| include(CheckLibraryExists) |
| include(CheckCCompilerFlag) |
| include(CheckCXXCompilerFlag) |
| |
| check_library_exists(c fopen "" LIBCXXABI_HAS_C_LIB) |
| if (NOT LIBCXXABI_USE_COMPILER_RT) |
| check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXXABI_HAS_GCC_S_LIB) |
| endif () |
| |
| # libc++abi is built with -nodefaultlibs, so we want all our checks to also |
| # use this option, otherwise we may end up with an inconsistency between |
| # the flags we think we require during configuration (if the checks are |
| # performed without -nodefaultlibs) and the flags that are actually |
| # required during compilation (which has the -nodefaultlibs). libc is |
| # required for the link to go through. We remove sanitizers from the |
| # configuration checks to avoid spurious link errors. |
| check_c_compiler_flag(-nodefaultlibs LIBCXXABI_HAS_NODEFAULTLIBS_FLAG) |
| if (LIBCXXABI_HAS_NODEFAULTLIBS_FLAG) |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs") |
| if (LIBCXXABI_HAS_C_LIB) |
| list(APPEND CMAKE_REQUIRED_LIBRARIES c) |
| endif () |
| if (LIBCXXABI_USE_COMPILER_RT) |
| list(APPEND CMAKE_REQUIRED_FLAGS -rtlib=compiler-rt) |
| find_compiler_rt_library(builtins LIBCXXABI_BUILTINS_LIBRARY) |
| list(APPEND CMAKE_REQUIRED_LIBRARIES "${LIBCXXABI_BUILTINS_LIBRARY}") |
| elseif (LIBCXXABI_HAS_GCC_S_LIB) |
| list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s) |
| endif () |
| if (MINGW) |
| # Mingw64 requires quite a few "C" runtime libraries in order for basic |
| # programs to link successfully with -nodefaultlibs. |
| if (LIBCXXABI_USE_COMPILER_RT) |
| set(MINGW_RUNTIME ${LIBCXXABI_BUILTINS_LIBRARY}) |
| else () |
| set(MINGW_RUNTIME gcc_s gcc) |
| endif() |
| set(MINGW_LIBRARIES mingw32 ${MINGW_RUNTIME} moldname mingwex msvcrt advapi32 |
| shell32 user32 kernel32 mingw32 ${MINGW_RUNTIME} |
| moldname mingwex msvcrt) |
| list(APPEND CMAKE_REQUIRED_LIBRARIES ${MINGW_LIBRARIES}) |
| endif() |
| if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize) |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all") |
| endif () |
| if (CMAKE_C_FLAGS MATCHES -fsanitize-coverage OR CMAKE_CXX_FLAGS MATCHES -fsanitize-coverage) |
| set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters") |
| endif () |
| endif () |
| |
| # Check compiler flags |
| check_c_compiler_flag(-funwind-tables LIBCXXABI_HAS_FUNWIND_TABLES) |
| check_cxx_compiler_flag(-fno-exceptions LIBCXXABI_HAS_NO_EXCEPTIONS_FLAG) |
| check_cxx_compiler_flag(-fno-rtti LIBCXXABI_HAS_NO_RTTI_FLAG) |
| check_cxx_compiler_flag(-fstrict-aliasing LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG) |
| check_cxx_compiler_flag(-nostdinc++ LIBCXXABI_HAS_NOSTDINCXX_FLAG) |
| check_cxx_compiler_flag(-Wall LIBCXXABI_HAS_WALL_FLAG) |
| check_cxx_compiler_flag(-W LIBCXXABI_HAS_W_FLAG) |
| check_cxx_compiler_flag(-Wunused-function LIBCXXABI_HAS_WUNUSED_FUNCTION_FLAG) |
| check_cxx_compiler_flag(-Wunused-variable LIBCXXABI_HAS_WUNUSED_VARIABLE_FLAG) |
| check_cxx_compiler_flag(-Wunused-parameter LIBCXXABI_HAS_WUNUSED_PARAMETER_FLAG) |
| check_cxx_compiler_flag(-Wstrict-aliasing LIBCXXABI_HAS_WSTRICT_ALIASING_FLAG) |
| check_cxx_compiler_flag(-Wstrict-overflow LIBCXXABI_HAS_WSTRICT_OVERFLOW_FLAG) |
| check_cxx_compiler_flag(-Wwrite-strings LIBCXXABI_HAS_WWRITE_STRINGS_FLAG) |
| check_cxx_compiler_flag(-Wchar-subscripts LIBCXXABI_HAS_WCHAR_SUBSCRIPTS_FLAG) |
| check_cxx_compiler_flag(-Wmismatched-tags LIBCXXABI_HAS_WMISMATCHED_TAGS_FLAG) |
| check_cxx_compiler_flag(-Wmissing-braces LIBCXXABI_HAS_WMISSING_BRACES_FLAG) |
| check_cxx_compiler_flag(-Wshorten-64-to-32 LIBCXXABI_HAS_WSHORTEN_64_TO_32_FLAG) |
| check_cxx_compiler_flag(-Wsign-conversion LIBCXXABI_HAS_WSIGN_CONVERSION_FLAG) |
| check_cxx_compiler_flag(-Wsign-compare LIBCXXABI_HAS_WSIGN_COMPARE_FLAG) |
| check_cxx_compiler_flag(-Wshadow LIBCXXABI_HAS_WSHADOW_FLAG) |
| check_cxx_compiler_flag(-Wconversion LIBCXXABI_HAS_WCONVERSION_FLAG) |
| check_cxx_compiler_flag(-Wnewline-eof LIBCXXABI_HAS_WNEWLINE_EOF_FLAG) |
| check_cxx_compiler_flag(-Wundef LIBCXXABI_HAS_WUNDEF_FLAG) |
| check_cxx_compiler_flag(-pedantic LIBCXXABI_HAS_PEDANTIC_FLAG) |
| check_cxx_compiler_flag(-Werror LIBCXXABI_HAS_WERROR_FLAG) |
| check_cxx_compiler_flag(-Wno-error LIBCXXABI_HAS_WNO_ERROR_FLAG) |
| check_cxx_compiler_flag(/WX LIBCXXABI_HAS_WX_FLAG) |
| check_cxx_compiler_flag(/WX- LIBCXXABI_HAS_NO_WX_FLAG) |
| check_cxx_compiler_flag(/EHsc LIBCXXABI_HAS_EHSC_FLAG) |
| check_cxx_compiler_flag(/EHs- LIBCXXABI_HAS_NO_EHS_FLAG) |
| check_cxx_compiler_flag(/EHa- LIBCXXABI_HAS_NO_EHA_FLAG) |
| check_cxx_compiler_flag(/GR- LIBCXXABI_HAS_NO_GR_FLAG) |
| |
| # Check libraries |
| check_library_exists(dl dladdr "" LIBCXXABI_HAS_DL_LIB) |
| check_library_exists(pthread pthread_once "" LIBCXXABI_HAS_PTHREAD_LIB) |
| check_library_exists(c __cxa_thread_atexit_impl "" |
| LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL) |
