60 lines
2.5 KiB
CMake
60 lines
2.5 KiB
CMake
# - Check if the C source code provided in the SOURCE argument compiles.
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# CHECK_C_SOURCE_COMPILES(SOURCE VAR)
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#
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# FLAG - compiler flag to check
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# VAR - variable to store whether the source code compiled
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#
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# The following variables may be set before calling this macro to
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# modify the way the check is run:
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#
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# CMAKE_REQUIRED_FLAGS = string of compile command line flags
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# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
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# CMAKE_REQUIRED_INCLUDES = list of include directories
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# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
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MACRO(CHECK_C_COMPILER_FLAG FLAG VAR)
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IF("${VAR}" MATCHES "^${VAR}$")
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SET(MACRO_CHECK_FUNCTION_DEFINITIONS
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"${FLAG} ${CMAKE_REQUIRED_FLAGS}")
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_C_COMPILER_FLAG_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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ELSE(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_C_COMPILER_FLAG_ADD_LIBRARIES)
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ENDIF(CMAKE_REQUIRED_LIBRARIES)
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IF(CMAKE_REQUIRED_INCLUDES)
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SET(CHECK_C_COMPILER_FLAG_ADD_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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ELSE(CMAKE_REQUIRED_INCLUDES)
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SET(CHECK_C_COMPILER_FLAG_ADD_INCLUDES)
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ENDIF(CMAKE_REQUIRED_INCLUDES)
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FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
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"int main() {return 0;}\n")
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MESSAGE(STATUS "Checking if C compiler supports ${FLAG}")
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TRY_COMPILE(${VAR}
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${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
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"${CHECK_C_COMPILER_FLAG_ADD_LIBRARIES}"
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"${CHECK_C_COMPILER_FLAG_ADD_INCLUDES}"
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OUTPUT_VARIABLE OUTPUT)
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IF(${VAR})
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SET(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
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MESSAGE(STATUS "Checking if C compiler supports ${FLAG} - Success")
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Performing C SOURCE FILE Test ${VAR} succeded with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n")
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ELSE(${VAR})
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MESSAGE(STATUS "Checking if C compiler supports ${FLAG} - Failed")
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SET(${VAR} "" CACHE INTERNAL "Test ${VAR}")
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Performing C SOURCE FILE Test ${VAR} failed with the following output:\n"
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"${OUTPUT}\n"
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"Source file was:\n${SOURCE}\n")
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ENDIF(${VAR})
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ENDIF("${VAR}" MATCHES "^${VAR}$")
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ENDMACRO(CHECK_C_COMPILER_FLAG)
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