| # - Check whether the C compiler supports a given flag. |
| # CHECK_C_COMPILER_FLAG(<flag> <var>) |
| # <flag> - the compiler flag |
| # <var> - variable to store the result |
| # This internally calls the check_c_source_compiles macro. |
| # See help for CheckCSourceCompiles for a listing of variables |
| # that can modify the build. |
| |
| #============================================================================= |
| # Copyright 2006-2010 Kitware, Inc. |
| # Copyright 2006 Alexander Neundorf <neundorf@kde.org> |
| # |
| # Distributed under the OSI-approved BSD License (the "License"); |
| # see accompanying file Copyright.txt for details. |
| # |
| # This software is distributed WITHOUT ANY WARRANTY; without even the |
| # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| # See the License for more information. |
| #============================================================================= |
| # (To distribute this file outside of CMake, substitute the full |
| # License text for the above reference.) |
| |
| INCLUDE(CheckCSourceCompiles) |
| |
| MACRO (CHECK_C_COMPILER_FLAG _FLAG _RESULT) |
| SET(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}") |
| SET(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}") |
| CHECK_C_SOURCE_COMPILES("int main(void) { return 0; }" ${_RESULT} |
| # Some compilers do not fail with a bad flag |
| FAIL_REGEX "unrecognized .*option" # GNU |
| FAIL_REGEX "ignoring unknown option" # MSVC |
| FAIL_REGEX "warning D9002" # MSVC, any lang |
| FAIL_REGEX "[Uu]nknown option" # HP |
| FAIL_REGEX "[Ww]arning: [Oo]ption" # SunPro |
| FAIL_REGEX "command option .* is not recognized" # XL |
| ) |
| SET (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}") |
| ENDMACRO (CHECK_C_COMPILER_FLAG) |
| |
