src_name=llvm-project
git_url0=git://github.com/llvm/$src_name

src_dir=$src_dir_root/$src_name
pkg_dir=$pkgs_dir_root/$pkg_name
rm -Rf $pkg_dir
mkdir -p $pkgs_dir_root
cp -r $src_dir $pkg_dir

cd $pkg_dir

if test x$git_commit != x; then
	git checkout --force $git_commit
	git reset --hard
fi

build_dir=$builds_dir_root/$pkg_name
rm -Rf $build_dir
mkdir -p $build_dir
cd $build_dir

PATH_SAVED=$PATH
# wants sh in path
# need a c++748932478923473982743 toolchain...
export PATH="\
/nyan/toolchains/current/bin:\
/nyan/cmake/current/bin:\
/nyan/ninja/current/bin:\
/nyan/git/current/bin:\
$PATH\
"
cmake	-G Ninja \
	"-DCMAKE_C_COMPILER=gcc" \
	"-DCMAKE_C_FLAGS=-pipe -O2 -fPIC -static-libgcc -static-libstdc++ -B/nyan/glibc/current/lib -L/nyan/glibc/current/lib -Wl,-rpath-link,/nyan/glibc/current/lib -idirafter /nyan/glibc/current/include -idirafter /nyan/linux-headers/current/include" \
	"-DCMAKE_CXX_COMPILER=g++" \
	"-DCMAKE_CXX_FLAGS:STRING=-pipe -O2 -fPIC -static-libgcc -static-libstdc++ -B/nyan/glibc/current/lib -L/nyan/glibc/current/lib -Wl,-rpath-link,/nyan/glibc/current/lib -idirafter /nyan/glibc/current/include -idirafter /nyan/linux-headers/current/include" \
	-DPython3_EXECUTABLE=/nyan/python3/current/bin/python3 \
	-DCMAKE_INSTALL_PREFIX=/nyan/llvm/$slot \
	-DCMAKE_BUILD_TYPE=Release \
	-DLLVM_TARGETS_TO_BUILD=AMDGPU \
	-DLLVM_INCLUDE_TESTS=off \
	-DLLVM_ENABLE_PEDANTIC=off \
	-DLLVM_PARALLEL_COMPILE_JOBS=$threads_n \
	-DLLVM_PARALLEL_LINK_JOBS=$threads_n \
	-DLLVM_BUILD_UTILS=off \
	$pkg_dir/llvm

cmake --build . -- -j $threads_n
# ninja does not know of DESTDIR, the llvm-config does ignore the sysroot anyway and will be useless on the target machine
cmake -DCMAKE_INSTALL_PREFIX=/nyan/llvm/$slot -P ./cmake_install.cmake 

# cleanup and tidying
#--------
# since we don't use meson/gnu autotools/cmake, the config script/bin should not be of use
rm -Rf /nyan/llvm/$slot/share
rm -Rf /nyan/llvm/$slot/bin
#--------
find /nyan/llvm/$slot -type f -name '*.la' | xargs rm -f

export PATH=$PATH_SAVED
unset PATH_SAVED
rm -Rf $build_dir $pkg_dir