Bdynamic" "--eh-frame-hdr" "-znoexecstack" "-L" "/home/jethro/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-fortanix-unknown-sgx/lib" "-o" "/tmp/hw/target/x86_64-fortanix-unknown-sgx/debug/deps/hw-1816fe8cf540aef9" "--gc-sections" "-pie"
  = note: rust-lld: error: unable to find library -lunwind
          

error: could not compile `hw` due to previous error
jethro@jethroft:/tmp/hw$

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Getting

rust-lld: error: unable to find library -lunwind

export RUSTFLAGS="-Clink-self-contained=yes"
> cargo build -v --target=x86_64-fortanix-unknown-sgx
   Compiling hello v0.1.0 (/tmp/hello)
     Running `rustc --crate-name hello --edition=2018 src/main.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 -C metadata=154a605a31c1b954 -C extra-filename=-154a605a31c1b954 --out-dir /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps --target x86_64-fortanix-unknown-sgx -C incremental=/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/incremental -L dependency=/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps -L dependency=/usr/obj/rust/debug/deps -Clink-self-contained=yes -Clink-args=--verbose`
INFO rustc_codegen_ssa::back::link preparing Executable to "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954"
INFO rustc_codegen_ssa::back::link "rust-lld" "-flavor" "gnu" "--version-script=/tmp/rustcdObEnP/list" "-e" "elf_entry" "-Bstatic" "--gc-sections" "-z" "text" "-z" "norelro" "--no-undefined" "--error-unresolved-symbols" "--no-undefined-version" "-Bsymbolic" "--export-dynamic" "-u" "__rust_abort" "-u" "__rust_c_alloc" "-u" "__rust_c_dealloc" "-u" "__rust_print_err" "-u" "__rust_rwlock_rdlock" "-u" "__rust_rwlock_unlock" "-u" "__rust_rwlock_wrlock" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.1aaglelihkz35t5l.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.35o406ox74id1vys.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.375tzdck7mri4la2.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.3cm6ob1qm6tldrvb.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.3jsujx36iflicqxq.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.47rk83ud24rwbrrg.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.4brhhsqfcwwq62fc.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.4xfwjgi4ij2xkby2.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.xjxs25ty31uj3rg.rcgu.o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.3nravsqtd7p9utwy.rcgu.o" "--as-needed" "-L" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps" "-L" "/usr/obj/rust/debug/deps" "-L" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib" "--start-group" "-Bstatic" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libstd-4832162bb32f69e7.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libpanic_unwind-6930635acf049d15.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libdlmalloc-7d44e600bbbd2efd.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libfortanix_sgx_abi-aa28d142883d45a3.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libstd_detect-72c5f9082973e669.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_demangle-c21d6b8e985fa1dd.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libhashbrown-cac1cc1e6d81e235.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_std_workspace_alloc-7282830ce6831569.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libunwind-27363a6dd7695d0c.rlib" "-lunwind" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcfg_if-c84927296263c710.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/liblibc-08810789adeed52a.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/liballoc-58c02b303cd980b6.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_std_workspace_core-450feebab6192319.rlib" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcore-6fa5e939bd34d6d5.rlib" "--end-group" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcompiler_builtins-d20701dbc3ef38c2.rlib" "-Bdynamic" "--eh-frame-hdr" "-znoexecstack" "-L" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib" "-L" "/home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/self-contained" "-o" "/usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954" "--gc-sections" "-pie" "--verbose"
INFO rustc_codegen_ssa::back::link linker stderr:
rust-lld: /tmp/rustcdObEnP/list
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.1aaglelihkz35t5l.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.35o406ox74id1vys.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.375tzdck7mri4la2.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.3cm6ob1qm6tldrvb.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.3jsujx36iflicqxq.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.47rk83ud24rwbrrg.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.4brhhsqfcwwq62fc.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.4xfwjgi4ij2xkby2.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.xjxs25ty31uj3rg.rcgu.o
rust-lld: /usr/obj/rust/x86_64-fortanix-unknown-sgx/debug/deps/hello-154a605a31c1b954.3nravsqtd7p9utwy.rcgu.o
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libstd-4832162bb32f69e7.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libpanic_unwind-6930635acf049d15.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libdlmalloc-7d44e600bbbd2efd.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libfortanix_sgx_abi-aa28d142883d45a3.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libstd_detect-72c5f9082973e669.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_demangle-c21d6b8e985fa1dd.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libhashbrown-cac1cc1e6d81e235.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_std_workspace_alloc-7282830ce6831569.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libunwind-27363a6dd7695d0c.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/self-contained/libunwind.a
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcfg_if-c84927296263c710.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/liblibc-08810789adeed52a.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/liballoc-58c02b303cd980b6.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/librustc_std_workspace_core-450feebab6192319.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcore-6fa5e939bd34d6d5.rlib
rust-lld: /home/han/.rustup/toolchains/nightly-x86_64-unknown-linux-musl/lib/rustlib/x86_64-fortanix-unknown-sgx/lib/libcompiler_builtins-d20701dbc3ef38c2.rlib

INFO rustc_codegen_ssa::back::link linker stdout:

    Finished dev [unoptimized + debuginfo] target(s) in 0.14s

It seems this option should be enabled for x86_64-fortanix-unknown-sgx by default, just like the wasm target:

rust/compiler/rustc_codegen_ssa/src/back/link.rs

Lines 1495 to 1508 in dbb0fe9

match sess.target.crt_objects_fallback {
// FIXME: Find a better heuristic for "native musl toolchain is available",
// based on host and linker path, for example.
// (https://github.com/rust-lang/rust/pull/71769#issuecomment-626330237).
Some(CrtObjectsFallback::Musl) => sess.crt_static(Some(crate_type)),
Some(CrtObjectsFallback::Mingw) => {
sess.host == sess.target
&& sess.target.vendor != "uwp"
&& detect_self_contained_mingw(&sess)
}
// FIXME: Figure out cases in which WASM needs to link with a native toolchain.
Some(CrtObjectsFallback::Wasm) => true,
None => false,
}

@jethrogb jethrogb mentioned this pull request Aug 30, 2021
Merged
jethrogb pushed a commit to jethrogb/rust that referenced this pull request Aug 30, 2021
Fix LLVM libunwind build for non-musl targets
446c429 
Broken in rust-lang#85600
@rylev
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rylev commented Sep 1, 2021

Somewhat surprising (to me) this change lead to a small regression in instruction counts. Given that the regressions are all quite small, I don't think we need to look into this, but I wouldn't have expected to see a regression in instruction counts from a change in how we're building libunwind.

m-ou-se added a commit to m-ou-se/rust that referenced this pull request Sep 2, 2021
@m-ou-se
Rollup merge of rust-lang#88483 - jethrogb:jb/llvm-libunwind-self-con…
89ae98f 
…tained, r=petrochenkov

Fix LLVM libunwind build for non-musl targets

Broken in rust-lang#85600. AFAICT, [only musl, mingw, and wasm](https://github.com/rust-lang/rust/blob/673d0db5e393e9c64897005b470bfeb6d5aec61b/compiler/rustc_target/src/spec/crt_objects.rs#L128-L132) should use the “self-contained” logic in rustbuild.
m-ou-se added a commit to m-ou-se/rust that referenced this pull request Sep 3, 2021
@m-ou-se
Rollup merge of rust-lang#88483 - jethrogb:jb/llvm-libunwind-self-con…
3ce205a 
…tained, r=petrochenkov

Fix LLVM libunwind build for non-musl targets

Broken in rust-lang#85600. AFAICT, [only musl, mingw, and wasm](https://github.com/rust-lang/rust/blob/673d0db5e393e9c64897005b470bfeb6d5aec61b/compiler/rustc_target/src/spec/crt_objects.rs#L128-L132) should use the “self-contained” logic in rustbuild.
messense added a commit to rust-cross/rust-musl-cross that referenced this pull request Sep 14, 2021
@messense
Pin nightly version to 2021-08-28
b6700b5 
rust-lang/rust#85600 changed libunwind building
process
@jszwedko jszwedko mentioned this pull request Oct 22, 2021
Merged
@ldm0 ldm0 mentioned this pull request Sep 10, 2022
Closed
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