# Contributor: Jakub Jirutka <jakub@jirutka.cz>
# Maintainer: Jakub Jirutka <jakub@jirutka.cz>

# NOTE: This is a fork of LLVM project needed for emscripten. It provides
#   JSBackend and WebAssembly, these will be hopefully someday merged into
#   upstream LLVM.
# TODO: Remove unneeded binaries.
setvar pkgname = 'emscripten-fastcomp'
# Keep in sync with package emscripten!
setvar pkgver = '1.37.10'
setvar pkgrel = '0'
setvar pkgdesc = ""The Clang + LLVM backend for Emscripten""
setvar url = ""https://kripken.github.io/emscripten-site/""
setvar arch = ""all""
setvar license = ""UOI-NCSA""
setvar depends = ""python2""
setvar makedepends = ""cmake paxmark zlib-dev""
setvar source = ""$pkgname-$pkgver.tar.gz::https://github.com/kripken/$pkgname/archive/$pkgver.tar.gz
	$pkgname-clang-$pkgver.tar.gz::https://github.com/kripken/$pkgname-clang/archive/$pkgver.tar.gz
	llvm-fix-build-with-musl-libc.patch
	llvm-fix-DynamicLibrary-to-build-with-musl-libc.patch""
setvar builddir = ""$srcdir/$pkgname-$pkgver""
setvar options = ""!check""  # some tests are broken, don't bother with it for now

setvar _prefix = ""usr/lib/$pkgname""
setvar ldpath = ""/$_prefix/lib""
# Avoid conflicts in provided so:* names with llvm package.
setvar sonameprefix = ""$pkgname:""

proc prepare {
	ln -sf ../../$pkgname-clang-$pkgver "$builddir"/tools/clang

	default_prepare
}

proc build {
	mkdir -p "$builddir"/build
	cd "$builddir"/build

	# XXX: Is it a good idea to omit X86 in LLVM_TARGETS_TO_BUILD?
	# https://github.com/kripken/emscripten-fastcomp/issues/174
	cmake .. \
		-DCMAKE_BUILD_TYPE=Release \
		-DCMAKE_INSTALL_PREFIX="/$_prefix" \
		-DCMAKE_VERBOSE_MAKEFILE=NO \
		-DPYTHON_EXECUTABLE=/usr/bin/python2 \
		-DCLANG_BUILD_EXAMPLES=OFF \
		-DCLANG_INCLUDE_TESTS=OFF \
		-DLLVM_BUILD_DOCS=OFF \
		-DLLVM_BUILD_LLVM_DYLIB=ON \
		-DLLVM_BUILD_RUNTIME=OFF \
		-DLLVM_ENABLE_ZLIB=ON \
		-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly \
		-DLLVM_HOST_TRIPLE="$CHOST" \
		-DLLVM_INCLUDE_EXAMPLES=OFF \
		-DLLVM_INCLUDE_TESTS=OFF \
		-DLLVM_LINK_LLVM_DYLIB=ON \
		-DLLVM_TARGETS_TO_BUILD=JSBackend
	make -j ${JOBS:-2}

	paxmark m \
		bin/llvm-rtdyld \
		bin/lli \
		bin/lli-child-target
}

proc package {
	cd "$builddir"/build
	make install DESTDIR="$pkgdir"

	cd "$pkgdir"/$_prefix

	# emcc -v expects this file to exist.
	cp "$builddir"/emscripten-version.txt .

	# Remove unneeded files and clutter.
	rm -r include libexec share lib/clang lib/cmake
	rm lib/*.a bin/*-test
}

setvar sha512sums = ""911c4b1a23da149161dd2a8cc8e7b59db55f0d35665aa589edbf1207d8cf5c21e1dfab6af5a1bf99172bedda50b42ebc74d651eaa9a1f9547ad459e6adb074d7  emscripten-fastcomp-1.37.10.tar.gz
0c01945fe9a9e31c130f70baa7d495aba49bc951bb4043979d331b3173f2527dcbc0e0a8b9c670ac8ccfdf80db4c8393d38bba2aa1e49bca09c99d6aa43a1152  emscripten-fastcomp-clang-1.37.10.tar.gz
f84cd65d7042e89826ba6e8d48c4c302bf4980da369d7f19a55f217e51c00ca8ed178d453df3a3cee76598a7cecb94aed0775a6d24fe73266f82749913fc3e71  llvm-fix-build-with-musl-libc.patch
19bfb9282455d39d07dbb2b1293b03a45c57d522fbb9c5e58dac034200669628b97e7a90cd4ff5d52d9bb79acfccbef653d8a1140a7f0589ecd6f9b7c4ba0eb6  llvm-fix-DynamicLibrary-to-build-with-musl-libc.patch""