derek.holloway
7502bf64a4
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74 lines
2.5 KiB
CMake
74 lines
2.5 KiB
CMake
include(CMakePushCheckState)
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include(CheckCCompilerFlag)
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include(CheckCXXCompilerFlag)
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include(CheckLibraryExists)
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include(LLVMCheckCompilerLinkerFlag)
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include(CheckSymbolExists)
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include(CheckCSourceCompiles)
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# The compiler driver may be implicitly trying to link against libunwind, which
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# might not work if libunwind doesn't exist yet. Try to check if
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# --unwindlib=none is supported, and use that if possible.
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llvm_check_compiler_linker_flag(C "--unwindlib=none" CXX_SUPPORTS_UNWINDLIB_EQ_NONE_FLAG)
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if (HAIKU)
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check_library_exists(root fopen "" LIBUNWIND_HAS_ROOT_LIB)
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else()
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check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB)
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endif()
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if (NOT LIBUNWIND_USE_COMPILER_RT)
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if (ANDROID)
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check_library_exists(gcc __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_LIB)
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else ()
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check_library_exists(gcc_s __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_S_LIB)
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check_library_exists(gcc __absvdi2 "" LIBUNWIND_HAS_GCC_LIB)
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endif ()
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endif()
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if (CXX_SUPPORTS_NOSTDLIBXX_FLAG OR C_SUPPORTS_NODEFAULTLIBS_FLAG)
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if (CMAKE_C_FLAGS MATCHES -fsanitize OR CMAKE_CXX_FLAGS MATCHES -fsanitize)
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set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fno-sanitize=all")
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endif ()
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if (CMAKE_C_FLAGS MATCHES -fsanitize-coverage OR CMAKE_CXX_FLAGS MATCHES -fsanitize-coverage)
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set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -fsanitize-coverage=0")
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endif ()
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endif ()
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# Check compiler pragmas
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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cmake_push_check_state()
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set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror=unknown-pragmas")
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check_c_source_compiles("
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#pragma comment(lib, \"c\")
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int main(void) { return 0; }
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" C_SUPPORTS_COMMENT_LIB_PRAGMA)
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cmake_pop_check_state()
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endif()
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# Check compiler flags
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check_cxx_compiler_flag(-nostdinc++ CXX_SUPPORTS_NOSTDINCXX_FLAG)
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# Check symbols
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check_symbol_exists(__arm__ "" LIBUNWIND_TARGET_ARM)
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check_symbol_exists(__USING_SJLJ_EXCEPTIONS__ "" LIBUNWIND_USES_SJLJ_EXCEPTIONS)
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check_symbol_exists(__ARM_DWARF_EH__ "" LIBUNWIND_USES_DWARF_EH)
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if(LIBUNWIND_TARGET_ARM AND NOT LIBUNWIND_USES_SJLJ_EXCEPTIONS AND NOT LIBUNWIND_USES_DWARF_EH)
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# This condition is copied from __libunwind_config.h
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set(LIBUNWIND_USES_ARM_EHABI ON)
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endif()
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# Check libraries
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if(FUCHSIA)
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set(LIBUNWIND_HAS_DL_LIB NO)
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set(LIBUNWIND_HAS_PTHREAD_LIB NO)
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else()
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check_library_exists(dl dladdr "" LIBUNWIND_HAS_DL_LIB)
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check_library_exists(pthread pthread_once "" LIBUNWIND_HAS_PTHREAD_LIB)
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endif()
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if(HAIKU)
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check_library_exists(bsd dl_iterate_phdr "" LIBUNWIND_HAS_BSD_LIB)
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endif()
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