1 2 include(CheckCCompilerFlag) 3 include(CheckCXXCompilerFlag) 4 include(CheckLibraryExists) 5 6 check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB) 7 8 if (NOT LIBUNWIND_USE_COMPILER_RT) 9 check_library_exists(gcc_s __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_S_LIB) 10 check_library_exists(gcc __absvdi2 "" LIBUNWIND_HAS_GCC_LIB) 11 endif() 12 13 # libunwind is built with -nodefaultlibs, so we want all our checks to also 14 # use this option, otherwise we may end up with an inconsistency between 15 # the flags we think we require during configuration (if the checks are 16 # performed without -nodefaultlibs) and the flags that are actually 17 # required during compilation (which has the -nodefaultlibs). libc is 18 # required for the link to go through. We remove sanitizers from the 19 # configuration checks to avoid spurious link errors. 20 check_c_compiler_flag(-nodefaultlibs LIBUNWIND_HAS_NODEFAULTLIBS_FLAG) 21 if (LIBUNWIND_HAS_NODEFAULTLIBS_FLAG) 22 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs") 23 if (LIBUNWIND_HAS_C_LIB) 24 list(APPEND CMAKE_REQUIRED_LIBRARIES c) 25 endif () 26 if (LIBUNWIND_USE_COMPILER_RT) 27 find_compiler_rt_library(builtins LIBUNWIND_BUILTINS_LIBRARY) 28 list(APPEND CMAKE_REQUIRED_LIBRARIES "${LIBUNWIND_BUILTINS_LIBRARY}") 29 else () 30 if (LIBUNWIND_HAS_GCC_S_LIB) 31 list(APPEND CMAKE_REQUIRED_LIBRARIES gcc_s) 32 endif () 33 if (LIBUNWIND_HAS_GCC_LIB) 34 list(APPEND CMAKE_REQUIRED_LIBRARIES gcc) 35 endif () 36 endif () 37 if (MINGW) 38 # Mingw64 requires quite a few "C" runtime libraries in order for basic 39 # programs to link successfully with -nodefaultlibs. 40 if (LIBUNWIND_USE_COMPILER_RT) 41 set(MINGW_RUNTIME ${LIBUNWIND_BUILTINS_LIBRARY}) 42 else () 43 set(MINGW_RUNTIME gcc_s gcc) 44 endif() 45 set(MINGW_LIBRARIES mingw32 ${MINGW_RUNTIME} moldname mingwex msvcrt advapi32 46 shell32 user32 kernel32 mingw32 ${MINGW_RUNTIME} 47 moldname mingwex msvcrt) 48 list(APPEND CMAKE_REQUIRED_LIBRARIES ${MINGW_LIBRARIES}) 49 endif() 50 if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize) 51 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all") 52 endif () 53 if (CMAKE_C_FLAGS MATCHES -fsanitize-coverage OR CMAKE_CXX_FLAGS MATCHES -fsanitize-coverage) 54 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters") 55 endif () 56 endif () 57 58 # Check compiler flags 59 check_c_compiler_flag(-funwind-tables LIBUNWIND_HAS_FUNWIND_TABLES) 60 check_cxx_compiler_flag(-fno-exceptions LIBUNWIND_HAS_NO_EXCEPTIONS_FLAG) 61 check_cxx_compiler_flag(-fno-rtti LIBUNWIND_HAS_NO_RTTI_FLAG) 62 check_cxx_compiler_flag(-fstrict-aliasing LIBUNWIND_HAS_FSTRICT_ALIASING_FLAG) 63 check_cxx_compiler_flag(-nostdinc++ LIBUNWIND_HAS_NOSTDINCXX_FLAG) 64 check_cxx_compiler_flag(-Wall LIBUNWIND_HAS_WALL_FLAG) 65 check_cxx_compiler_flag(-W LIBUNWIND_HAS_W_FLAG) 66 check_cxx_compiler_flag(-Wno-unused-function LIBUNWIND_HAS_WNO_UNUSED_FUNCTION_FLAG) 67 check_cxx_compiler_flag(-Wunused-variable LIBUNWIND_HAS_WUNUSED_VARIABLE_FLAG) 68 check_cxx_compiler_flag(-Wunused-parameter LIBUNWIND_HAS_WUNUSED_PARAMETER_FLAG) 69 check_cxx_compiler_flag(-Wstrict-aliasing LIBUNWIND_HAS_WSTRICT_ALIASING_FLAG) 70 check_cxx_compiler_flag(-Wstrict-overflow LIBUNWIND_HAS_WSTRICT_OVERFLOW_FLAG) 71 check_cxx_compiler_flag(-Wwrite-strings LIBUNWIND_HAS_WWRITE_STRINGS_FLAG) 72 check_cxx_compiler_flag(-Wchar-subscripts LIBUNWIND_HAS_WCHAR_SUBSCRIPTS_FLAG) 73 check_cxx_compiler_flag(-Wmismatched-tags LIBUNWIND_HAS_WMISMATCHED_TAGS_FLAG) 74 check_cxx_compiler_flag(-Wmissing-braces LIBUNWIND_HAS_WMISSING_BRACES_FLAG) 75 check_cxx_compiler_flag(-Wshorten-64-to-32 LIBUNWIND_HAS_WSHORTEN_64_TO_32_FLAG) 76 check_cxx_compiler_flag(-Wsign-conversion LIBUNWIND_HAS_WSIGN_CONVERSION_FLAG) 77 check_cxx_compiler_flag(-Wsign-compare LIBUNWIND_HAS_WSIGN_COMPARE_FLAG) 78 check_cxx_compiler_flag(-Wshadow LIBUNWIND_HAS_WSHADOW_FLAG) 79 check_cxx_compiler_flag(-Wconversion LIBUNWIND_HAS_WCONVERSION_FLAG) 80 check_cxx_compiler_flag(-Wnewline-eof LIBUNWIND_HAS_WNEWLINE_EOF_FLAG) 81 check_cxx_compiler_flag(-Wundef LIBUNWIND_HAS_WUNDEF_FLAG) 82 check_cxx_compiler_flag(-pedantic LIBUNWIND_HAS_PEDANTIC_FLAG) 83 check_cxx_compiler_flag(-Werror LIBUNWIND_HAS_WERROR_FLAG) 84 check_cxx_compiler_flag(-Wno-error LIBUNWIND_HAS_WNO_ERROR_FLAG) 85 check_cxx_compiler_flag(/WX LIBUNWIND_HAS_WX_FLAG) 86 check_cxx_compiler_flag(/WX- LIBUNWIND_HAS_NO_WX_FLAG) 87 check_cxx_compiler_flag(/EHsc LIBUNWIND_HAS_EHSC_FLAG) 88 check_cxx_compiler_flag(/EHs- LIBUNWIND_HAS_NO_EHS_FLAG) 89 check_cxx_compiler_flag(/EHa- LIBUNWIND_HAS_NO_EHA_FLAG) 90 check_cxx_compiler_flag(/GR- LIBUNWIND_HAS_NO_GR_FLAG) 91 check_cxx_compiler_flag(-std=c++11 LIBUNWIND_HAS_STD_CXX11) 92 93 if(LIBUNWIND_HAS_STD_CXX11) 94 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11") 95 endif() 96 97 check_library_exists(dl dladdr "" LIBUNWIND_HAS_DL_LIB) 98 check_library_exists(pthread pthread_once "" LIBUNWIND_HAS_PTHREAD_LIB) 99 100
