2 # This file is used by EnableLanguage in cmGlobalGenerator to
3 # determine that that selected C++ compiler can actually compile
4 # and link the most basic of programs. If not, a fatal error
5 # is set and cmake stops processing commands and will not generate
6 # any makefiles or projects.
7 IF(NOT CMAKE_CXX_COMPILER_WORKS)
8 MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER}")
9 FILE(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
10 "#ifndef __cplusplus\n"
11 "# error \"The CMAKE_CXX_COMPILER is set to a C compiler\"\n"
13 "int main(){return 0;}\n")
14 TRY_COMPILE(CMAKE_CXX_COMPILER_WORKS ${CMAKE_BINARY_DIR}
15 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
16 OUTPUT_VARIABLE OUTPUT)
17 SET(CXX_TEST_WAS_RUN 1)
18 ENDIF(NOT CMAKE_CXX_COMPILER_WORKS)
20 IF(NOT CMAKE_CXX_COMPILER_WORKS)
21 MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER} -- broken")
22 # if the compiler is broken make sure to remove the platform file
23 # since Windows-cl configures both c/cxx files both need to be removed
25 FILE(REMOVE ${CMAKE_PLATFORM_ROOT_BIN}/CMakeCPlatform.cmake )
26 FILE(REMOVE ${CMAKE_PLATFORM_ROOT_BIN}/CMakeCXXPlatform.cmake )
27 FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
28 "Determining if the CXX compiler works failed with "
29 "the following output:\n${OUTPUT}\n\n")
30 MESSAGE(FATAL_ERROR "The C++ compiler \"${CMAKE_CXX_COMPILER}\" "
31 "is not able to compile a simple test program.\nIt fails "
32 "with the following output:\n ${OUTPUT}\n\n"
33 "CMake will not be able to correctly generate this project.")
34 ELSE(NOT CMAKE_CXX_COMPILER_WORKS)
36 MESSAGE(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER} -- works")
37 FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
38 "Determining if the CXX compiler works passed with "
39 "the following output:\n${OUTPUT}\n\n")
40 ENDIF(CXX_TEST_WAS_RUN)
41 SET(CMAKE_CXX_COMPILER_WORKS 1 CACHE INTERNAL "")
43 IF(CMAKE_CXX_COMPILER_FORCED)
44 # The compiler configuration was forced by the user.
45 # Assume the user has configured all compiler information.
46 ELSE(CMAKE_CXX_COMPILER_FORCED)
47 # Try to identify the ABI and configure it into CMakeCXXCompiler.cmake
48 INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
49 CMAKE_DETERMINE_COMPILER_ABI(CXX ${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp)
51 ${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
52 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCXXCompiler.cmake
53 @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
55 ENDIF(CMAKE_CXX_COMPILER_FORCED)
56 ENDIF(NOT CMAKE_CXX_COMPILER_WORKS)