#============================================================================= # Copyright 2003-2012 Kitware, Inc. # # 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.) if(CMAKE_C_COMPILER_FORCED) # The compiler configuration was forced by the user. # Assume the user has configured all compiler information. set(CMAKE_C_COMPILER_WORKS TRUE) return() endif() include(CMakeTestCompilerCommon) # Remove any cached result from an older CMake version. # We now store this in CMakeCCompiler.cmake. unset(CMAKE_C_COMPILER_WORKS CACHE) # This file is used by EnableLanguage in cmGlobalGenerator to # determine that that selected C compiler can actually compile # and link the most basic of programs. If not, a fatal error # is set and cmake stops processing commands and will not generate # any makefiles or projects. if(NOT CMAKE_C_COMPILER_WORKS) PrintTestCompilerStatus("C" "") file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c "#ifdef __cplusplus\n" "# error \"The CMAKE_C_COMPILER is set to a C++ compiler\"\n" "#endif\n" "#if defined(__CLASSIC_C__)\n" "int main(argc, argv)\n" " int argc;\n" " char* argv[];\n" "#else\n" "int main(int argc, char* argv[])\n" "#endif\n" "{ (void)argv; return argc-1;}\n") try_compile(CMAKE_C_COMPILER_WORKS ${CMAKE_BINARY_DIR} ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c OUTPUT_VARIABLE __CMAKE_C_COMPILER_OUTPUT) # Move result from cache to normal variable. set(CMAKE_C_COMPILER_WORKS ${CMAKE_C_COMPILER_WORKS}) unset(CMAKE_C_COMPILER_WORKS CACHE) set(C_TEST_WAS_RUN 1) endif() if(NOT CMAKE_C_COMPILER_WORKS) PrintTestCompilerStatus("C" " -- broken") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "Determining if the C compiler works failed with " "the following output:\n${__CMAKE_C_COMPILER_OUTPUT}\n\n") message(FATAL_ERROR "The C compiler \"${CMAKE_C_COMPILER}\" " "is not able to compile a simple test program.\nIt fails " "with the following output:\n ${__CMAKE_C_COMPILER_OUTPUT}\n\n" "CMake will not be able to correctly generate this project.") else() if(C_TEST_WAS_RUN) PrintTestCompilerStatus("C" " -- works") file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log "Determining if the C compiler works passed with " "the following output:\n${__CMAKE_C_COMPILER_OUTPUT}\n\n") endif() # Try to identify the ABI and configure it into CMakeCCompiler.cmake include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake) CMAKE_DETERMINE_COMPILER_ABI(C ${CMAKE_ROOT}/Modules/CMakeCCompilerABI.c) # Re-configure to save learned information. configure_file( ${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in ${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0 ) include(${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake) if(CMAKE_C_SIZEOF_DATA_PTR) foreach(f ${CMAKE_C_ABI_FILES}) include(${f}) endforeach() unset(CMAKE_C_ABI_FILES) endif() endif() unset(__CMAKE_C_COMPILER_OUTPUT)