aspect_gcc_toolchain conflicting with rules_rust

[michael-christen]

tl;dr: I can't use this hermetic gcc toolchain and rules_rust, linking rust fails to find commands like realpath and dirname. I don't understand how it's trying to find those.

Related Links:

• https://github.com/bazelbuild/rules_rust
• https://github.com/aspect-build/gcc-toolchain
  • maybe need to expose toolpaths: https://github.com/aspect-build/gcc-toolchain/blob/e2a34698bd20c7a2f771586ddfcf504330b77a97/toolchain/defs.bzl#L156, could try patching

To reproduce:

• uncomment WORSPACE registration of the toolchain
• uncomment .bazelrc toolchain resolution
• bazel build ...

ERROR: /home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rules_rust/util/process_wrapper/BUILD.bazel:31:36: Compiling Rust (without process_wrapper) bin process_wrapper (6 fi  
les) [for tool] failed: (Exit 1): process_wrapper.sh failed: error executing command (from target @rules_rust//util/process_wrapper:process_wrapper) bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/pro  
cess_wrapper/process_wrapper.sh -- ... (remaining 21 arguments skipped)                                     
                                                                                                            
Use --sandbox_debug to see verbose messages from the sandbox and retain the sandbox build root for debugging                                                                                                          
error: linking with `external/gcc_toolchain_x86_64/bin/gcc` failed: exit status: 127                                                                                                                                  
  = note: LC_ALL="C" PATH="/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/bi  
n" VSLANG="1033" "external/gcc_toolchain_x86_64/bin/gcc" "-m64" "/tmp/rustccSpiSS/symbols.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a6  
2c4dab-cgu.00.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.01.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rule  
s_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.02.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62  
c4dab-cgu.03.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.04.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules  
_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.05.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c  
4dab-cgu.06.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.07.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_  
rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.08.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4  
dab-cgu.09.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.10.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_r  
ust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.11.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4d  
ab-cgu.12.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.13.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_ru  
st/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4dab-cgu.14.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.process_wrapper.f08ac887a62c4da  
b-cgu.15.rcgu.o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper.gkf5n1p5osl7kwu.rcgu.o" "-Wl,--as-needed" "-L" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rust_linux  
_x86_64__x86_64-unknown-linux-gnu__stable_tools/rust_toolchain/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-L" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust_tinyjson" "-L" "/home/mchristen/.cache/bazel/_  
bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "/home/mchristen/.cache/bazel/_bazel_mc  
hristen/eabc9c58e7a2790b61df5bad4df6e1e8/execroot/mchristen/bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust_tinyjson/libtinyjson-4031717389.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2  
790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-6498d8891e016dca.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c  
58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libpanic_unwind-3debdee1a9058d84.rlib" "/home/mchristen/.cache/bazel/_bazel_m  
christen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libobject-8339c5bd5cbc92bf.rlib" "/home/mchristen/.cache/bazel  
/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libmemchr-160ebcebb54c11ba.rlib" "/home/mchristen/.ca  
che/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libaddr2line-95c75789f1b65e37.rlib" "/home/m  
christen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgimli-7e8094f2d6258832.rlib"   
"/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_demangle-bac978  
3ef1b45db0.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd_  
detect-a1cd87df2f2d8e76.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gn  
u/lib/libhashbrown-7fd06d468d7dba16.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unkn  
own-linux-gnu/lib/librustc_std_workspace_alloc-5ac19487656e05bf.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_t  
ools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libminiz_oxide-c7c35d32cf825c11.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux  
-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libadler-c523f1571362e70b.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unkno  
wn-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libunwind-85f17c92b770a911.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86  
_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcfg_if-598d3ba148dadcea.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x8  
6_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-a58ec2dab545caa4.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_l  
inux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-f9dda8cca149f0fc.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/externa  
l/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_std_workspace_core-7ba4c315dd7a3503.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a27  
90b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-5ac2993e19124966.rlib" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c  
58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-linux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-df2fb7f50dec519a.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil  
" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/home/mchristen/.cache/bazel/_bazel_mchristen/eabc9c58e7a2790b61df5bad4df6e1e8/external/rust_linux_x86_64__x86_64-unknown-li  
nux-gnu__stable_tools/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "bazel-out/k8-opt-exec-2B5CBBC6/bin/external/rules_rust/util/process_wrapper/process_wrapper" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now"   
"-Wl,-O1" "-Wl,--strip-debug" "-nodefaultlibs" "-ldl" "-lpthread" "-Wl,-z,relro,-z,now" "-pass-exit-codes" "-lm" "-lstdc++" "-Wl,--gc-sections" "--sysroot" "external/sysroot_x86_64" "-Bexternal/gcc_toolchain_x86_  
64/bin" "-Bexternal/sysroot_x86_64//usr/lib" "-Bexternal/sysroot_x86_64//lib64" "-Lexternal/sysroot_x86_64//lib64" "-Lexternal/sysroot_x86_64//usr/lib" "-Lexternal/sysroot_x86_64//lib/gcc/x86_64-linux/10.3.0"      
  = note: external/gcc_toolchain_x86_64/bin/gcc: line 24: realpath: command not found                       
          external/gcc_toolchain_x86_64/bin/gcc: line 24: dirname: command not found                                                                                                                                  
          external/gcc_toolchain_x86_64/bin/gcc: line 24: realpath: command not found