TERMUX_PKG_HOMEPAGE=https://clang.llvm.org/
TERMUX_PKG_DESCRIPTION="Modular compiler and toolchain technologies library"
TERMUX_PKG_LICENSE="NCSA"
TERMUX_PKG_VERSION=9.0.1
TERMUX_PKG_REVISION=8
TERMUX_PKG_SHA256=(00a1ee1f389f81e9979f3a640a01c431b3021de0d42278f6508391a2f0b81c9a
		   5778512b2e065c204010f88777d44b95250671103e434f9dc7363ab2e3804253
		   86262bad3e2fd784ba8c5e2158d7aa36f12b85f2515e95bc81d65d75bb9b0c82
		   5c94060f846f965698574d9ce22975c0e9f04c9b14088c3af5f03870af75cace
		   b26fd72a78bd7db998a26270ec9ec6a01346651d88fa87b4b323e13049fb6f07)
TERMUX_PKG_SRCURL=(https://github.com/llvm/llvm-project/releases/download/llvmorg-$TERMUX_PKG_VERSION/llvm-$TERMUX_PKG_VERSION.src.tar.xz
                   https://github.com/llvm/llvm-project/releases/download/llvmorg-$TERMUX_PKG_VERSION/clang-$TERMUX_PKG_VERSION.src.tar.xz
                   https://github.com/llvm/llvm-project/releases/download/llvmorg-$TERMUX_PKG_VERSION/lld-$TERMUX_PKG_VERSION.src.tar.xz
                   https://github.com/llvm/llvm-project/releases/download/llvmorg-$TERMUX_PKG_VERSION/openmp-$TERMUX_PKG_VERSION.src.tar.xz
                   https://github.com/llvm/llvm-project/releases/download/llvmorg-$TERMUX_PKG_VERSION/clang-tools-extra-$TERMUX_PKG_VERSION.src.tar.xz)
TERMUX_PKG_HOSTBUILD=true
TERMUX_PKG_RM_AFTER_INSTALL="
lib/libgomp.a
lib/libiomp5.a
"
TERMUX_PKG_DEPENDS="binutils, libc++, ncurses, ndk-sysroot, libffi, zlib"
# 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_BREAKS="libclang, libclang-dev, libllvm-dev"
TERMUX_PKG_REPLACES="gcc, libclang, libclang-dev, libllvm-dev"
# See http://llvm.org/docs/CMake.html:
TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
-DPYTHON_EXECUTABLE=$(which python3)
-DLLVM_ENABLE_PIC=ON
-DLLVM_ENABLE_LIBEDIT=OFF
-DLLVM_BUILD_TESTS=OFF
-DLLVM_INCLUDE_TESTS=OFF
-DCLANG_DEFAULT_CXX_STDLIB=libc++
-DCLANG_INCLUDE_TESTS=OFF
-DCLANG_TOOL_C_INDEX_TEST_BUILD=OFF
-DDEFAULT_SYSROOT=$(dirname $TERMUX_PREFIX)
-DLLVM_LINK_LLVM_DYLIB=ON
-DLLVM_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/llvm-tblgen
-DCLANG_TABLEGEN=$TERMUX_PKG_HOSTBUILD_DIR/bin/clang-tblgen
-DLIBOMP_ENABLE_SHARED=FALSE
-DOPENMP_ENABLE_LIBOMPTARGET=OFF
-DLLVM_BINUTILS_INCDIR=$TERMUX_PREFIX/include
-DLLVM_ENABLE_SPHINX=ON
-DSPHINX_OUTPUT_MAN=ON
-DLLVM_TARGETS_TO_BUILD=all
-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=RISCV
-DPERL_EXECUTABLE=$(which perl)
-DLLVM_ENABLE_FFI=ON
-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=AVR
"
TERMUX_PKG_FORCE_CMAKE=true
TERMUX_PKG_HAS_DEBUG=false
# Debug build succeeds but make install with:
# cp: cannot stat '../src/projects/openmp/runtime/exports/common.min.50.ompt.optional/include/omp.h': No such file or directory
# common.min.50.ompt.optional should be common.deb.50.ompt.optional when doing debug build

termux_step_post_extract_package() {
	if [ "$TERMUX_PKG_QUICK_REBUILD" = "false" ]; then
		mv clang-${TERMUX_PKG_VERSION}.src tools/clang
		mv clang-tools-extra-${TERMUX_PKG_VERSION}.src tools/clang/tools/extra
		mv lld-${TERMUX_PKG_VERSION}.src tools/lld
		mv openmp-${TERMUX_PKG_VERSION}.src projects/openmp
	fi
}

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() {
	if [ "$TERMUX_PKG_QUICK_REBUILD" = "false" ]; then
		mkdir projects/openmp/runtime/src/android
		cp $TERMUX_PKG_BUILDER_DIR/nl_types.h projects/openmp/runtime/src/android
		cp $TERMUX_PKG_BUILDER_DIR/nltypes_stubs.cpp projects/openmp/runtime/src/android
	fi

	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
	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=$LLVM_TARGET_ARCH -DLLVM_TARGETS_TO_BUILD=all"
	TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" -DLLVM_HOST_TRIPLE=$LLVM_DEFAULT_TARGET_TRIPLE"
}
termux_step_post_make_install() {
	if [ $TERMUX_ARCH = "arm" ]; then
		cp $TERMUX_PKG_SRCDIR/projects/openmp/runtime/exports/common/include/omp.h $TERMUX_PREFIX/include
	else
		cp $TERMUX_PKG_SRCDIR/projects/openmp/runtime/exports/common.ompt.optional/include/omp.h $TERMUX_PREFIX/include
	fi	
	if [ "$TERMUX_CMAKE_BUILD" = Ninja ]; then
		ninja docs-llvm-man
	else
		make docs-llvm-man
	fi

	cp docs/man/* $TERMUX_PREFIX/share/man/man1
	cd $TERMUX_PREFIX/bin

	for tool in clang clang++ cc c++ cpp gcc g++ ${TERMUX_HOST_PLATFORM}-{clang,clang++,gcc,g++,cpp}; do
		ln -f -s clang-${TERMUX_PKG_VERSION:0:1} $tool
	done
}

termux_step_post_massage() {
	sed $TERMUX_PKG_BUILDER_DIR/llvm-config.in \
		-e "s|@TERMUX_PKG_VERSION@|$TERMUX_PKG_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
	cp $TERMUX_PKG_HOSTBUILD_DIR/bin/llvm-tblgen $TERMUX_PREFIX/bin
	cp $TERMUX_PKG_HOSTBUILD_DIR/bin/clang-tblgen $TERMUX_PREFIX/bin
}