cmake/FindLLVM.cmake

FindLLVM.cmake

# LLVM_FOUND
# LLVM_INCLUDE_DIRS
# LLVM_LIBRARIES
# LLVM_LIBDIRS

set(LLVM_CONFIG_ERROR_MESSAGES "")
unset(LLVM_CONFIG_EXE CACHE)
find_program(LLVM_CONFIG_EXE
		NAMES llvm-config NAMES_PER_DIR
)

if ("${LLVM_CONFIG_EXE}" STREQUAL "LLVM_CONFIG_EXE-NOTFOUND")
	if (NOT LLVM_CONFIG_ERROR_MESSAGES STREQUAL "")
		list(JOIN LLVM_CONFIG_ERROR_MESSAGES "\n" LLVM_CONFIG_ERROR_MESSAGE)
		message(FATAL_ERROR ${LLVM_CONFIG_ERROR_MESSAGE})
	else()
		message(FATAL_ERROR "unable to find llvm-config")
	endif()
endif()

# Check that this LLVM is the right version
execute_process(
	COMMAND ${LLVM_CONFIG_EXE} --version
	OUTPUT_VARIABLE LLVM_CONFIG_VERSION
	OUTPUT_STRIP_TRAILING_WHITESPACE)

get_filename_component(LLVM_CONFIG_DIR "${LLVM_CONFIG_EXE}" DIRECTORY)

execute_process(
	COMMAND ${LLVM_CONFIG_EXE} --libnames
	OUTPUT_STRIP_TRAILING_WHITESPACE
	OUTPUT_VARIABLE LLVM_LIBRARIES
	ERROR_VARIABLE LLVM_CONFIG_ERROR
	ERROR_STRIP_TRAILING_WHITESPACE
)

if (LLVM_CONFIG_ERROR) 
	message(FATAL_ERROR Could not find LLVM ${LLVM_CONFIG_ERROR})
endif()

execute_process(
	COMMAND ${LLVM_CONFIG_EXE} --libdir
	OUTPUT_STRIP_TRAILING_WHITESPACE
	OUTPUT_VARIABLE LLVM_LIBDIRS
	ERROR_VARIABLE LLVM_CONFIG_ERROR
	ERROR_STRIP_TRAILING_WHITESPACE
)

execute_process(
	COMMAND ${LLVM_CONFIG_EXE} --includedir
	OUTPUT_VARIABLE LLVM_INCLUDE_DIRS_SPACES
	OUTPUT_STRIP_TRAILING_WHITESPACE
)
string(REPLACE " " ";" LLVM_INCLUDE_DIRS "${LLVM_INCLUDE_DIRS_SPACES}")

link_directories("${CMAKE_PREFIX_PATH}/lib")
link_directories("${LLVM_LIBDIRS}")

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LLVM DEFAULT_MSG LLVM_LIBRARIES LLVM_INCLUDE_DIRS)

mark_as_advanced(LLVM_INCLUDE_DIRS LLVM_LIBRARIES LLVM_LIBDIRS)