rust: Initial Commit Rust 1.50.0 lang toolchain

Rust is a multi-paradigm programming language designed for performance and safety,
especially safe concurrency. Rust is syntactically similar to C++, but can guarantee
memory safety by using a borrow checker to validate references.

Signed-off-by: Donald Hoskins <grommish@gmail.com>

lang/rust/Config.in

@@ -0,0 +1,117 @@
+# Rust Language Options
+menu "Compiler Options"
+	depends on PACKAGE_rust
+
+	config RUST_DEBUG
+		bool "Enables Debugging Environment (--enable-debug)"
+		default n
+
+	config RUST_DOCS
+		bool "Build standard library documentation (--enable-docs)"
+		default n
+
+	config RUST_COMPILER_DOCS
+		bool "Build compiler documentation (--enable-compiler-docs)"
+		default n
+
+	config RUST_OPTIMIZE_TESTS
+		bool "Build tests with optimizations (--enable-optimized-tests)"
+		default n
+
+	config RUST_PARALLEL
+		bool "Build with multi-threaded support (--enable-parallel-compiler)"
+		default n
+
+	config RUST_VERBOSE_TESTS
+		bool "Enable verbose output when running tests (--enable-verbose-tests)"
+		default n
+
+	config RUST_CCACHE
+		bool "Build with ccache enabled (--enable-ccache)"
+		default n
+
+	config RUST_LLVM_STATIC
+		bool "Statically link to libstdc++ to LLVM (--enable-llvm-static-stdccp)"
+		default n
+
+	config RUST_LLVM_SHARED
+		bool "Prefer shared linking to LLVM (--enable-llvm-link-shared)"
+		default n
+
+	config RUST_CODEGEN_TESTS
+		bool "Run the src/test/codegen tests (--enable-codegen-tests)"
+		default n
+
+	config RUST_OPTION_CHECKING
+		bool "Complain about unrecognized options in this configure script (--enable-option-checking)"
+		default y
+
+	config RUST_ENABLE_NINJA
+		bool "Build LLVM using the Ninja generator (--enable-ninja)"
+		default y
+
+	config RUST_LOCKED_DEPS
+		bool "Force Cargo.lock to be up to date (--enable-locked-deps)"
+		default n
+
+	config RUST_VENDOR
+		bool "Enable usage of vendored Rust crates (--enable-vendor)"
+		default n
+
+	config RUST_SANITIZERS
+		bool "Build the sanitizer runtimes (asan, lsan, msan, tsan) (--enable-sanitizers)"
+		default n
+
+	config RUST_DIST_SRC
+		bool "When building tarballs enables building a source tarball (--enable-dist-src)"
+		default n
+
+	config RUST_CARGO_NATIVE_STATIC
+		bool "Build static native libraries in Cargo (--enable-cargo-native-static)"
+		default n
+
+	config RUST_PROFILER
+		bool "Build the profiler runtime (--enable-profiler)"
+		default n
+
+	config RUST_FULL_TOOLS
+		bool "Build all tools (--enable-full-tools)"
+		default n
+
+	config RUST_MISSING_TOOLS
+		bool "Allow failures when building tools (--enable-missing-tools)"
+		default y
+
+	config RUST_USE_LIBCXX
+		bool "Build LLVM with libc++ (--enable-use-libcxx)"
+		default n
+
+	config RUST_CONTROL_FLOW_GUARD
+		bool "Enable Control Flow Guard (--enable-control-flow-guard)"
+		default n
+
+	config RUST_OPTIMIZE_LLVM
+		bool "Build optimized LLVM (--enable-optimize-llvm)"
+		default n
+
+	config RUST_LLVM_ASSERTIONS
+		bool "Build LLVM with assertions (--enable-llvm-assertions)"
+		default n
+
+	config RUST_DEBUG_ASSERTIONS
+		bool "Build with debugging assertions (--enable-debug-assertions)"
+		default n
+
+	config RUST_LLVM_RELEASE_DEBUGINFO
+		bool "Build LLVM with debugger metadata (--enable-llvm-release-debuginfo)"
+		default n
+
+	config RUST_MANAGE_SUBMODULES
+		bool "Let the build manage the git submodules (--enable-manage-submodules)"
+		default y
+
+	config RUST_FULL_BOOTSTRAP
+		bool "Full Bootstrap - Build three compilers instead of two (--enable-full-bootstrap)"
+		default n
+
+endmenu

lang/rust/Makefile

@@ -0,0 +1,130 @@
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=rust
+PKG_VERSION:=1.50.0
+PKG_RELEASE:=1
+
+PKG_LICENSE:=Apache-2.0 MIT
+PKG_LICENSE_FILES:=LICENSE-APACHE LICENSE-MIT
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL:=https://github.com/rust-lang/rust.git
+PKG_SOURCE_DATE:=2021-02-10
+PKG_SOURCE_VERSION:=cb75ad5db02783e8b0222fee363c5f63f7e2cf5b
+PKG_MIRROR_HASH:=747c6a9f26d143e0ef95f1be4c6ac814e2d5eead1811cba797b04e71f720df02
+PKG_HOST_ONLY:=1
+
+include $(INCLUDE_DIR)/cmake.mk
+include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/download.mk
+
+HOST_BUILD_DEPENDS:=ninja/host python3/host
+PKG_BUILD_DEPENDS:=rust/host
+CMAKE_INSTALL:=1
+
+# These are environment variables that are used by other packages to
+# define where rustc/cargo are kept.
+CONFIG_HOST_SUFFIX:=$(shell cut -d"-" -f4 <<<"$(GNU_HOST_NAME)")
+RUSTC_HOST_ARCH:=$(HOST_ARCH)-unknown-linux-$(CONFIG_HOST_SUFFIX)
+RUSTC_TARGET_ARCH:=$(REAL_GNU_TARGET_NAME)
+CARGO_HOME:=$(STAGING_DIR_HOSTPKG)
+
+# Basic Configuration Args that are used across all builds.
+# Other build arguments are found in ./rustc-config.mk
+#
+# Default CONFIGURE_ARGS introduces unknown options - Use this instead
+CONFIGURE_ARGS = \
+  --host=$(RUSTC_HOST_ARCH) \
+  --build=$(RUSTC_HOST_ARCH) \
+  --target=$(RUSTC_TARGET_ARCH) \
+  --prefix=$(CARGO_HOME) \
+  --bindir=$(CARGO_HOME)/bin \
+  --libdir=$(CARGO_HOME)/lib \
+  --sysconfdir=$(CARGO_HOME)/etc \
+  --datadir=$(CARGO_HOME)/share \
+  --mandir=$(CARGO_HOME)/man \
+  --infodir=$(CARGO_HOME)/info \
+  --localstatedir=/var \
+  --release-channel=nightly \
+  --enable-lld
+
+ifeq ($(CONFIG_USE_MUSL),y)
+CONFIGURE_ARGS += \
+  --set=target.$(RUSTC_TARGET_ARCH).linker=$(TARGET_CC_NOCACHE) \
+  --set=target.$(RUSTC_TARGET_ARCH).cc=$(TARGET_CC_NOCACHE) \
+  --set=target.$(RUSTC_TARGET_ARCH).cxx=$(TARGET_CXX_NOCACHE) \
+  --set=target.$(RUSTC_TARGET_ARCH).ar=$(TARGET_AR) \
+  --set=target.$(RUSTC_TARGET_ARCH).ranlib=$(TARGET_RANLIB)
+endif
+
+# Because we override CONFIGURE_ARGS, this needs to go here.
+include ./rustc-config.mk
+
+RUST_TMP_DIR:=$(TMP_DIR)/rust-install
+RUST_INSTALL_HOST_FILE_NAME:=$(PKG_NAME)-$(PKG_VERSION)-$(RUSTC_HOST_ARCH)-install.tar.xz
+RUST_INSTALL_TARGET_FILE_NAME:=$(PKG_NAME)-$(PKG_VERSION)-$(RUSTC_TARGET_ARCH)-install.tar.xz
+
+RUST_INSTALL_UNINSTALL:=$(CARGO_HOME)/lib/rustlib/uninstall.sh
+
+RUST_INSTALL_HOST_BINARIES:=$(CURDIR)/install_binaries.sh $(RUST_TMP_DIR) $(DL_DIR)/$(RUST_INSTALL_HOST_FILE_NAME) $(CARGO_HOME)
+RUST_INSTALL_TARGET_BINARIES:=$(CURDIR)/install_binaries.sh $(RUST_TMP_DIR) $(DL_DIR)/$(RUST_INSTALL_TARGET_FILE_NAME) $(CARGO_HOME)
+
+RUST_HOST_BINARY:=$(or $(and $(wildcard $(DL_DIR)/$(RUST_INSTALL_HOST_FILE_NAME)),true),false)
+RUST_TARGET_BINARY:=$(or $(and $(wildcard $(DL_DIR)/$(RUST_INSTALL_TARGET_FILE_NAME)),true),false)
+
+# If the HOST Install doesn't exist, force building all the tools
+ifeq ($(RUST_HOST_BINARY), false)
+CONFIGURE_ARGS += \
+  --enable-full-tools
+endif
+
+define Host/Clean
+	$(call Host/Clean/Default)
+
+	[ -f $(RUST_INSTALL_UNINSTALL) ] && \
+	    $(RUST_INSTALL_UNINSTALL) || echo No Uninstall Found
+
+	rm -rf $(BUILD_DIR_HOST)/rust
+endef
+
+define Host/Prepare
+	# Allows outside packages to call $$(BUILD_DIR_HOST)/rust as the dir
+	# rather than needing the version number.
+	[ -L $(BUILD_DIR_HOST)/rust ] || \
+	   (cd $(BUILD_DIR_HOST); ln -s "$(PKG_NAME)-$(PKG_VERSION)" rust)
+
+	[ -d $(RUST_TMP_DIR) ] || \
+	   mkdir -p $(RUST_TMP_DIR)
+
+	$(call Host/Prepare/Default)
+endef
+
+ifeq ($(RUST_TARGET_BINARY),true)
+include ./rust_install.mk
+else
+include ./rust_compile.mk
+endif
+
+define Package/rust
+  SECTION:=lang
+  CATEGORY:=Languages
+  TITLE:=Rust Programming Language Compiler
+  URL:=https://www.rust-lang.org/
+  DEPENDS:=+python3 +ninja +pkg-config +libopenssl +libyaml \
+    +libyaml-cpp +libunwind +openssl-util +python3-yaml
+endef
+
+define Package/rust/description
+  Rust lang
+endef
+
+define Package/rust/config
+	source "$(SOURCE)/Config.in"
+endef
+
+$(eval $(call HostBuild))
+$(eval $(call BuildPackage,rust))

lang/rust/install_binaries.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+#
+# Rust Langauge Host Installer
+#
+TMP_DIR=$1
+RUST_INSTALL_FILE_NAME=$2
+CARGO_HOME=$3
+
+tar -C $TMP_DIR -xvJf $RUST_INSTALL_FILE_NAME
+
+cd $TMP_DIR && \
+   find -iname "*.xz" -exec tar -v -x -J -f {} ";" && \
+   find ./* -type f -name install.sh -execdir sh {} --prefix=$CARGO_HOME --disable-ldconfig \;

lang/rust/patches/00-default_dynamic_linking.patch

@@ -0,0 +1,11 @@
+--- a/compiler/rustc_target/src/spec/linux_musl_base.rs
++++ b/compiler/rustc_target/src/spec/linux_musl_base.rs
+@@ -10,7 +10,7 @@
+     base.crt_objects_fallback = Some(CrtObjectsFallback::Musl);
+
+     // These targets statically link libc by default
+-    base.crt_static_default = true;
++    base.crt_static_default = false;
+
+     base
+ }

lang/rust/patches/01-add_mips64_musl_support.patch

@@ -0,0 +1,30 @@
+--- /dev/null
++++ b/compiler/rustc_target/src/spec/mips64_openwrt_linux_musl.rs
+@@ -0,0 +1,16 @@
++use crate::spec::{Target, TargetOptions};
++
++pub fn target() -> Target {
++    let mut base = super::linux_musl_base::opts();
++    base.cpu = "mips64r2".to_string();
++    base.features = "+mips64r2,+soft-float".to_string();
++    base.max_atomic_width = Some(64);
++    Target {
++        // LLVM doesn't recognize "muslabi64" yet.
++        llvm_target: "mips64-unknown-linux-musl".to_string(),
++        pointer_width: 64,
++        data_layout: "E-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128".to_string(),
++        arch: "mips64".to_string(),
++        options: TargetOptions { endian: "big".to_string(), mcount: "_mcount".to_string(), ..base },
++    }
++}
+--- a/compiler/rustc_target/src/spec/mod.rs
++++ b/compiler/rustc_target/src/spec/mod.rs
+@@ -662,6 +662,8 @@ supported_targets! {
+     ("mipsel-sony-psp", mipsel_sony_psp),
+     ("mipsel-unknown-none", mipsel_unknown_none),
+     ("thumbv4t-none-eabi", thumbv4t_none_eabi),
++
++    ("mips64-openwrt-linux-musl", mips64_openwrt_linux_musl),
+ }
+
+ /// Everything `rustc` knows about how to compile for a specific target.

lang/rust/patches/02-add_mips_musl_support.patch

@@ -0,0 +1,29 @@
+--- /dev/null
++++ b/compiler/rustc_target/src/spec/mips_openwrt_linux_musl.rs
+@@ -0,0 +1,16 @@
++use crate::spec::{Target, TargetOptions};
++
++pub fn target() -> Target {
++    let mut base = super::linux_musl_base::opts();
++    base.cpu = "mips32r2".to_string();
++    base.features = "+mips32r2,+soft-float".to_string();
++    base.max_atomic_width = Some(32);
++    base.crt_static_default = false;
++    Target {
++        llvm_target: "mips-unknown-linux-musl".to_string(),
++        pointer_width: 32,
++        data_layout: "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64".to_string(),
++        arch: "mips".to_string(),
++        options: TargetOptions { endian: "big".to_string(), mcount: "_mcount".to_string(), ..base },
++    }
++}
+--- a/compiler/rustc_target/src/spec/mod.rs
++++ b/compiler/rustc_target/src/spec/mod.rs
+@@ -664,6 +664,7 @@ supported_targets! {
+     ("thumbv4t-none-eabi", thumbv4t_none_eabi),
+
+     ("mips64-openwrt-linux-musl", mips64_openwrt_linux_musl),
++    ("mips-openwrt-linux-musl", mips_openwrt_linux_musl),
+ }
+
+ /// Everything `rustc` knows about how to compile for a specific target.

lang/rust/patches/03-add_x86_64_musl_support.patch

@@ -0,0 +1,32 @@
+--- a/compiler/rustc_target/src/spec/mod.rs
++++ b/compiler/rustc_target/src/spec/mod.rs
+@@ -665,6 +665,7 @@ supported_targets! {
+
+     ("mips64-openwrt-linux-musl", mips64_openwrt_linux_musl),
+     ("mips-openwrt-linux-musl", mips_openwrt_linux_musl),
++    ("x86_64-openwrt-linux-musl", x86_64_openwrt_linux_musl),
+ }
+
+ /// Everything `rustc` knows about how to compile for a specific target.
+--- /dev/null
++++ b/compiler/rustc_target/src/spec/x86_64_openwrt_linux_musl.rs
+@@ -0,0 +1,19 @@
++use crate::spec::{LinkerFlavor, Target};
++
++pub fn target() -> Target {
++    let mut base = super::linux_musl_base::opts();
++    base.cpu = "x86-64".to_string();
++    base.max_atomic_width = Some(64);
++    base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-m64".to_string());
++    base.stack_probes = true;
++    base.static_position_independent_executables = true;
++
++    Target {
++        llvm_target: "x86_64-unknown-linux-musl".to_string(),
++        pointer_width: 64,
++        data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
++            .to_string(),
++        arch: "x86_64".to_string(),
++        options: base,
++    }
++}