55 lines
2.4 KiB
CMake
55 lines
2.4 KiB
CMake
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# This file is used by EnableLanguage in cmGlobalGenerator to
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# determine that that selected C compiler can actually compile
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# and link the most basic of programs. If not, a fatal error
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# is set and cmake stops processing commands and will not generate
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# any makefiles or projects.
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IF(NOT CMAKE_C_COMPILER_WORKS)
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MESSAGE(STATUS "Check for working C compiler: ${CMAKE_C_COMPILER}")
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FILE(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c
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"#ifdef __cplusplus\n"
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"# error \"The CMAKE_C_COMPILER is set to a C++ compiler\"\n"
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"#endif\n"
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"#include <stdio.h>\n"
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"#if defined(__CLASSIC_C__)\n"
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"int main(argc, argv)\n"
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" int argc;\n"
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" char* argv[];\n"
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"#else\n"
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"int main(int argc, char* argv[])\n"
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"#endif\n"
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"{ printf(\"%s\\n\", argv[0]); return argc-1;}\n")
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TRY_COMPILE(CMAKE_C_COMPILER_WORKS ${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCCompiler.c
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OUTPUT_VARIABLE OUTPUT)
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SET(C_TEST_WAS_RUN 1)
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ENDIF(NOT CMAKE_C_COMPILER_WORKS)
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IF(NOT CMAKE_C_COMPILER_WORKS)
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MESSAGE(STATUS "Check for working C compiler: ${CMAKE_C_COMPILER} -- broken")
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the C compiler works failed with "
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"the following output:\n${OUTPUT}\n\n")
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MESSAGE(FATAL_ERROR "The C compiler \"${CMAKE_C_COMPILER}\" "
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"is not able to compile a simple test program.\nIt fails "
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"with the following output:\n ${OUTPUT}\n\n"
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"CMake will not be able to correctly generate this project.")
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ELSE(NOT CMAKE_C_COMPILER_WORKS)
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IF(C_TEST_WAS_RUN)
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MESSAGE(STATUS "Check for working C compiler: ${CMAKE_C_COMPILER} -- works")
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the C compiler works passed with "
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"the following output:\n${OUTPUT}\n\n")
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ENDIF(C_TEST_WAS_RUN)
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INCLUDE (${CMAKE_ROOT}/Modules/CheckTypeSize.cmake)
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# Check the size of void*. This used to be "void *" but icc expands the *.
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CHECK_TYPE_SIZE("void*" CMAKE_SIZEOF_VOID_P)
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SET(CMAKE_C_COMPILER_WORKS 1 CACHE INTERNAL "")
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# re-configure this file CMakeCCompiler.cmake so that it gets
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# the value for CMAKE_SIZEOF_VOID_P
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# configure variables set in this file for fast reload later on
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CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCCompiler.cmake IMMEDIATE)
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ENDIF(NOT CMAKE_C_COMPILER_WORKS)
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