From 06b84a9e3d7514ac23953ad76242710444d2a0c1 Mon Sep 17 00:00:00 2001 From: Samuel Holland Date: Sat, 21 Dec 2019 16:46:22 +0100 Subject: [PATCH 04/16] Remove -nostdlib and musl_root from musl targets --- config.toml.example | 3 --- src/bootstrap/cc_detect.rs | 27 +++----------------- src/bootstrap/compile.rs | 22 +--------------- src/bootstrap/config.rs | 7 ------ src/bootstrap/configure.py | 28 --------------------- src/bootstrap/lib.rs | 8 ------ src/bootstrap/sanity.rs | 24 ------------------ src/librustc_target/spec/linux_musl_base.rs | 16 ------------ 8 files changed, 4 insertions(+), 131 deletions(-) diff --git a/config.toml.example b/config.toml.example index 5152a6c9..1d411c5c 100644 --- a/config.toml.example +++ b/config.toml.example @@ -340,9 +340,6 @@ # nightly features #channel = "dev" -# The root location of the MUSL installation directory. -#musl-root = "..." - # By default the `rustc` executable is built with `-Wl,-rpath` flags on Unix # platforms to ensure that the compiler is usable by default from the build # directory (as it links to a number of dynamic libraries). This may not be diff --git a/src/bootstrap/cc_detect.rs b/src/bootstrap/cc_detect.rs index a4cb81d3..b4247e74 100644 --- a/src/bootstrap/cc_detect.rs +++ b/src/bootstrap/cc_detect.rs @@ -86,7 +86,7 @@ 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(); @@ -109,7 +109,7 @@ pub fn find(build: &mut Build) { cfg.compiler(cxx); true } else if build.hosts.contains(&target) || build.build == target { - set_compiler(&mut cfg, Language::CPlusPlus, target, config, build); + set_compiler(&mut cfg, Language::CPlusPlus, target, config); true } else { false @@ -136,8 +136,7 @@ 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 @@ -177,26 +176,6 @@ 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 831053bc..3e49d459 100644 --- a/src/bootstrap/compile.rs +++ b/src/bootstrap/compile.rs @@ -130,18 +130,7 @@ fn copy_third_party_objects(builder: &Builder<'_>, compiler: &Compiler, target: target_deps.push(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") { - let srcdir = builder.musl_root(target).unwrap().join("lib"); - for &obj in &["crt1.o", "crti.o", "crtn.o"] { - copy_and_stamp(&srcdir, obj); - } - } else if target.ends_with("-wasi") { + if target.ends_with("-wasi") { let srcdir = builder.wasi_root(target).unwrap().join("lib/wasm32-wasi"); copy_and_stamp(&srcdir, "crt1.o"); } @@ -227,15 +216,6 @@ pub fn std_cargo(builder: &Builder<'_>, .arg("--manifest-path") .arg(builder.src.join("src/libtest/Cargo.toml")); - // Help the libc crate compile by assisting it in finding various - // sysroot native libraries. - if target.contains("musl") { - if let Some(p) = builder.musl_root(target) { - let root = format!("native={}/lib", p.to_str().unwrap()); - cargo.rustflag("-L").rustflag(&root); - } - } - if target.ends_with("-wasi") { if let Some(p) = builder.wasi_root(target) { let root = format!("native={}/lib/wasm32-wasi", p.to_str().unwrap()); diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs index 5f2ef01b..c291d3a0 100644 --- a/src/bootstrap/config.rs +++ b/src/bootstrap/config.rs @@ -130,8 +130,6 @@ 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, @@ -166,7 +164,6 @@ pub struct Target { pub linker: Option, pub ndk: Option, pub crt_static: Option, - pub musl_root: Option, pub wasi_root: Option, pub qemu_rootfs: Option, pub no_std: bool, @@ -306,7 +303,6 @@ struct Rust { parallel_compiler: Option, default_linker: Option, channel: Option, - musl_root: Option, rpath: Option, verbose_tests: Option, optimize_tests: Option, @@ -340,7 +336,6 @@ struct TomlTarget { llvm_filecheck: Option, android_ndk: Option, crt_static: Option, - musl_root: Option, wasi_root: Option, qemu_rootfs: Option, } @@ -559,7 +554,6 @@ 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, flags.deny_warnings.or(rust.deny_warnings)); set(&mut config.backtrace_on_ice, rust.backtrace_on_ice); @@ -595,7 +589,6 @@ 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.wasi_root = cfg.wasi_root.clone().map(PathBuf::from); target.qemu_rootfs = cfg.qemu_rootfs.clone().map(PathBuf::from); diff --git a/src/bootstrap/configure.py b/src/bootstrap/configure.py index bb6041d7..73f3781c 100755 --- a/src/bootstrap/configure.py +++ b/src/bootstrap/configure.py @@ -109,34 +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-musleabi.musl-root", - "armv7-unknown-linux-musleabi install directory") -v("musl-root-armv7hf", "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("musl-root-mips64", "target.mips64-unknown-linux-muslabi64.musl-root", - "mips64-unknown-linux-muslabi64 install directory") -v("musl-root-mips64el", "target.mips64el-unknown-linux-muslabi64.musl-root", - "mips64el-unknown-linux-muslabi64 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 e9b7976d..c4203e83 100644 --- a/src/bootstrap/lib.rs +++ b/src/bootstrap/lib.rs @@ -827,14 +827,6 @@ 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 the sysroot for the wasi target, if defined fn wasi_root(&self, target: Interned) -> Option<&Path> { self.config.target_config.get(&target) diff --git a/src/bootstrap/sanity.rs b/src/bootstrap/sanity.rs index bffe748f..3b109548 100644 --- a/src/bootstrap/sanity.rs +++ b/src/bootstrap/sanity.rs @@ -187,30 +187,6 @@ 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()); - } - } - 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/librustc_target/spec/linux_musl_base.rs b/src/librustc_target/spec/linux_musl_base.rs index e294e639..58ae91a9 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. -- 2.25.0