nixos-riscv/pkgs/llvm-epi/clang.nix

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2024-09-25 10:18:14 +02:00
{
stdenv
, llvmPackages_latest
, lib
, fetchFromGitHub
, cmake
, bash
, python3
, perl
, which
, elfutils
, libffi
, zlib
, pkg-config
, enableDebug ? false
, gitUrl ? "https://repo.hca.bsc.es/gitlab/rferrer/llvm-epi.git"
, gitBranch ? "EPI-0.7"
, gitCommit ? "479518dc58dfceb23fc90667a5d6253e429f0fc2"
}:
let
llvmPackages = llvmPackages_latest;
llvmStdenv = llvmPackages.stdenv;
# needed to set the rpath of libstdc++ for clang-tblgen
gcc = stdenv.cc;
git = rec {
version = src.shortRev;
src = builtins.fetchGit {
url = gitUrl;
ref = gitBranch;
rev = gitCommit;
};
};
source = git;
in llvmStdenv.mkDerivation rec {
pname = "clang-epi";
inherit (source) src version;
enableParallelBuilding = true;
isClang = true;
patches = if (gitBranch == "EPI-0.7") then [
./include-cstdint.patch
] else [
];
# See https://reviews.llvm.org/D135402
env.LDFLAGS = "-Wl,--undefined-version";
passthru = {
CC = "clang";
CXX = "clang++";
};
nativeBuildInputs = [
zlib
gcc.cc.lib # Required for libstdc++.so.6
];
buildInputs = [
which
bash
python3
perl
cmake
llvmPackages.lld
elfutils
libffi
pkg-config
zlib
];
# Error with -D_FORTIFY_SOURCE=2, see https://bugs.gentoo.org/636604:
# /build/source/compiler-rt/lib/tsan/dd/dd_interceptors.cpp:225:20:
# error: redefinition of 'realpath'
# Requires disabling the "fortify" set of flags, however, for performance we
# disable all:
hardeningDisable = [ "all" ];
cmakeBuildType = if enableDebug then "Debug" else "Release";
dontStrip = enableDebug;
dontUseCmakeBuildDir = true;
# Fix shebangs, /usr/bin/env doesn't exist
prePatch = ''
patchShebangs clang/utils/EPI/generate-epi-builtins-def.py
'';
# Fix the host triple, as it has changed in a newer config.guess:
# https://git.savannah.gnu.org/gitweb/?p=config.git;a=commitdiff;h=ca9bfb8cc75a2be1819d89c664a867785c96c9ba
preConfigure = ''
mkdir -p build
cd build
cmakeDir="../llvm"
cmakeFlagsArray=(
"-DLLVM_HOST_TRIPLE=${llvmStdenv.targetPlatform.config}"
"-DLLVM_DEFAULT_TARGET_TRIPLE=riscv64-unknown-linux-gnu"
"-DLLVM_TARGETS_TO_BUILD=RISCV"
"-DLLVM_BUILD_LLVM_DYLIB=ON"
"-DLLVM_LINK_LLVM_DYLIB=ON"
# Required to run clang-ast-dump and clang-tblgen during build
"-DCMAKE_BUILD_RPATH=$PWD/lib:${zlib}/lib:${gcc.cc.lib}/lib"
"-DLLVM_ENABLE_LLD=ON"
"-DCMAKE_CXX_FLAGS_DEBUG=-g -ggnu-pubnames"
"-DCMAKE_EXE_LINKER_FLAGS_DEBUG=-Wl,--gdb-index"
"-DLLVM_LIT_ARGS=-sv --xunit-xml-output=xunit.xml"
"-DLLVM_ENABLE_PROJECTS=clang;lld"
"-DLLVM_ENABLE_ASSERTIONS=ON"
"-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"
"-DCMAKE_INSTALL_BINDIR=bin"
"-DLLVM_ENABLE_ZLIB=FORCE_ON"
"-DLLVM_ENABLE_LIBXML2=OFF"
# Set the rpath to include external libraries (zlib) both on build and
# install
"-DCMAKE_INSTALL_RPATH_USE_LINK_PATH=ON"
"-DCMAKE_INSTALL_RPATH=${zlib}/lib:${gcc.cc.lib}/lib"
)
'';
}