f7eb5738f6
libcxx doesn't build with -Werror because of #warnings in its source code. But when libcxx is built as an external LLVM project, it inherits LLVM build flags, breaking the build if LLVM_ENABLE_WERROR is enabled. git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@191814 91177308-0d34-0410-b5e6-96231b3b80d8
41 lines
2.0 KiB
CMake
41 lines
2.0 KiB
CMake
include(CheckLibraryExists)
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include(CheckCXXCompilerFlag)
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# Check compiler flags
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check_cxx_compiler_flag(-std=c++0x LIBCXX_HAS_STDCXX0X_FLAG)
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check_cxx_compiler_flag(-fPIC LIBCXX_HAS_FPIC_FLAG)
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check_cxx_compiler_flag(-nodefaultlibs LIBCXX_HAS_NODEFAULTLIBS_FLAG)
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check_cxx_compiler_flag(-nostdinc++ LIBCXX_HAS_NOSTDINCXX_FLAG)
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check_cxx_compiler_flag(-Wall LIBCXX_HAS_WALL_FLAG)
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check_cxx_compiler_flag(-W LIBCXX_HAS_W_FLAG)
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check_cxx_compiler_flag(-Wno-unused-parameter LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG)
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check_cxx_compiler_flag(-Wwrite-strings LIBCXX_HAS_WWRITE_STRINGS_FLAG)
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check_cxx_compiler_flag(-Wno-long-long LIBCXX_HAS_WNO_LONG_LONG_FLAG)
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check_cxx_compiler_flag(-pedantic LIBCXX_HAS_PEDANTIC_FLAG)
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check_cxx_compiler_flag(-Werror LIBCXX_HAS_WERROR_FLAG)
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check_cxx_compiler_flag(-Wno-error LIBCXX_HAS_WNO_ERROR_FLAG)
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check_cxx_compiler_flag(-fno-exceptions LIBCXX_HAS_FNO_EXCEPTIONS_FLAG)
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check_cxx_compiler_flag(-fno-rtti LIBCXX_HAS_FNO_RTTI_FLAG)
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check_cxx_compiler_flag(/WX LIBCXX_HAS_WX_FLAG)
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check_cxx_compiler_flag(/WX- LIBCXX_HAS_NO_WX_FLAG)
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check_cxx_compiler_flag(/EHsc LIBCXX_HAS_EHSC_FLAG)
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check_cxx_compiler_flag(/EHs- LIBCXX_HAS_NO_EHS_FLAG)
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check_cxx_compiler_flag(/EHa- LIBCXX_HAS_NO_EHA_FLAG)
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check_cxx_compiler_flag(/GR- LIBCXX_HAS_NO_GR_FLAG)
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# Check libraries
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check_library_exists(pthread pthread_create "" LIBCXX_HAS_PTHREAD_LIB)
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check_library_exists(c printf "" LIBCXX_HAS_C_LIB)
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check_library_exists(m ccos "" LIBCXX_HAS_M_LIB)
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check_library_exists(rt clock_gettime "" LIBCXX_HAS_RT_LIB)
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check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB)
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# Check C++0x features
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if (LIBCXX_ENABLE_CXX0X)
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if (LIBCXX_HAS_STDCXX0X_FLAG)
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set(CMAKE_REQUIRED_DEFINITIONS -std=c++0x)
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endif()
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else()
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set(LIBCXX_HAS_STDCXX0X_FLAG FALSE)
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endif()
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