# Description: WASI libc++ implementation for WebAssembly
# URL: https://libcxx.llvm.org/
# Maintainer: John McQuah, jmcquah at disroot dot org
# Depends on: wasi-compiler-rt

name=wasi-libc++
version=18.1.4
release=1
source=(https://github.com/llvm/llvm-project/releases/download/llvmorg-$version/llvm-project-$version.src.tar.xz
  wasi-sdk.cmake)

build() {
  cd llvm-project-$version.src

  mkdir -p build cmake/Platform
  cp "$SRC"/wasi-sdk.cmake build
  echo "set(WASI 1)" > cmake/Platform/WASI.cmake

  cmake -G Ninja -S runtimes -B build  \
    -D CMAKE_BUILD_TYPE=Release \
    -D CMAKE_C_FLAGS="-O3 -pipe -DNDEBUG -fno-exceptions --sysroot=/usr/share/wasi-sysroot" \
    -D CMAKE_CXX_FLAGS="-O3 -pipe -DNDEBUG -fno-exceptions --sysroot=/usr/share/wasi-sysroot" \
    -D CMAKE_TOOLCHAIN_FILE=wasi-sdk.cmake \
    -D CMAKE_CXX_COMPILER_WORKS=ON \
    -D CMAKE_C_COMPILER_WORKS=ON \
    -D CMAKE_INSTALL_PREFIX=/usr/share/wasi-sysroot \
    -D LLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" \
    -D LLVM_DEFAULT_TARGET_TRIPLE=wasm32-wasi \
    -D LIBCXX_ABI_VERSION=2 \
    -D LIBCXX_ENABLE_EXCEPTIONS=OFF \
    -D LIBCXX_ENABLE_FILESYSTEM=OFF \
    -D LIBCXX_ENABLE_SHARED=OFF \
    -D LIBCXX_ENABLE_THREADS=OFF \
    -D LIBCXX_HAS_EXTERNAL_THREAD_API=OFF \
    -D LIBCXX_HAS_PTHREAD_API=OFF \
    -D LIBCXX_HAS_WIN32_THREAD_API=OFF \
    -D LIBCXX_INCLUDE_TESTS=OFF \
    -D LIBCXX_LIBDIR_SUFFIX=/wasm32-wasi \
    -D LIBCXXABI_ENABLE_EXCEPTIONS=OFF \
    -D LIBCXXABI_ENABLE_SHARED=OFF \
    -D LIBCXXABI_ENABLE_THREADS=OFF \
    -D LIBCXXABI_HAS_EXTERNAL_THREAD_API=OFF \
    -D LIBCXXABI_HAS_PTHREAD_API=OFF \
    -D LIBCXXABI_HAS_WIN32_THREAD_API=OFF \
    -D LIBCXXABI_INCLUDE_TESTS=OFF \
    -D LIBCXXABI_LIBDIR_SUFFIX=/wasm32-wasi \
    -D LIBCXXABI_SILENT_TERMINATE:BOOL=ON \
    -D LIBCXXABI_USE_LLVM_UNWINDER=OFF \
    -D UNIX=ON \
    -D WASI_SDK_PREFIX=/usr

  ninja -C build -j ${JOBS:-1} cxx cxxabi
  DESTDIR="$PKG" ninja -C build install-cxx install-cxxabi

  cd "$PKG"/usr/share/wasi-sysroot/lib/wasm32-wasi
    for f in *.a; do
    /usr/bin/llvm-ranlib $f
    /usr/bin/llvm-strip --strip-debug $f
  done
}