# Description: LLVM
# URL: http://llvm.org
# Maintainer: CRUX compat-32 Team, compat-32-ports at crux dot nu
# Depends on: libffi-32 python-32 llvm

name=llvm-32
version=6.0.0
release=2
source=(https://llvm.org/releases/$version/llvm-$version.src.tar.xz
	PR35947-export-LLVMInitializeInstCombine-as-extern-C.patch
	PR36417-DebugInfo-discard-invalid-DBG_VALUE-instructions.patch
	PR36417-fixup-for-rL326769-RegState-Debug-is-being-truncated.patch
	D44391-export-LLVM_DYLIB_COMPONENTS-in-LLVMConfig.cmake.patch
	D44420-cmake-fix-a-typo-in-llvm_config-macro.patch)

build() {
	cd llvm-$version.src

	# https://bugs.llvm.org/show_bug.cgi?id=35947
	patch -p1 -i $SRC/PR35947-export-LLVMInitializeInstCombine-as-extern-C.patch

	# https://bugs.llvm.org/show_bug.cgi?id=36417
	patch -p1 -i $SRC/PR36417-DebugInfo-discard-invalid-DBG_VALUE-instructions.patch
	patch -p1 -i $SRC/PR36417-fixup-for-rL326769-RegState-Debug-is-being-truncated.patch

	# https://reviews.llvm.org/D44391
	patch -p1 -i $SRC/D44391-export-LLVM_DYLIB_COMPONENTS-in-LLVMConfig.cmake.patch

	# https://reviews.llvm.org/D44420
	patch -p0 -i $SRC/D44420-cmake-fix-a-typo-in-llvm_config-macro.patch

	install -d build $SRC/keep
	cd build

	cmake \
		-DLLVM_ENABLE_CXX1Y=1 \
		-DLLVM_INCLUDE_EXAMPLES=0 \
		-DLLVM_ENABLE_OCAMLDOC=0 \
		-DLLVM_INCLUDE_TESTS=0 \
		-DLLVM_ENABLE_FFI=1 \
		-DLLVM_TARGETS_TO_BUILD='X86;AMDGPU;BPF' \
		-DLLVM_BUILD_LLVM_DYLIB=1 \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX=/usr \
		-DLLVM_LIBDIR_SUFFIX=32 \
		-DLLVM_TARGET=i686-pc-linux-gnu \
		-Wno-dev ..

	MAKEFLAGS="$MAKEFLAGS" make
	make DESTDIR=$PKG install

	# keep 32bit header and config
	install -t $SRC/keep $PKG/usr/bin/llvm-config $PKG/usr/include/llvm/Config/llvm-config.h

	# remove unneeded files
	rm -r $PKG/usr/{bin,include,share/opt-viewer}

	# install 32bit header and config
	install -m 0755 -D $SRC/keep/llvm-config $PKG/usr/bin/llvm-config-32
	install -m 0644 -D $SRC/keep/llvm-config.h $PKG/usr/include/llvm/Config/llvm-config-32.h
}