From d84f9863017bd4bb38c5a2063c679dc3132ecf28 Mon Sep 17 00:00:00 2001 From: Samuel Holland Date: Fri, 8 Sep 2017 22:11:14 -0500 Subject: [PATCH 05/14] Remove -nostdlib and musl_root from musl targets --- config.toml.example | 6 ---- src/bootstrap/bin/rustc.rs | 12 -------- src/bootstrap/cc_detect.rs | 27 ++---------------- src/bootstrap/compile.rs | 21 -------------- src/bootstrap/config.rs | 7 ----- src/bootstrap/configure.py | 22 --------------- src/bootstrap/lib.rs | 8 ------ src/bootstrap/sanity.rs | 28 ------------------- .../dist-i586-gnu-i586-i686-musl/Dockerfile | 2 -- src/ci/docker/dist-various-1/Dockerfile | 7 ----- src/ci/docker/dist-x86_64-musl/Dockerfile | 1 - src/librustc_target/spec/linux_musl_base.rs | 16 ----------- 12 files changed, 3 insertions(+), 154 deletions(-) diff --git a/config.toml.example b/config.toml.example index f45db37c33..50692bf74a 100644 --- a/config.toml.example +++ b/config.toml.example @@ -470,12 +470,6 @@ # only use static libraries. If unset, the target's default linkage is used. #crt-static = false -# The root location of the MUSL installation directory. The library directory -# will also need to contain libunwind.a for an unwinding implementation. Note -# that this option only makes sense for MUSL targets that produce statically -# linked binaries -#musl-root = "..." - # Used in testing for configuring where the QEMU images are located, you # probably don't want to use this. #qemu-rootfs = "..." diff --git a/src/bootstrap/bin/rustc.rs b/src/bootstrap/bin/rustc.rs index b6afe317a0..0eace41a5a 100644 --- a/src/bootstrap/bin/rustc.rs +++ b/src/bootstrap/bin/rustc.rs @@ -18,7 +18,6 @@ #![deny(warnings)] use std::env; -use std::ffi::OsString; use std::io; use std::path::PathBuf; use std::process::Command; @@ -114,17 +113,6 @@ fn main() { cmd.arg("-Cprefer-dynamic"); } - // Help the libc crate compile by assisting it in finding the MUSL - // native libraries. - if let Some(s) = env::var_os("MUSL_ROOT") { - if target.contains("musl") { - let mut root = OsString::from("native="); - root.push(&s); - root.push("/lib"); - cmd.arg("-L").arg(&root); - } - } - // Override linker if necessary. if let Ok(target_linker) = env::var("RUSTC_TARGET_LINKER") { cmd.arg(format!("-Clinker={}", target_linker)); diff --git a/src/bootstrap/cc_detect.rs b/src/bootstrap/cc_detect.rs index dfc243b705..848d1d4b2b 100644 --- a/src/bootstrap/cc_detect.rs +++ b/src/bootstrap/cc_detect.rs @@ -84,7 +84,7 @@ pub fn find(build: &mut Build) { if let Some(cc) = config.and_then(|c| c.cc.as_ref()) { cfg.compiler(cc); } else { - set_compiler(&mut cfg, Language::C, target, config, build); + set_compiler(&mut cfg, Language::C, target, config); } let compiler = cfg.get_compiler(); @@ -113,7 +113,7 @@ pub fn find(build: &mut Build) { if let Some(cxx) = config.and_then(|c| c.cxx.as_ref()) { cfg.compiler(cxx); } else { - set_compiler(&mut cfg, Language::CPlusPlus, host, config, build); + set_compiler(&mut cfg, Language::CPlusPlus, host, config); } let compiler = cfg.get_compiler(); build.verbose(&format!("CXX_{} = {:?}", host, compiler.path())); @@ -124,8 +124,7 @@ pub fn find(build: &mut Build) { fn set_compiler(cfg: &mut cc::Build, compiler: Language, target: Interned, - config: Option<&Target>, - build: &Build) { + config: Option<&Target>) { match &*target { // When compiling for android we may have the NDK configured in the // config.toml in which case we look there. Otherwise the default @@ -165,26 +164,6 @@ fn set_compiler(cfg: &mut cc::Build, } } - "mips-unknown-linux-musl" => { - if cfg.get_compiler().path().to_str() == Some("gcc") { - cfg.compiler("mips-linux-musl-gcc"); - } - } - "mipsel-unknown-linux-musl" => { - if cfg.get_compiler().path().to_str() == Some("gcc") { - cfg.compiler("mipsel-linux-musl-gcc"); - } - } - - t if t.contains("musl") => { - if let Some(root) = build.musl_root(target) { - let guess = root.join("bin/musl-gcc"); - if guess.exists() { - cfg.compiler(guess); - } - } - } - _ => {} } } diff --git a/src/bootstrap/compile.rs b/src/bootstrap/compile.rs index 249a183189..bfc62c762a 100644 --- a/src/bootstrap/compile.rs +++ b/src/bootstrap/compile.rs @@ -114,21 +114,6 @@ impl Step for Std { fn copy_third_party_objects(builder: &Builder<'_>, compiler: &Compiler, target: Interned) { let libdir = builder.sysroot_libdir(*compiler, target); - // Copies the crt(1,i,n).o startup objects - // - // Since musl supports fully static linking, we can cross link for it even - // with a glibc-targeting toolchain, given we have the appropriate startup - // files. As those shipped with glibc won't work, copy the ones provided by - // musl so we have them on linux-gnu hosts. - if target.contains("musl") { - for &obj in &["crt1.o", "crti.o", "crtn.o"] { - builder.copy( - &builder.musl_root(target).unwrap().join("lib").join(obj), - &libdir.join(obj), - ); - } - } - // Copies libunwind.a compiled to be linked wit x86_64-fortanix-unknown-sgx. // // This target needs to be linked to Fortanix's port of llvm's libunwind. @@ -182,12 +167,6 @@ pub fn std_cargo(builder: &Builder<'_>, cargo.arg("--features").arg(features) .arg("--manifest-path") .arg(builder.src.join("src/libstd/Cargo.toml")); - - if target.contains("musl") { - if let Some(p) = builder.musl_root(target) { - cargo.env("MUSL_ROOT", p); - } - } } } diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs index 7d3e584f1a..3f0113e11a 100644 --- a/src/bootstrap/config.rs +++ b/src/bootstrap/config.rs @@ -132,8 +132,6 @@ pub struct Config { pub print_step_timings: bool, pub missing_tools: bool, - // Fallback musl-root for all targets - pub musl_root: Option, pub prefix: Option, pub sysconfdir: Option, pub datadir: Option, @@ -168,7 +166,6 @@ pub struct Target { pub linker: Option, pub ndk: Option, pub crt_static: Option, - pub musl_root: Option, pub qemu_rootfs: Option, pub no_std: bool, } @@ -304,7 +301,6 @@ struct Rust { backtrace: Option, default_linker: Option, channel: Option, - musl_root: Option, rpath: Option, optimize_tests: Option, debuginfo_tests: Option, @@ -343,7 +339,6 @@ struct TomlTarget { linker: Option, android_ndk: Option, crt_static: Option, - musl_root: Option, qemu_rootfs: Option, } @@ -562,7 +557,6 @@ impl Config { set(&mut config.llvm_tools_enabled, rust.llvm_tools); config.rustc_parallel = rust.parallel_compiler.unwrap_or(false); config.rustc_default_linker = rust.default_linker.clone(); - config.musl_root = rust.musl_root.clone().map(PathBuf::from); config.save_toolstates = rust.save_toolstates.clone().map(PathBuf::from); set(&mut config.deny_warnings, rust.deny_warnings.or(flags.warnings)); set(&mut config.backtrace_on_ice, rust.backtrace_on_ice); @@ -605,7 +599,6 @@ impl Config { target.ranlib = cfg.ranlib.clone().map(PathBuf::from); target.linker = cfg.linker.clone().map(PathBuf::from); target.crt_static = cfg.crt_static.clone(); - target.musl_root = cfg.musl_root.clone().map(PathBuf::from); target.qemu_rootfs = cfg.qemu_rootfs.clone().map(PathBuf::from); config.target_config.insert(INTERNER.intern_string(triple.clone()), target); diff --git a/src/bootstrap/configure.py b/src/bootstrap/configure.py index b2d8f2d8eb..c3bb94938f 100755 --- a/src/bootstrap/configure.py +++ b/src/bootstrap/configure.py @@ -109,28 +109,6 @@ v("aarch64-linux-android-ndk", "target.aarch64-linux-android.android-ndk", "aarch64-linux-android NDK standalone path") v("x86_64-linux-android-ndk", "target.x86_64-linux-android.android-ndk", "x86_64-linux-android NDK standalone path") -v("musl-root", "target.x86_64-unknown-linux-musl.musl-root", - "MUSL root installation directory (deprecated)") -v("musl-root-x86_64", "target.x86_64-unknown-linux-musl.musl-root", - "x86_64-unknown-linux-musl install directory") -v("musl-root-i586", "target.i586-unknown-linux-musl.musl-root", - "i586-unknown-linux-musl install directory") -v("musl-root-i686", "target.i686-unknown-linux-musl.musl-root", - "i686-unknown-linux-musl install directory") -v("musl-root-arm", "target.arm-unknown-linux-musleabi.musl-root", - "arm-unknown-linux-musleabi install directory") -v("musl-root-armhf", "target.arm-unknown-linux-musleabihf.musl-root", - "arm-unknown-linux-musleabihf install directory") -v("musl-root-armv5te", "target.armv5te-unknown-linux-musleabi.musl-root", - "armv5te-unknown-linux-musleabi install directory") -v("musl-root-armv7", "target.armv7-unknown-linux-musleabihf.musl-root", - "armv7-unknown-linux-musleabihf install directory") -v("musl-root-aarch64", "target.aarch64-unknown-linux-musl.musl-root", - "aarch64-unknown-linux-musl install directory") -v("musl-root-mips", "target.mips-unknown-linux-musl.musl-root", - "mips-unknown-linux-musl install directory") -v("musl-root-mipsel", "target.mipsel-unknown-linux-musl.musl-root", - "mipsel-unknown-linux-musl install directory") v("qemu-armhf-rootfs", "target.arm-unknown-linux-gnueabihf.qemu-rootfs", "rootfs in qemu testing, you probably don't want to use this") v("qemu-aarch64-rootfs", "target.aarch64-unknown-linux-gnu.qemu-rootfs", diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs index f1e7f05aa9..4ee1444db3 100644 --- a/src/bootstrap/lib.rs +++ b/src/bootstrap/lib.rs @@ -842,14 +842,6 @@ impl Build { } } - /// Returns the "musl root" for this `target`, if defined - fn musl_root(&self, target: Interned) -> Option<&Path> { - self.config.target_config.get(&target) - .and_then(|t| t.musl_root.as_ref()) - .or(self.config.musl_root.as_ref()) - .map(|p| &**p) - } - /// Returns `true` if this is a no-std `target`, if defined fn no_std(&self, target: Interned) -> Option { self.config.target_config.get(&target) diff --git a/src/bootstrap/sanity.rs b/src/bootstrap/sanity.rs index ff4fb85bbf..ff45200bde 100644 --- a/src/bootstrap/sanity.rs +++ b/src/bootstrap/sanity.rs @@ -169,34 +169,6 @@ pub fn check(build: &mut Build) { } } - // Make sure musl-root is valid - if target.contains("musl") { - // If this is a native target (host is also musl) and no musl-root is given, - // fall back to the system toolchain in /usr before giving up - if build.musl_root(*target).is_none() && build.config.build == *target { - let target = build.config.target_config.entry(target.clone()) - .or_default(); - target.musl_root = Some("/usr".into()); - } - match build.musl_root(*target) { - Some(root) => { - if fs::metadata(root.join("lib/libc.a")).is_err() { - panic!("couldn't find libc.a in musl dir: {}", - root.join("lib").display()); - } - if fs::metadata(root.join("lib/libunwind.a")).is_err() { - panic!("couldn't find libunwind.a in musl dir: {}", - root.join("lib").display()); - } - } - None => { - panic!("when targeting MUSL either the rust.musl-root \ - option or the target.$TARGET.musl-root option must \ - be specified in config.toml") - } - } - } - if target.contains("msvc") { // There are three builds of cmake on windows: MSVC, MinGW, and // Cygwin. The Cygwin build does not have generators for Visual diff --git a/src/ci/docker/dist-i586-gnu-i586-i686-musl/Dockerfile b/src/ci/docker/dist-i586-gnu-i586-i686-musl/Dockerfile index ba2d32a929..412c37fdd1 100644 --- a/src/ci/docker/dist-i586-gnu-i586-i686-musl/Dockerfile +++ b/src/ci/docker/dist-i586-gnu-i586-i686-musl/Dockerfile @@ -30,8 +30,6 @@ COPY scripts/sccache.sh /scripts/ RUN sh /scripts/sccache.sh ENV RUST_CONFIGURE_ARGS \ - --musl-root-i586=/musl-i586 \ - --musl-root-i686=/musl-i686 \ --enable-extended \ --disable-docs diff --git a/src/ci/docker/dist-various-1/Dockerfile b/src/ci/docker/dist-various-1/Dockerfile index f80293b182..52f28df826 100644 --- a/src/ci/docker/dist-various-1/Dockerfile +++ b/src/ci/docker/dist-various-1/Dockerfile @@ -130,13 +130,6 @@ ENV CC_mipsel_unknown_linux_musl=mipsel-openwrt-linux-gcc \ CXX_thumbv7neon_unknown_linux_gnueabihf=arm-linux-gnueabihf-g++ ENV RUST_CONFIGURE_ARGS \ - --musl-root-armv5te=/musl-armv5te \ - --musl-root-arm=/musl-arm \ - --musl-root-armhf=/musl-armhf \ - --musl-root-armv7=/musl-armv7 \ - --musl-root-aarch64=/musl-aarch64 \ - --musl-root-mips=/musl-mips \ - --musl-root-mipsel=/musl-mipsel \ --enable-emscripten \ --disable-docs diff --git a/src/ci/docker/dist-x86_64-musl/Dockerfile b/src/ci/docker/dist-x86_64-musl/Dockerfile index 06f8a2fbba..f5dd379528 100644 --- a/src/ci/docker/dist-x86_64-musl/Dockerfile +++ b/src/ci/docker/dist-x86_64-musl/Dockerfile @@ -30,7 +30,6 @@ COPY scripts/sccache.sh /scripts/ RUN sh /scripts/sccache.sh ENV RUST_CONFIGURE_ARGS \ - --musl-root-x86_64=/musl-x86_64 \ --enable-extended \ --disable-docs diff --git a/src/librustc_target/spec/linux_musl_base.rs b/src/librustc_target/spec/linux_musl_base.rs index e294e63982..58ae91a96a 100644 --- a/src/librustc_target/spec/linux_musl_base.rs +++ b/src/librustc_target/spec/linux_musl_base.rs @@ -3,28 +3,12 @@ use crate::spec::{LinkerFlavor, TargetOptions}; pub fn opts() -> TargetOptions { let mut base = super::linux_base::opts(); - // Make sure that the linker/gcc really don't pull in anything, including - // default objects, libs, etc. - base.pre_link_args_crt.insert(LinkerFlavor::Gcc, Vec::new()); - base.pre_link_args_crt.get_mut(&LinkerFlavor::Gcc).unwrap().push("-nostdlib".to_string()); - // At least when this was tested, the linker would not add the // `GNU_EH_FRAME` program header to executables generated, which is required // when unwinding to locate the unwinding information. I'm not sure why this // argument is *not* necessary for normal builds, but it can't hurt! base.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap().push("-Wl,--eh-frame-hdr".to_string()); - // When generating a statically linked executable there's generally some - // small setup needed which is listed in these files. These are provided by - // a musl toolchain and are linked by default by the `musl-gcc` script. Note - // that `gcc` also does this by default, it just uses some different files. - // - // Each target directory for musl has these object files included in it so - // they'll be included from there. - base.pre_link_objects_exe_crt.push("crt1.o".to_string()); - base.pre_link_objects_exe_crt.push("crti.o".to_string()); - base.post_link_objects_crt.push("crtn.o".to_string()); - // These targets statically link libc by default base.crt_static_default = true; // These targets allow the user to choose between static and dynamic linking. -- 2.21.0