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#
# Get the Clang resource directory.
#
# If found the following variable will be set:
# - CLANG_RESOURCE_DIR
#
set(CHECK_CLANG_RESOURCE_DIR_CHECKER_CODE_IN
${CMAKE_CURRENT_LIST_DIR}/LibClangDiagnosticsChecker.cpp)
function(check_clang_resource_dir)
if (CLANG_RESOURCE_DIR)
return() # already in cache
endif()
message(STATUS "Detecting Clang resource directory")
find_package (LibClang REQUIRED)
set(checker_code
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/LibClangDiagnosticsChecker.cpp)
set(checked_file
"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/check-libclang-stddef.cpp")
configure_file(${CHECK_CLANG_RESOURCE_DIR_CHECKER_CODE_IN}
${checker_code} COPYONLY)
file(WRITE "${checked_file}" "#include <stddef.h>\n")
# Paths stolen from Rip-Rip/clang_complete#getBuiltinHeaderPath()
find_path(CHECK_CLANG_RESOURCE_DIR include/stddef.h
NO_DEFAULT_PATH
# the default path, favor this one over the other, in case a specific
# libclang has been chosen.
HINTS "${LIBCLANG_LIBRARY_DIR}/../lib/clang"
# other, distribution specific, paths
PATHS
"${LIBCLANG_LIBRARY_DIR}/../clang" # Gentoo
"${LIBCLANG_LIBRARY_DIR}/clang" # openSUSE, Windows
"${LIBCLANG_LIBRARY_DIR}/" # Google
"/usr/lib64/clang" # x86_64 (openSUSE, Fedora)
"/usr/lib/clang"
PATH_SUFFIXES ${LIBCLANG_KNOWN_LLVM_VERSIONS})
if (CHECK_CLANG_RESOURCE_DIR)
# On Windows the paths weren't escaped correctly, similar to:
# http://public.kitware.com/pipermail/cmake/2006-February/008473.html
list(APPEND run_args -resource-dir \"${CHECK_CLANG_RESOURCE_DIR}\")
endif()
list(APPEND run_args ${checked_file})
try_run(
CHECK_CLANG_RESOURCE_DIR_NUM_DIAGNOSTICS
CHECK_CLANG_RESOURCE_DIR_COMPILE_RESULT
${CMAKE_BINARY_DIR}
${checker_code}
CMAKE_FLAGS
"-DINCLUDE_DIRECTORIES:STRING=${LIBCLANG_INCLUDE_DIRS}"
"-DLINK_LIBRARIES:STRING=${LIBCLANG_LIBRARIES}"
COMPILE_OUTPUT_VARIABLE compile_output
RUN_OUTPUT_VARIABLE run_output
ARGS ${run_args}
)
if (NOT CHECK_CLANG_RESOURCE_DIR_COMPILE_RESULT)
set(CHECK_CLANG_RESOURCE_DIR_NUM_DIAGNOSTICS 1)
endif()
if (CHECK_CLANG_RESOURCE_DIR_NUM_DIAGNOSTICS EQUAL 0)
message(STATUS "Detecting libclang builtin headers directory -- success")
if (CHECK_CLANG_RESOURCE_DIR)
set(CLANG_RESOURCE_DIR "${CHECK_CLANG_RESOURCE_DIR}"
CACHE INTERNAL "Clang resource directory.")
endif()
else()
message(STATUS "Detecting Clang resource directory -- fail")
if (NOT CHECK_CLANG_RESOURCE_DIR_COMPILE_RESULT)
message(WARNING "CheckClangResourceDir: failed to compile checker, please report.
Compile output:
${compile_output}
")
else()
message(WARNING "CheckClangResourceDir: unsupported configuration, please report.
Check with args: ${run_args}
Check output:
${run_output}
")
endif()
endif()
endfunction()
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