mirror of
https://github.com/reactos/CMake.git
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e0890d03a4
Add properties and variables corresponding to CXX equivalents. Add features for c_function_prototypes (C90), c_restrict (C99), c_variadic_macros (C99) and c_static_assert (C11). This feature set can be extended later. Add a <PREFIX>_RESTRICT symbol define to WriteCompilerDetectionHeader to conditionally represent the c_restrict feature.
97 lines
3.6 KiB
CMake
97 lines
3.6 KiB
CMake
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#=============================================================================
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# Copyright 2003-2012 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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if(CMAKE_C_COMPILER_FORCED)
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# The compiler configuration was forced by the user.
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# Assume the user has configured all compiler information.
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set(CMAKE_C_COMPILER_WORKS TRUE)
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return()
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endif()
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include(CMakeTestCompilerCommon)
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# Remove any cached result from an older CMake version.
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# We now store this in CMakeCCompiler.cmake.
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unset(CMAKE_C_COMPILER_WORKS CACHE)
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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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PrintTestCompilerStatus("C" "")
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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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"#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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"{ (void)argv; 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 __CMAKE_C_COMPILER_OUTPUT)
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# Move result from cache to normal variable.
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set(CMAKE_C_COMPILER_WORKS ${CMAKE_C_COMPILER_WORKS})
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unset(CMAKE_C_COMPILER_WORKS CACHE)
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set(C_TEST_WAS_RUN 1)
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endif()
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if(NOT CMAKE_C_COMPILER_WORKS)
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PrintTestCompilerStatus("C" " -- 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${__CMAKE_C_COMPILER_OUTPUT}\n\n")
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message(FATAL_ERROR "The C compiler \"${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 ${__CMAKE_C_COMPILER_OUTPUT}\n\n"
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"CMake will not be able to correctly generate this project.")
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else()
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if(C_TEST_WAS_RUN)
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PrintTestCompilerStatus("C" " -- 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${__CMAKE_C_COMPILER_OUTPUT}\n\n")
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endif()
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# Try to identify the ABI and configure it into CMakeCCompiler.cmake
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include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
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CMAKE_DETERMINE_COMPILER_ABI(C ${CMAKE_ROOT}/Modules/CMakeCCompilerABI.c)
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# Try to identify the compiler features
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include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake)
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CMAKE_DETERMINE_COMPILE_FEATURES(C)
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# Re-configure to save learned information.
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configure_file(
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${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in
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${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake
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@ONLY
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)
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include(${CMAKE_PLATFORM_INFO_DIR}/CMakeCCompiler.cmake)
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if(CMAKE_C_SIZEOF_DATA_PTR)
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foreach(f ${CMAKE_C_ABI_FILES})
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include(${f})
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endforeach()
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unset(CMAKE_C_ABI_FILES)
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endif()
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endif()
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unset(__CMAKE_C_COMPILER_OUTPUT)
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