# Description: LLVM compiler backend
# URL: https://llvm.org/
# Maintainer: CRUX System Team, core-ports at crux dot nu
# Depends on: cmake libxml2 ninja

name=llvm
version=12.0.1
release=2
source=(https://github.com/llvm/llvm-project/releases/download/llvmorg-$version/llvm-$version.src.tar.xz
	llvm-config.h
	x86-twist-shuffle-mask.patch)

build() {
	# https://reviews.llvm.org/D104903
	# https://bugs.llvm.org/show_bug.cgi?id=50823
	patch -d $name-$version.src -p2 -i $SRC/x86-twist-shuffle-mask.patch

	export CC=gcc
	export CXX=g++

	cmake -S $name-$version.src -B build -G Ninja \
		-D CMAKE_INSTALL_PREFIX=/usr \
		-D CMAKE_BUILD_TYPE=Release \
		-D CMAKE_C_FLAGS_RELEASE="$CFLAGS" \
		-D CMAKE_CXX_FLAGS_RELEASE="$CXXFLAGS" \
		-D LLVM_TARGETS_TO_BUILD='X86;AMDGPU;BPF;NVPTX' \
		-D LLVM_BINUTILS_INCDIR=/usr/include \
		-D LLVM_BUILD_LLVM_DYLIB=1 \
		-D LLVM_LINK_LLVM_DYLIB=1 \
		-D LLVM_PARALLEL_COMPILE_JOBS="${JOBS:-1}" \
		-D LLVM_INCLUDE_EXAMPLES=0 \
		-D LLVM_INCLUDE_TESTS=0 \
		-D LLVM_ENABLE_FFI=1 \
		-D LLVM_ENABLE_RTTI=1 \
		-D LLVM_ENABLE_OCAMLDOC=0 \
		-D LLVM_INSTALL_UTILS=1 \
		-Wno-dev

	cmake --build build
	DESTDIR=$PKG cmake --install build

	# multilib stub
	mv $PKG/usr/include/llvm/Config/llvm-config{,-64}.h
	install -m 0644 $SRC/llvm-config.h $PKG/usr/include/llvm/Config/

	install -d $PKG/usr/lib/bfd-plugins
	ln -s ../LLVMgold.so $PKG/usr/lib/bfd-plugins/
	ln -s ../libLTO.so $PKG/usr/lib/bfd-plugins/
}