70 lines
3.3 KiB
CMake
70 lines
3.3 KiB
CMake
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#=============================================================================
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# Copyright 2003-2009 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 distributed this file outside of CMake, substitute the full
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# License text for the above reference.)
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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_CXX_COMPILER_WORKS)
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MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER}")
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FILE(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
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"#ifndef __cplusplus\n"
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"# error \"The CMAKE_CXX_COMPILER is set to a C compiler\"\n"
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"#endif\n"
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"int main(){return 0;}\n")
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TRY_COMPILE(CMAKE_CXX_COMPILER_WORKS ${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
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OUTPUT_VARIABLE OUTPUT)
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SET(CXX_TEST_WAS_RUN 1)
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ENDIF(NOT CMAKE_CXX_COMPILER_WORKS)
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IF(NOT CMAKE_CXX_COMPILER_WORKS)
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MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER} -- broken")
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# if the compiler is broken make sure to remove the platform file
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# since Windows-cl configures both c/cxx files both need to be removed
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# when c or c++ fails
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FILE(REMOVE ${CMAKE_PLATFORM_ROOT_BIN}/CMakeCPlatform.cmake )
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FILE(REMOVE ${CMAKE_PLATFORM_ROOT_BIN}/CMakeCXXPlatform.cmake )
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the CXX 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_CXX_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_CXX_COMPILER_WORKS)
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IF(CXX_TEST_WAS_RUN)
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MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER} -- works")
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the CXX compiler works passed with "
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"the following output:\n${OUTPUT}\n\n")
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ENDIF(CXX_TEST_WAS_RUN)
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SET(CMAKE_CXX_COMPILER_WORKS 1 CACHE INTERNAL "")
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IF(CMAKE_CXX_COMPILER_FORCED)
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# The compiler configuration was forced by the user.
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# Assume the user has configured all compiler information.
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ELSE(CMAKE_CXX_COMPILER_FORCED)
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# Try to identify the ABI and configure it into CMakeCXXCompiler.cmake
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INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
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CMAKE_DETERMINE_COMPILER_ABI(CXX ${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp)
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CONFIGURE_FILE(
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${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCXXCompiler.cmake
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@ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
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)
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ENDIF(CMAKE_CXX_COMPILER_FORCED)
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ENDIF(NOT CMAKE_CXX_COMPILER_WORKS)
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