/
default.nix
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/
default.nix
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{ lib, stdenv, llvm_meta, version
, monorepoSrc, runCommand
, cmake, ninja, python3, xcbuild, libllvm, linuxHeaders, libxcrypt
, doFakeLibgcc ? stdenv.hostPlatform.isFreeBSD
}:
let
useLLVM = stdenv.hostPlatform.useLLVM or false;
bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
haveLibc = stdenv.cc.libc != null;
isDarwinStatic = stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isStatic;
inherit (stdenv.hostPlatform) isMusl;
baseName = "compiler-rt";
src = runCommand "${baseName}-src-${version}" {} ''
mkdir -p "$out"
cp -r ${monorepoSrc}/cmake "$out"
cp -r ${monorepoSrc}/${baseName} "$out"
'';
in
stdenv.mkDerivation {
pname = baseName + lib.optionalString (haveLibc) "-libc";
inherit version;
inherit src;
sourceRoot = "${src.name}/${baseName}";
nativeBuildInputs = [ cmake ninja python3 libllvm.dev ]
++ lib.optional stdenv.isDarwin xcbuild.xcrun;
buildInputs =
lib.optional (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.isRiscV) linuxHeaders;
env.NIX_CFLAGS_COMPILE = toString ([
"-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"
] ++ lib.optionals (!haveLibc) [
# The compiler got stricter about this, and there is a usellvm patch below
# which patches out the assert include causing an implicit definition of
# assert. It would be nicer to understand why compiler-rt thinks it should
# be able to #include <assert.h> in the first place; perhaps it's in the
# wrong, or perhaps there is a way to provide an assert.h.
"-Wno-error=implicit-function-declaration"
]);
cmakeFlags = [
"-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
"-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
"-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
] ++ lib.optionals (haveLibc && stdenv.hostPlatform.libc == "glibc") [
"-DSANITIZER_COMMON_CFLAGS=-I${libxcrypt}/include"
] ++ lib.optionals (useLLVM || bareMetal || isMusl || isDarwinStatic) [
"-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
"-DCOMPILER_RT_BUILD_XRAY=OFF"
"-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
"-DCOMPILER_RT_BUILD_MEMPROF=OFF"
"-DCOMPILER_RT_BUILD_ORC=OFF" # may be possible to build with musl if necessary
] ++ lib.optionals (useLLVM || bareMetal) [
"-DCOMPILER_RT_BUILD_PROFILE=OFF"
] ++ lib.optionals ((useLLVM && !haveLibc) || bareMetal || isDarwinStatic ) [
"-DCMAKE_CXX_COMPILER_WORKS=ON"
] ++ lib.optionals ((useLLVM && !haveLibc) || bareMetal) [
"-DCMAKE_C_COMPILER_WORKS=ON"
"-DCOMPILER_RT_BAREMETAL_BUILD=ON"
"-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
] ++ lib.optionals (useLLVM && !haveLibc) [
"-DCMAKE_C_FLAGS=-nodefaultlibs"
] ++ lib.optionals (useLLVM) [
"-DCOMPILER_RT_BUILD_BUILTINS=ON"
#https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
"-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
] ++ lib.optionals (bareMetal) [
"-DCOMPILER_RT_OS_DIR=baremetal"
] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
"-DCMAKE_LIPO=${lib.getBin stdenv.cc.bintools.bintools}/bin/${stdenv.cc.targetPrefix}lipo"
"-DDARWIN_macosx_OVERRIDE_SDK_VERSION=ON"
"-DDARWIN_osx_ARCHS=${stdenv.hostPlatform.darwinArch}"
"-DDARWIN_osx_BUILTIN_ARCHS=${stdenv.hostPlatform.darwinArch}"
# `COMPILER_RT_DEFAULT_TARGET_ONLY` does not apply to Darwin:
# https://github.com/llvm/llvm-project/blob/27ef42bec80b6c010b7b3729ed0528619521a690/compiler-rt/cmake/base-config-ix.cmake#L153
"-DCOMPILER_RT_ENABLE_IOS=OFF"
];
outputs = [ "out" "dev" ];
patches = [
./X86-support-extension.patch # Add support for i486 i586 i686 by reusing i386 config
./gnu-install-dirs.patch
# ld-wrapper dislikes `-rpath-link //nix/store`, so we normalize away the
# extra `/`.
./normalize-var.patch
# Prevent a compilation error on darwin
./darwin-targetconditionals.patch
# See: https://github.com/NixOS/nixpkgs/pull/186575
../../common/compiler-rt/darwin-plistbuddy-workaround.patch
# See: https://github.com/NixOS/nixpkgs/pull/194634#discussion_r999829893
# ../../common/compiler-rt/armv7l-15.patch
];
# TSAN requires XPC on Darwin, which we have no public/free source files for. We can depend on the Apple frameworks
# to get it, but they're unfree. Since LLVM is rather central to the stdenv, we patch out TSAN support so that Hydra
# can build this. If we didn't do it, basically the entire nixpkgs on Darwin would have an unfree dependency and we'd
# get no binary cache for the entire platform. If you really find yourself wanting the TSAN, make this controllable by
# a flag and turn the flag off during the stdenv build.
postPatch = lib.optionalString (!stdenv.isDarwin) ''
substituteInPlace cmake/builtin-config-ix.cmake \
--replace 'set(X86 i386)' 'set(X86 i386 i486 i586 i686)'
'' + lib.optionalString stdenv.isDarwin ''
substituteInPlace cmake/config-ix.cmake \
--replace 'set(COMPILER_RT_HAS_TSAN TRUE)' 'set(COMPILER_RT_HAS_TSAN FALSE)'
'' + lib.optionalString (useLLVM && !haveLibc) ''
substituteInPlace lib/builtins/int_util.c \
--replace "#include <stdlib.h>" ""
substituteInPlace lib/builtins/clear_cache.c \
--replace "#include <assert.h>" ""
substituteInPlace lib/builtins/cpu_model.c \
--replace "#include <assert.h>" ""
'';
# Hack around weird upsream RPATH bug
postInstall = lib.optionalString (stdenv.hostPlatform.isDarwin) ''
ln -s "$out/lib"/*/* "$out/lib"
'' + lib.optionalString (useLLVM && stdenv.hostPlatform.isLinux) ''
ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/crtbegin.o
ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/crtend.o
# Note the history of crt{begin,end}S in previous versions of llvm in nixpkg:
# The presence of crtbegin_shared has been added and removed; it's possible
# people have added/removed it to get it working on their platforms.
# Try each in turn for now.
ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/crtbeginS.o
ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/crtendS.o
ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/crtbeginS.o
ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/crtendS.o
'' + lib.optionalString doFakeLibgcc ''
ln -s $out/lib/freebsd/libclang_rt.builtins-*.a $out/lib/libgcc.a
'';
meta = llvm_meta // {
homepage = "https://compiler-rt.llvm.org/";
description = "Compiler runtime libraries";
mainProgram = "hwasan_symbolize";
longDescription = ''
The compiler-rt project provides highly tuned implementations of the
low-level code generator support routines like "__fixunsdfdi" and other
calls generated when a target doesn't have a short sequence of native
instructions to implement a core IR operation. It also provides
implementations of run-time libraries for dynamic testing tools such as
AddressSanitizer, ThreadSanitizer, MemorySanitizer, and DataFlowSanitizer.
'';
# "All of the code in the compiler-rt project is dual licensed under the MIT
# license and the UIUC License (a BSD-like license)":
license = with lib.licenses; [ mit ncsa ];
# compiler-rt requires a Clang stdenv on 32-bit RISC-V:
# https://reviews.llvm.org/D43106#1019077
broken = stdenv.hostPlatform.isRiscV32 && !stdenv.cc.isClang;
};
}