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#=============================================================================
# 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")
# if the compiler is broken make sure to remove the platform file
# since Windows-cl configures both c/cxx files both need to be removed
# when c or c++ fails
file(REMOVE ${CMAKE_PLATFORM_INFO_DIR}/CMakeCPlatform.cmake )
file(REMOVE ${CMAKE_PLATFORM_INFO_DIR}/CMakeCXXPlatform.cmake )
message(FATAL_ERROR "The C compiler \"${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)
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