|  | include(CheckLibraryExists) | 
|  | include(CheckCXXCompilerFlag) | 
|  |  | 
|  | # Check compiler flags | 
|  | check_cxx_compiler_flag(-std=c++11              LIBCXX_HAS_STDCXX11_FLAG) | 
|  | check_cxx_compiler_flag(-std=c++1y              LIBCXX_HAS_STDCXX1Y_FLAG) | 
|  | check_cxx_compiler_flag(-fPIC                   LIBCXX_HAS_FPIC_FLAG) | 
|  | check_cxx_compiler_flag(-fno-omit-frame-pointer LIBCXX_HAS_NO_OMIT_FRAME_POINTER_FLAG) | 
|  | check_cxx_compiler_flag(-nodefaultlibs          LIBCXX_HAS_NODEFAULTLIBS_FLAG) | 
|  | check_cxx_compiler_flag(-nostdinc++             LIBCXX_HAS_NOSTDINCXX_FLAG) | 
|  | check_cxx_compiler_flag(-Wall                   LIBCXX_HAS_WALL_FLAG) | 
|  | check_cxx_compiler_flag(-W                      LIBCXX_HAS_W_FLAG) | 
|  | check_cxx_compiler_flag(-Wno-unused-parameter   LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG) | 
|  | check_cxx_compiler_flag(-Wwrite-strings         LIBCXX_HAS_WWRITE_STRINGS_FLAG) | 
|  | check_cxx_compiler_flag(-Wno-long-long          LIBCXX_HAS_WNO_LONG_LONG_FLAG) | 
|  | check_cxx_compiler_flag(-pedantic               LIBCXX_HAS_PEDANTIC_FLAG) | 
|  | check_cxx_compiler_flag(-Werror                 LIBCXX_HAS_WERROR_FLAG) | 
|  | check_cxx_compiler_flag(-Wno-error              LIBCXX_HAS_WNO_ERROR_FLAG) | 
|  | check_cxx_compiler_flag(-fno-exceptions         LIBCXX_HAS_FNO_EXCEPTIONS_FLAG) | 
|  | check_cxx_compiler_flag(-fno-rtti               LIBCXX_HAS_FNO_RTTI_FLAG) | 
|  | check_cxx_compiler_flag(/WX                     LIBCXX_HAS_WX_FLAG) | 
|  | check_cxx_compiler_flag(/WX-                    LIBCXX_HAS_NO_WX_FLAG) | 
|  | check_cxx_compiler_flag(/EHsc                   LIBCXX_HAS_EHSC_FLAG) | 
|  | check_cxx_compiler_flag(/EHs-                   LIBCXX_HAS_NO_EHS_FLAG) | 
|  | check_cxx_compiler_flag(/EHa-                   LIBCXX_HAS_NO_EHA_FLAG) | 
|  | check_cxx_compiler_flag(/GR-                    LIBCXX_HAS_NO_GR_FLAG) | 
|  |  | 
|  | # Check libraries | 
|  | check_library_exists(pthread pthread_create "" LIBCXX_HAS_PTHREAD_LIB) | 
|  | check_library_exists(c printf "" LIBCXX_HAS_C_LIB) | 
|  | check_library_exists(m ccos "" LIBCXX_HAS_M_LIB) | 
|  | check_library_exists(rt clock_gettime "" LIBCXX_HAS_RT_LIB) | 
|  | check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXX_HAS_GCC_S_LIB) | 
|  |  |