74 lines · plain
1include(CMakePushCheckState)2include(CheckCCompilerFlag)3include(CheckCXXCompilerFlag)4include(CheckLibraryExists)5include(LLVMCheckCompilerLinkerFlag)6include(CheckSymbolExists)7include(CheckCSourceCompiles)8 9# The compiler driver may be implicitly trying to link against libunwind, which10# might not work if libunwind doesn't exist yet. Try to check if11# --unwindlib=none is supported, and use that if possible.12llvm_check_compiler_linker_flag(C "--unwindlib=none" CXX_SUPPORTS_UNWINDLIB_EQ_NONE_FLAG)13 14if (HAIKU)15 check_library_exists(root fopen "" LIBUNWIND_HAS_ROOT_LIB)16else()17 check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB)18endif()19 20if (NOT LIBUNWIND_USE_COMPILER_RT)21 if (ANDROID)22 check_library_exists(gcc __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_LIB)23 else ()24 check_library_exists(gcc_s __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_S_LIB)25 check_library_exists(gcc __absvdi2 "" LIBUNWIND_HAS_GCC_LIB)26 endif ()27endif()28 29if (CXX_SUPPORTS_NOSTDLIBXX_FLAG OR C_SUPPORTS_NODEFAULTLIBS_FLAG)30 if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize)31 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all")32 endif ()33 if (CMAKE_C_FLAGS MATCHES -fsanitize-coverage OR CMAKE_CXX_FLAGS MATCHES -fsanitize-coverage)34 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fsanitize-coverage=0")35 endif ()36endif ()37 38# Check compiler pragmas39if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")40 cmake_push_check_state()41 set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror=unknown-pragmas")42 check_c_source_compiles("43#pragma comment(lib, \"c\")44int main(void) { return 0; }45" C_SUPPORTS_COMMENT_LIB_PRAGMA)46 cmake_pop_check_state()47endif()48 49# Check compiler flags50check_cxx_compiler_flag(-nostdinc++ CXX_SUPPORTS_NOSTDINCXX_FLAG)51 52# Check symbols53check_symbol_exists(__arm__ "" LIBUNWIND_TARGET_ARM)54check_symbol_exists(__USING_SJLJ_EXCEPTIONS__ "" LIBUNWIND_USES_SJLJ_EXCEPTIONS)55check_symbol_exists(__ARM_DWARF_EH__ "" LIBUNWIND_USES_DWARF_EH)56 57if(LIBUNWIND_TARGET_ARM AND NOT LIBUNWIND_USES_SJLJ_EXCEPTIONS AND NOT LIBUNWIND_USES_DWARF_EH)58 # This condition is copied from __libunwind_config.h59 set(LIBUNWIND_USES_ARM_EHABI ON)60endif()61 62# Check libraries63if(FUCHSIA)64 set(LIBUNWIND_HAS_DL_LIB NO)65 set(LIBUNWIND_HAS_PTHREAD_LIB NO)66else()67 check_library_exists(dl dladdr "" LIBUNWIND_HAS_DL_LIB)68 check_library_exists(pthread pthread_once "" LIBUNWIND_HAS_PTHREAD_LIB)69endif()70 71if(HAIKU)72 check_library_exists(bsd dl_iterate_phdr "" LIBUNWIND_HAS_BSD_LIB)73endif()74