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{ lib, stdenv, version, fetch, cmake, python3, llvm, libcxxabi }:
let
useLLVM = stdenv.hostPlatform.useLLVM or false;
bareMetal = stdenv.hostPlatform.parsed.kernel.name == "none";
inherit (stdenv.hostPlatform) isMusl;
in
stdenv.mkDerivation {
pname = "compiler-rt";
inherit version;
src = fetch "compiler-rt" "1n48p8gjarihkws0i2bay5w9bdwyxyxxbpwyng7ba58jb30dlyq5";
nativeBuildInputs = [ cmake python3 llvm.dev ];
buildInputs = lib.optional stdenv.hostPlatform.isDarwin libcxxabi;
NIX_CFLAGS_COMPILE = [
"-DSCUDO_DEFAULT_OPTIONS=DeleteSizeMismatch=0:DeallocationTypeMismatch=0"
];
cmakeFlags = [
"-DCOMPILER_RT_OS_DIR="
"-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON"
"-DCMAKE_C_COMPILER_TARGET=${stdenv.hostPlatform.config}"
"-DCMAKE_ASM_COMPILER_TARGET=${stdenv.hostPlatform.config}"
] ++ lib.optionals (useLLVM || bareMetal || isMusl) [
"-DCOMPILER_RT_BUILD_SANITIZERS=OFF"
"-DCOMPILER_RT_BUILD_XRAY=OFF"
"-DCOMPILER_RT_BUILD_LIBFUZZER=OFF"
"-DCOMPILER_RT_BUILD_PROFILE=OFF"
] ++ lib.optionals (useLLVM || bareMetal) [
"-DCMAKE_C_COMPILER_WORKS=ON"
"-DCMAKE_CXX_COMPILER_WORKS=ON"
"-DCOMPILER_RT_BAREMETAL_BUILD=ON"
"-DCMAKE_SIZEOF_VOID_P=${toString (stdenv.hostPlatform.parsed.cpu.bits / 8)}"
] ++ lib.optionals (useLLVM) [
"-DCOMPILER_RT_BUILD_BUILTINS=ON"
"-DCMAKE_C_FLAGS=-nodefaultlibs"
#https://stackoverflow.com/questions/53633705/cmake-the-c-compiler-is-not-able-to-compile-a-simple-test-program
"-DCMAKE_TRY_COMPILE_TARGET_TYPE=STATIC_LIBRARY"
] ++ lib.optionals (bareMetal) [
"-DCOMPILER_RT_OS_DIR=baremetal"
] ++ lib.optionals (stdenv.hostPlatform.isDarwin) [
# The compiler-rt build infrastructure sniffs supported platforms on Darwin
# and finds i386;x86_64;x86_64h. We only build for x86_64, so linking fails
# when it tries to use libc++ and libc++api for i386.
"-DDARWIN_osx_ARCHS=${stdenv.hostPlatform.darwinArch}"
];
outputs = [ "out" "dev" ];
patches = [
# https://github.com/llvm/llvm-project/commit/947f9692440836dcb8d88b74b69dd379d85974ce
../../common/compiler-rt/glibc.patch
./codesign.patch # Revert compiler-rt commit that makes codesign mandatory
./gnu-install-dirs.patch
] ++ lib.optional (useLLVM) ./crtbegin-and-end.patch
++ lib.optional stdenv.hostPlatform.isMusl ./sanitizers-nongnu.patch
++ lib.optional stdenv.hostPlatform.isAarch32 ./armv7l.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) ''
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 (useLLVM) ''
ln -s $out/lib/*/clang_rt.crtbegin-*.o $out/lib/linux/crtbegin.o
ln -s $out/lib/*/clang_rt.crtend-*.o $out/lib/linux/crtend.o
ln -s $out/lib/*/clang_rt.crtbegin_shared-*.o $out/lib/linux/crtbeginS.o
ln -s $out/lib/*/clang_rt.crtend_shared-*.o $out/lib/linux/crtendS.o
'';
}
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