# Description: LLVM compiler backend
# URL: http://llvm.org/
# Maintainer: Thomas Penteker, tek at serverop dot de
# Depends on: cmake libffi libxml2 ninja
# Arch Maintainer: CRUX-ARM System Team, devel at crux-arm dot nu

name=llvm
version=13.0.0
release=1
source=(https://github.com/llvm/llvm-project/releases/download/llvmorg-$version/$name-$version.src.tar.xz)

build() {
  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='ARM' \
    -D LLVM_BUILD_LLVM_DYLIB=ON \
    -D LLVM_LINK_LLVM_DYLIB=ON \
    -D LLVM_PARALLEL_COMPILE_JOBS="${JOBS:-1}" \
    -D LLVM_INCLUDE_EXAMPLES=OFF \
    -D LLVM_INCLUDE_TESTS=OFF \
    -D LLVM_ENABLE_FFI=ON \
    -D LLVM_ENABLE_RTTI=ON \
    -D LLVM_ENABLE_OCAMLDOC=OFF \
    -D LLVM_INSTALL_UTILS=1 \
    -D LLVM_ENABLE_LIBCXX=OFF \
    -D LLVM_ENABLE_LLD="$(prt-get isinst lld >/dev/null && echo ON || echo OFF)" \
    -D LLVM_OPTIMIZED_TABLEGEN=ON \
    -Wno-dev

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

  # multilib stub
  mv $PKG/usr/include/llvm/Config/llvm-config{,-32}.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/

  /usr/bin/python3 $name-$version.src/utils/lit/setup.py build
  /usr/bin/python3 $name-$version.src/utils/lit/setup.py install --prefix=/usr --root=$PKG
  /usr/bin/python3 -m compileall -d $name-$version.src/utils/lit $PKG
  /usr/bin/python3 -O -m compileall -d $name-$version.src/utils/lit $PKG
  /usr/bin/python3 -OO -m compileall -d $name-$version.src/utils/lit $PKG
}