diff options
Diffstat (limited to 'debian/patches/u-allow-system-compiler-rt.patch')
| -rw-r--r-- | debian/patches/u-allow-system-compiler-rt.patch | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/debian/patches/u-allow-system-compiler-rt.patch b/debian/patches/u-allow-system-compiler-rt.patch new file mode 100644 index 000000000..3bd874a5c --- /dev/null +++ b/debian/patches/u-allow-system-compiler-rt.patch @@ -0,0 +1,327 @@ +Description: Support linking against system clang libs + Note: the above PR only covers the compiler_builtins crate, rustc itself also + needs patching as per below once that is accepted. +Forwarded: https://github.com/rust-lang-nursery/compiler-builtins/pull/296 +--- a/vendor/compiler_builtins/Cargo.toml ++++ b/vendor/compiler_builtins/Cargo.toml +@@ -43,7 +43,13 @@ + optional = true + + [features] +-c = ["cc"] ++c-vendor = ["cc"] ++ ++# Link against system clang_rt.* libraries. ++# LLVM_CONFIG or CLANG (more reliable) must be set. ++c-system = [] ++ ++c = ["c-vendor"] + compiler-builtins = [] + default = ["compiler-builtins"] + mangled-names = [] +--- a/vendor/compiler_builtins/build.rs ++++ b/vendor/compiler_builtins/build.rs +@@ -37,7 +37,7 @@ + // mangling names though we assume that we're also in test mode so we don't + // build anything and we rely on the upstream implementation of compiler-rt + // functions +- if !cfg!(feature = "mangled-names") && cfg!(feature = "c") { ++ if !cfg!(feature = "mangled-names") && cfg!(any(feature = "c-vendor", feature = "c-system")) { + // Don't use a C compiler for these targets: + // + // * wasm32 - clang 8 for wasm is somewhat hard to come by and it's +@@ -47,8 +47,10 @@ + // compiler nor is cc-rs ready for compilation to riscv (at this + // time). This can probably be removed in the future + if !target.contains("wasm32") && !target.contains("nvptx") && !target.starts_with("riscv") { +- #[cfg(feature = "c")] +- c::compile(&llvm_target); ++ #[cfg(feature = "c-vendor")] ++ c_vendor::compile(&llvm_target); ++ #[cfg(feature = "c-system")] ++ c_system::compile(&llvm_target); + } + } + +@@ -70,17 +72,14 @@ + } + } + +-#[cfg(feature = "c")] +-mod c { +- extern crate cc; +- ++#[cfg(any(feature = "c-vendor", feature = "c-system"))] ++mod sources { + use std::collections::BTreeMap; + use std::env; +- use std::path::PathBuf; + +- struct Sources { ++ pub struct Sources { + // SYMBOL -> PATH TO SOURCE +- map: BTreeMap<&'static str, &'static str>, ++ pub map: BTreeMap<&'static str, &'static str>, + } + + impl Sources { +@@ -117,39 +116,11 @@ + } + } + +- /// Compile intrinsics from the compiler-rt C source code +- pub fn compile(llvm_target: &[&str]) { ++ pub fn get_sources(llvm_target: &[&str]) -> Sources { + let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap(); + let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap(); + let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap(); + let target_vendor = env::var("CARGO_CFG_TARGET_VENDOR").unwrap(); +- let cfg = &mut cc::Build::new(); +- +- cfg.warnings(false); +- +- if target_env == "msvc" { +- // Don't pull in extra libraries on MSVC +- cfg.flag("/Zl"); +- +- // Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP +- cfg.define("__func__", Some("__FUNCTION__")); +- } else { +- // Turn off various features of gcc and such, mostly copying +- // compiler-rt's build system already +- cfg.flag("-fno-builtin"); +- cfg.flag("-fvisibility=hidden"); +- cfg.flag("-ffreestanding"); +- // Avoid the following warning appearing once **per file**: +- // clang: warning: optimization flag '-fomit-frame-pointer' is not supported for target 'armv7' [-Wignored-optimization-argument] +- // +- // Note that compiler-rt's build system also checks +- // +- // `check_cxx_compiler_flag(-fomit-frame-pointer COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG)` +- // +- // in https://github.com/rust-lang/compiler-rt/blob/c8fbcb3/cmake/config-ix.cmake#L19. +- cfg.flag_if_supported("-fomit-frame-pointer"); +- cfg.define("VISIBILITY_HIDDEN", None); +- } + + let mut sources = Sources::new(); + sources.extend(&[ +@@ -411,6 +382,48 @@ + sources.remove(&["__aeabi_cdcmp", "__aeabi_cfcmp"]); + } + ++ sources ++ } ++} ++ ++#[cfg(feature = "c-vendor")] ++mod c_vendor { ++ extern crate cc; ++ ++ use std::env; ++ use std::path::PathBuf; ++ use sources; ++ ++ /// Compile intrinsics from the compiler-rt C source code ++ pub fn compile(llvm_target: &[&str]) { ++ let target_env = env::var("CARGO_CFG_TARGET_ENV").unwrap(); ++ let cfg = &mut cc::Build::new(); ++ cfg.warnings(false); ++ ++ if target_env == "msvc" { ++ // Don't pull in extra libraries on MSVC ++ cfg.flag("/Zl"); ++ ++ // Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP ++ cfg.define("__func__", Some("__FUNCTION__")); ++ } else { ++ // Turn off various features of gcc and such, mostly copying ++ // compiler-rt's build system already ++ cfg.flag("-fno-builtin"); ++ cfg.flag("-fvisibility=hidden"); ++ cfg.flag("-ffreestanding"); ++ // Avoid the following warning appearing once **per file**: ++ // clang: warning: optimization flag '-fomit-frame-pointer' is not supported for target 'armv7' [-Wignored-optimization-argument] ++ // ++ // Note that compiler-rt's build system also checks ++ // ++ // `check_cxx_compiler_flag(-fomit-frame-pointer COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG)` ++ // ++ // in https://github.com/rust-lang/compiler-rt/blob/c8fbcb3/cmake/config-ix.cmake#L19. ++ cfg.flag_if_supported("-fomit-frame-pointer"); ++ cfg.define("VISIBILITY_HIDDEN", None); ++ } ++ + // When compiling the C code we require the user to tell us where the + // source code is, and this is largely done so when we're compiling as + // part of rust-lang/rust we can use the same llvm-project repository as +@@ -423,6 +436,7 @@ + panic!("RUST_COMPILER_RT_ROOT={} does not exist", root.display()); + } + ++ let sources = sources::get_sources(llvm_target); + let src_dir = root.join("lib/builtins"); + for (sym, src) in sources.map.iter() { + let src = src_dir.join(src); +@@ -434,3 +448,103 @@ + cfg.compile("libcompiler-rt.a"); + } + } ++ ++#[cfg(feature = "c-system")] ++mod c_system { ++ use std::env; ++ use std::process::{Command, Output}; ++ use std::str; ++ use std::path::Path; ++ use sources; ++ ++ fn success_output(err: &str, cmd: &mut Command) -> Output { ++ let output = cmd.output().expect(err); ++ let status = output.status; ++ if !status.success() { ++ panic!("{}: {:?}", err, status.code()); ++ } ++ output ++ } ++ ++ // This can be obtained by adding the line: ++ // message(STATUS "All builtin supported architectures: ${ALL_BUILTIN_SUPPORTED_ARCH}") ++ // to the bottom of compiler-rt/cmake/builtin-config-ix.cmake, then running ++ // cmake and looking at the output. ++ const ALL_SUPPORTED_ARCHES : &'static str = "i386;x86_64;arm;armhf;armv6m;armv7m;armv7em;armv7;armv7s;armv7k;aarch64;hexagon;mips;mipsel;mips64;mips64el;powerpc64;powerpc64le;riscv32;riscv64;wasm32;wasm64"; ++ ++ // This function recreates the logic of getArchNameForCompilerRTLib, ++ // defined in clang/lib/Driver/ToolChain.cpp. ++ fn get_arch_name_for_compiler_rtlib() -> String { ++ let target = env::var("TARGET").unwrap(); ++ let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap(); ++ let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap(); ++ let r = match target_arch.as_str() { ++ "arm" => if target.ends_with("eabihf") && target_os != "windows" { ++ "armhf" ++ } else { ++ "arm" ++ }, ++ "x86" => if target_os == "android" { ++ "i686" ++ } else { ++ "i386" ++ }, ++ _ => target_arch.as_str(), ++ }; ++ r.to_string() ++ } ++ ++ /// Link against system clang runtime libraries ++ pub fn compile(llvm_target: &[&str]) { ++ let target = env::var("TARGET").unwrap(); ++ let target_os = env::var("CARGO_CFG_TARGET_OS").unwrap(); ++ let compiler_rt_arch = get_arch_name_for_compiler_rtlib(); ++ ++ if ALL_SUPPORTED_ARCHES.split(";").find(|x| *x == compiler_rt_arch) == None { ++ return; ++ } ++ ++ if let Ok(clang) = env::var("CLANG") { ++ let output = success_output( ++ "failed to find clang's compiler-rt", ++ Command::new(clang) ++ .arg(format!("--target={}", target)) ++ .arg("--rtlib=compiler-rt") ++ .arg("--print-libgcc-file-name"), ++ ); ++ let fullpath = Path::new(str::from_utf8(&output.stdout).unwrap()); ++ let libpath = fullpath.parent().unwrap().display(); ++ let libname = fullpath ++ .file_stem() ++ .unwrap() ++ .to_str() ++ .unwrap() ++ .trim_start_matches("lib"); ++ println!("cargo:rustc-link-search=native={}", libpath); ++ println!("cargo:rustc-link-lib=static={}", libname); ++ } else if let Ok(llvm_config) = env::var("LLVM_CONFIG") { ++ // fallback if clang is not installed ++ let (subpath, libname) = match target_os.as_str() { ++ "linux" => ("linux", format!("clang_rt.builtins-{}", &compiler_rt_arch)), ++ "macos" => ("darwin", "clang_rt.builtins_osx_dynamic".to_string()), ++ _ => panic!("unsupported target os: {}", target_os), ++ }; ++ let cmd = format!("ls -1d $({} --libdir)/clang/*/lib/{}", llvm_config, subpath); ++ let output = success_output( ++ "failed to find clang's lib dir", ++ Command::new("sh").args(&["-ec", &cmd]), ++ ); ++ for search_dir in str::from_utf8(&output.stdout).unwrap().lines() { ++ println!("cargo:rustc-link-search=native={}", search_dir); ++ } ++ println!("cargo:rustc-link-lib=static={}", libname); ++ } else { ++ panic!("neither CLANG nor LLVM_CONFIG could be read"); ++ } ++ ++ let sources = sources::get_sources(llvm_target); ++ for (sym, _src) in sources.map.iter() { ++ println!("cargo:rustc-cfg={}=\"optimized-c\"", sym); ++ } ++ } ++} +--- a/src/bootstrap/compile.rs ++++ b/src/bootstrap/compile.rs +@@ -213,6 +213,7 @@ + emscripten: false, + }); + cargo.env("LLVM_CONFIG", llvm_config); ++ cargo.env("RUSTC_BUILD_SANITIZERS", "1"); + } + + cargo.arg("--features").arg(features) +--- a/src/librustc_asan/build.rs ++++ b/src/librustc_asan/build.rs +@@ -4,6 +4,9 @@ + use cmake::Config; + + fn main() { ++ if env::var("RUSTC_BUILD_SANITIZERS") != Ok("1".to_string()) { ++ return; ++ } + if let Some(llvm_config) = env::var_os("LLVM_CONFIG") { + build_helper::restore_library_path(); + +--- a/src/librustc_lsan/build.rs ++++ b/src/librustc_lsan/build.rs +@@ -4,6 +4,9 @@ + use cmake::Config; + + fn main() { ++ if env::var("RUSTC_BUILD_SANITIZERS") != Ok("1".to_string()) { ++ return; ++ } + if let Some(llvm_config) = env::var_os("LLVM_CONFIG") { + build_helper::restore_library_path(); + +--- a/src/librustc_msan/build.rs ++++ b/src/librustc_msan/build.rs +@@ -4,6 +4,9 @@ + use cmake::Config; + + fn main() { ++ if env::var("RUSTC_BUILD_SANITIZERS") != Ok("1".to_string()) { ++ return; ++ } + if let Some(llvm_config) = env::var_os("LLVM_CONFIG") { + build_helper::restore_library_path(); + +--- a/src/librustc_tsan/build.rs ++++ b/src/librustc_tsan/build.rs +@@ -4,6 +4,9 @@ + use cmake::Config; + + fn main() { ++ if env::var("RUSTC_BUILD_SANITIZERS") != Ok("1".to_string()) { ++ return; ++ } + if let Some(llvm_config) = env::var_os("LLVM_CONFIG") { + build_helper::restore_library_path(); + |