TERMUX_PKG_HOMEPAGE=https://clang.llvm.org/
TERMUX_PKG_DESCRIPTION="Modular compiler and toolchain technologies library"
_PKG_MAJOR_VERSION=5.0
TERMUX_PKG_VERSION=${_PKG_MAJOR_VERSION}.1
TERMUX_PKG_REVISION=1
TERMUX_PKG_SHA256=5fa7489fc0225b11821cab0362f5813a05f2bcf2533e8a4ea9c9c860168807b0
TERMUX_PKG_SRCURL=https://releases.llvm.org/${TERMUX_PKG_VERSION}/llvm-${TERMUX_PKG_VERSION}.src.tar.xz
TERMUX_PKG_HOSTBUILD=true
TERMUX_PKG_RM_AFTER_INSTALL="
bin/bugpoint
bin/clang-check
bin/clang-import-test
bin/clang-offload-bundler
bin/git-clang-format
bin/llvm-tblgen
bin/macho-dump
bin/sancov
bin/sanstats
bin/scan-build
bin/scan-view
lib/BugpointPasses.so
lib/libclang*.a
lib/libLLVM*.a
lib/libLTO.so
lib/LLVMHello.so
share/man/man1/scan-build.1
share/scan-build
share/scan-view
"
TERMUX_PKG_DEPENDS="binutils, ncurses, ndk-sysroot, ndk-stl"
# Replace gcc since gcc is deprecated by google on android and is not maintained upstream.
# Conflict with clang versions earlier than 3.9.1-3 since they bundled llvm.
TERMUX_PKG_CONFLICTS="gcc, clang (<< 3.9.1-3)"
TERMUX_PKG_REPLACES=gcc
# See http://llvm.org/docs/CMake.html:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
-DPYTHON_EXECUTABLE=`which python`
-DLLVM_ENABLE_PIC=ON
-DLLVM_ENABLE_LIBEDIT=OFF
-DLLVM_BUILD_TESTS=OFF
-DLLVM_INCLUDE_TESTS=OFF
-DCLANG_DEFAULT_CXX_STDLIB=libc++
-DCLANG_INCLUDE_TESTS=OFF
-DCLANG_TOOL_C_INDEX_TEST_BUILD=OFF
-DC_INCLUDE_DIRS=$TERMUX_PREFIX/include
-DLLVM_LINK_LLVM_DYLIB=ON
-DLLVM_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/llvm-tblgen
-DCLANG_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/clang-tblgen"
TERMUX_PKG_FORCE_CMAKE=yes
TERMUX_PKG_KEEP_STATIC_LIBRARIES=true

termux_step_post_extract_package () {
	local CLANG_SRC_TAR=cfe-${TERMUX_PKG_VERSION}.src.tar.xz
	termux_download \
		https://releases.llvm.org/${TERMUX_PKG_VERSION}/$CLANG_SRC_TAR \
		$TERMUX_PKG_CACHEDIR/$CLANG_SRC_TAR \
		135f6c9b0cd2da1aff2250e065946258eb699777888df39ca5a5b4fe5e23d0ff

	tar -xf $TERMUX_PKG_CACHEDIR/$CLANG_SRC_TAR -C tools
	mv tools/cfe-${TERMUX_PKG_VERSION}.src tools/clang

	local LLD_SRC_TAR=lld-${TERMUX_PKG_VERSION}.src.tar.xz
	termux_download \
		https://llvm.org/releases/${TERMUX_PKG_VERSION}/$LLD_SRC_TAR \
		$TERMUX_PKG_CACHEDIR/$LLD_SRC_TAR \
		d5b36c0005824f07ab093616bdff247f3da817cae2c51371e1d1473af717d895

	tar -xf $TERMUX_PKG_CACHEDIR/$LLD_SRC_TAR -C tools
	mv tools/lld-${TERMUX_PKG_VERSION}.src tools/lld
}

termux_step_host_build () {
	termux_setup_cmake
	cmake -G "Unix Makefiles" $TERMUX_PKG_SRCDIR \
		-DLLVM_BUILD_TESTS=OFF \
		-DLLVM_INCLUDE_TESTS=OFF
	make -j $TERMUX_MAKE_PROCESSES clang-tblgen llvm-tblgen
}

termux_step_pre_configure () {
	cd $TERMUX_PKG_BUILDDIR
	export LLVM_DEFAULT_TARGET_TRIPLE=$TERMUX_HOST_PLATFORM
	export LLVM_TARGET_ARCH
	if [ $TERMUX_ARCH = "arm" ]; then
		LLVM_TARGET_ARCH=ARM
		# See https://github.com/termux/termux-packages/issues/282
		LLVM_DEFAULT_TARGET_TRIPLE="armv7a-linux-androideabi"
	elif [ $TERMUX_ARCH = "aarch64" ]; then
		LLVM_TARGET_ARCH=AArch64
	elif [ $TERMUX_ARCH = "i686" ]; then
		LLVM_TARGET_ARCH=X86
	elif [ $TERMUX_ARCH = "x86_64" ]; then
		LLVM_TARGET_ARCH=X86
	else
		termux_error_exit "Invalid arch: $TERMUX_ARCH"
	fi
        # see CMakeLists.txt and tools/clang/CMakeLists.txt
	TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DLLVM_DEFAULT_TARGET_TRIPLE=$LLVM_DEFAULT_TARGET_TRIPLE"
	TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DLLVM_TARGET_ARCH=$LLVM_TARGET_ARCH -DLLVM_TARGETS_TO_BUILD=all"
}

termux_step_post_make_install () {
	cd $TERMUX_PREFIX/bin

	for tool in clang clang++ cc c++ cpp gcc g++ ${TERMUX_HOST_PLATFORM}-{clang,clang++,gcc,g++,cpp}; do
		ln -f -s clang-${_PKG_MAJOR_VERSION} $tool
	done

	local OPENMP_ARCH
	if [ $TERMUX_ARCH = "i686" ]; then
		OPENMP_ARCH="i386"
	else
		OPENMP_ARCH=$TERMUX_ARCH
	fi

	local OPENMP_PATH=lib64/clang/5.0/lib/linux/$OPENMP_ARCH/libomp.a
	cp $TERMUX_STANDALONE_TOOLCHAIN/$OPENMP_PATH $TERMUX_PREFIX/lib
}

termux_step_post_massage () {
	sed $TERMUX_PKG_BUILDER_DIR/llvm-config.in \
		-e "s|@_PKG_MAJOR_VERSION@|$_PKG_MAJOR_VERSION|g" \
		-e "s|@TERMUX_PREFIX@|$TERMUX_PREFIX|g" \
		-e "s|@TERMUX_PKG_SRCDIR@|$TERMUX_PKG_SRCDIR|g" \
		-e "s|@LLVM_TARGET_ARCH@|$LLVM_TARGET_ARCH|g" \
		-e "s|@LLVM_DEFAULT_TARGET_TRIPLE@|$LLVM_DEFAULT_TARGET_TRIPLE|g" \
		-e "s|@TERMUX_ARCH@|$TERMUX_ARCH|g" > $TERMUX_PREFIX/bin/llvm-config
	chmod 755 $TERMUX_PREFIX/bin/llvm-config
}