#!/bin/sh

MAKEDEPS="cmake llvm libxml2 ninja python3"
DEPS="curl gcc libssh2 openssl"

PKG_VER=13.0.1
SOURCE=https://github.com/llvm/llvm-project/releases/download/llvmorg-$PKG_VER/clang-$PKG_VER.src.tar.xz
DESC="Systems programming language focused on safety, speed and concurrency"

ADDITIONAL="
    patches/clang/30-Enable-stack-protector-by-default-for-Alpine-Linux.patch
    patches/clang/10-add-musl-triples.patch
    "

prepare () {
    apply_patches

    # link in /usr/inlcude/llvm to include
    ln -s /usr/include/llvm include/llvm
    # (there should be a better way to do this, since tblgen does look in /include rather than /usr/include)

}

build () {
    mkdir build
	cd    build

	python_version=$(python3 -V | sed 's/.*\([0-9]\{1,\}\.[0-9]\{1,\}\)\..*/\1/')


    cmake .. -G Ninja -Wno-dev \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_C_FLAGS_RELEASE_INIT="$CFLAGS -O2" \
		-DCMAKE_CXX_FLAGS_RELEASE_INIT="$CXXFLAGS" \
		-DCMAKE_EXE_LINKER_FLAGS_RELEASE_INIT="$LDFLAGS -Wl,-z,stack-size=2097152" \
		-DCMAKE_INSTALL_PREFIX=/usr \
		-DCMAKE_VERBOSE_MAKEFILE=OFF \
		-DCLANG_VENDOR=XiLinux \
		-DLLVM_EXTERNAL_LIT=/usr/bin/lit \
		-DCLANG_BUILD_EXAMPLES=OFF \
		-DCLANG_INCLUDE_DOCS=ON \
		-DCLANG_PYTHON_BINDINGS_VERSIONS="$python_version" \
		-DLLVM_BUILD_DOCS=ON \
		-DLLVM_ENABLE_SPHINX=ON \
		-DSPHINX_WARNINGS_AS_ERRORS=OFF \
		-DCLANG_INCLUDE_TESTS=ON \
		-DCLANG_PLUGIN_SUPPORT=ON \
		-DLIBCLANG_BUILD_STATIC=ON \
		-DLLVM_ENABLE_EH=ON \
		-DLLVM_ENABLE_RTTI=ON

	ninja clang-tblgen 
	ninja
}

package () {
    DESTDIR=$PKG_DEST ninja install
}