#!/bin/sh

NAME="wasi-libcxx"
DESC="WASI LLVM C++ standard library"

MAKEDEPS="cmake "
DEPS="musl "

PKG_VER=13.0.1
wasi_sdk_ver=14

SOURCE="https://github.com/WebAssembly/wasi-sdk/archive/refs/tags/wasi-sdk-$wasi_sdk_ver.tar.gz"
ADDITIONAL="
https://github.com/llvm/llvm-project/releases/download/llvmorg-$PKG_VER/libcxx-$PKG_VER.src.tar.xz
https://github.com/llvm/llvm-project/releases/download/llvmorg-$PKG_VER/libcxxabi-$PKG_VER.src.tar.xz
https://github.com/llvm/llvm-project/releases/download/llvmorg-$PKG_VER/llvm-$PKG_VER.src.tar.xz
"

builddir="$BUILD_ROOT/wasi-libcxx"

prepare () {
    mkdir -p $builddir/

    for s in libcxx libcxxabi llvm; do
        tar xf $s-$PKG_VER.src.tar.xz
		mv $s-$PKG_VER.src $builddir/$s
	done

    mv wasi-sdk.cmake "$builddir"
	mv cmake "$builddir"
}

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

    cd $builddir
    	cmake -B build-libcxx -G Ninja \
		-DCMAKE_BUILD_TYPE=MinSizeRel \
		-DCMAKE_MODULE_PATH="$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 \
		-DLIBCXX_INCLUDE_TESTS=ON \
		-DLIBCXX_ENABLE_EXCEPTIONS=OFF \
		-DLIBCXX_ENABLE_SHARED=OFF \
		-DLIBCXX_ENABLE_THREADS=OFF \
		-DLIBCXX_HAS_PTHREAD_API=OFF \
		-DLIBCXX_HAS_EXTERNAL_THREAD_API=OFF \
		-DLIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY=OFF \
		-DLIBCXX_HAS_WIN32_THREAD_API=OFF \
		-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY=OFF \
		-DLIBCXX_ENABLE_FILESYSTEM=OFF \
		-DLIBCXX_CXX_ABI=libcxxabi \
		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=libcxxabi/include \
		-DLIBCXX_HAS_MUSL_LIBC=ON \
		-DLIBCXX_ABI_VERSION=2 \
		-DWASI_SDK_PREFIX=/usr \
		-DLIBCXX_LIBDIR_SUFFIX=/wasm32-wasi \
		libcxx

	cmake -B build-libcxxabi -G Ninja \
		-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 \
		-DLIBCXXABI_INCLUDE_TESTS=ON \
		-DLIBCXXABI_ENABLE_EXCEPTIONS=OFF \
		-DLIBCXXABI_ENABLE_SHARED=OFF \
		-DLIBCXXABI_ENABLE_THREADS=OFF \
		-DLIBCXXABI_HAS_PTHREAD_API=OFF \
		-DLIBCXXABI_HAS_EXTERNAL_THREAD_API=OFF \
		-DLIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY=OFF \
		-DLIBCXXABI_HAS_WIN32_THREAD_API=OFF \
		-DLIBCXXABI_SILENT_TERMINATE:BOOL=ON \
		-DLIBCXXABI_ENABLE_PIC=OFF \
		-DUNIX=ON \
		-DCXX_SUPPORTS_CXX11=ON \
		-DLIBCXXABI_LIBCXX_PATH=libcxx \
		-DLIBCXXABI_LIBCXX_INCLUDES="$builddir"/build-libcxx/include/c++/v1 \
		-DWASI_SDK_PREFIX=/usr \
		-DLIBCXXABI_LIBDIR_SUFFIX=/wasm32-wasi \
		libcxxabi

	cmake --build build-libcxx
	cmake --build build-libcxxabi

}

package () {
	DESTDIR="$PKG_DEST" cmake --install build-libcxx
    DESTDIR="$PKG_DEST" cmake --install build-libcxxabi
}