# Contributor: psykose <alice@ayaya.dev>
# Contributor: Alex Yam <alex@alexyam.com>
# Maintainer: psykose <alice@ayaya.dev>
pkgname=wasi-libcxx
# match llvm version
pkgver=15.0.7
_llvmver="${pkgver%%.*}"
_wasi_sdk_ver=19
pkgrel=1
pkgdesc="WASI LLVM C++ standard library"
subpackages="wasi-libcxxabi:_libcxxabi"
url="https://libcxx.llvm.org/"
arch="all"
license="Apache-2.0 WITH LLVM-exception"
makedepends="
	clang
	cmake
	libxml2-dev
	llvm$_llvmver-dev
	llvm$_llvmver-static
	python3-dev
	samurai
	wasi-libc
	zlib-dev
	"
source="
	https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver/llvm-project-$pkgver.src.tar.xz
	https://github.com/WebAssembly/wasi-sdk/archive/refs/tags/wasi-sdk-$_wasi_sdk_ver.tar.gz
	"
builddir="$srcdir"/llvm-project-$pkgver.src
# TODO: check, needs to somehow pass wasi sysroot include to lit..
options="!check"

prepare() {
	default_prepare

	mv "$srcdir"/wasi-sdk-wasi-sdk-$_wasi_sdk_ver/wasi-sdk.cmake "$builddir"
	mv "$srcdir"/wasi-sdk-wasi-sdk-$_wasi_sdk_ver/cmake/Platform cmake
}

build() {
	export CFLAGS="$CFLAGS -fno-exceptions --sysroot=/usr/share/wasi-sysroot"
	export CXXFLAGS="$CXXFLAGS -fno-exceptions --sysroot=/usr/share/wasi-sysroot"

	cmake -B build -G Ninja -S runtimes -Wno-dev \
		-DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" \
		-DCMAKE_BUILD_TYPE=MinSizeRel \
		-DCMAKE_MODULE_PATH="$builddir"/cmake \
		-DCMAKE_TOOLCHAIN_FILE="$builddir"/wasi-sdk.cmake \
		-DCMAKE_C_COMPILER_WORKS=ON \
		-DCMAKE_CXX_COMPILER_WORKS=ON \
		-DCMAKE_STAGING_PREFIX=/usr/share/wasi-sysroot \
		-DCXX_SUPPORTS_CXX11=ON \
		-DLIBCXX_ABI_VERSION=2 \
		-DLIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY=OFF \
		-DLIBCXX_CXX_ABI=libcxxabi \
		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=libcxxabi/include \
		-DLIBCXX_ENABLE_EXCEPTIONS=OFF \
		-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF \
		-DLIBCXX_ENABLE_FILESYSTEM=OFF \
		-DLIBCXX_ENABLE_SHARED=OFF \
		-DLIBCXX_ENABLE_THREADS=OFF \
		-DLIBCXX_HAS_EXTERNAL_THREAD_API=OFF \
		-DLIBCXX_HAS_MUSL_LIBC=ON \
		-DLIBCXX_HAS_PTHREAD_API=OFF \
		-DLIBCXX_HAS_WIN32_THREAD_API=OFF \
		-DLIBCXX_INCLUDE_TESTS="$(want_check && echo ON || echo OFF)" \
		-DLIBCXX_LIBDIR_SUFFIX=/wasm32-wasi \
		-DLIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY=OFF \
		-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF \
		-DLIBCXXABI_ENABLE_PIC=OFF \
		-DLIBCXXABI_ENABLE_SHARED=OFF \
		-DLIBCXXABI_ENABLE_THREADS=OFF \
		-DLIBCXXABI_HAS_EXTERNAL_THREAD_API=OFF \
		-DLIBCXXABI_HAS_PTHREAD_API=OFF \
		-DLIBCXXABI_HAS_WIN32_THREAD_API=OFF \
		-DLIBCXXABI_INCLUDE_TESTS="$(want_check && echo ON || echo OFF)" \
		-DLIBCXXABI_LIBCXX_INCLUDES="$builddir"/build-libcxx/include/c++/v1 \
		-DLIBCXXABI_LIBCXX_PATH=libcxx \
		-DLIBCXXABI_LIBDIR_SUFFIX=/wasm32-wasi \
		-DLIBCXXABI_SILENT_TERMINATE:BOOL=ON \
		-DUNIX=ON \
		-DWASI_SDK_PREFIX=/usr
	cmake --build build
}

package() {
	DESTDIR="$pkgdir" cmake --install build
}

_libcxxabi() {
	pkgdesc="WASI Low level support for the LLVM C++ standard library."

	amove usr/share/wasi-sysroot/lib/wasm32-wasi/libc++abi.a
}

sha512sums="
4836d3603f32e8e54434cbfa8ef33d9d473ac5dc20ebf9c67132653c73f4524931abd1084655eaee5f20bcfcb91bcc4bbc5c4a0b603ad0c9029c556e14dc4c52  llvm-project-15.0.7.src.tar.xz
0a501fda853033425874537e0b0ed45d72b1f1488df99e16b7c1ab46d4f496e6329f9611f67bba0f9178f05df5cfe64706c7c34dab2eaee72e5274df6d85a77a  wasi-sdk-19.tar.gz
"