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7beee2df48
FindThreads.h BUG: improve CheckC(XX)SourceRuns.cmake so that it works with cross compiling, the return value has to go in the cache but shouldn't overwrite the actual return value, and it should go only in the cache if we have a result from try_run() otherwise we won't get here again if we have a result later on Alex
74 lines
3.2 KiB
CMake
74 lines
3.2 KiB
CMake
# - Check if the source code provided in the SOURCE argument compiles and runs.
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# CHECK_C_SOURCE_RUNS(SOURCE VAR)
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# - macro which checks if the source code runs
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# SOURCE - source code to try to compile
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# VAR - variable to store the result, 1 for success, empty for failure
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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_SOURCE_RUNS SOURCE VAR)
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IF("${VAR}" MATCHES "^${VAR}$")
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SET(MACRO_CHECK_FUNCTION_DEFINITIONS
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"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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ELSE(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_C_SOURCE_COMPILES_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_SOURCE_COMPILES_ADD_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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ELSE(CMAKE_REQUIRED_INCLUDES)
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SET(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES)
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ENDIF(CMAKE_REQUIRED_INCLUDES)
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FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
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"${SOURCE}\n")
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MESSAGE(STATUS "Performing Test ${VAR}")
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TRY_RUN(${VAR}_EXITCODE ${VAR}_COMPILED
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${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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"${CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}"
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"${CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
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COMPILE_OUTPUT_VARIABLE OUTPUT)
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# if it did not compile make the return value fail code of 1
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IF(NOT ${VAR}_COMPILED)
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SET(${VAR}_EXITCODE 1)
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ENDIF(NOT ${VAR}_COMPILED)
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# if the return value was 0 then it worked
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IF("${${VAR}_EXITCODE}" EQUAL 0)
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SET(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
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MESSAGE(STATUS "Performing Test ${VAR} - 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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"Return value: ${${VAR}}\n"
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"Source file was:\n${SOURCE}\n")
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ELSE("${${VAR}_EXITCODE}" EQUAL 0)
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IF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
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SET(${VAR} "${${VAR}_EXITCODE}")
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ELSE(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
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SET(${VAR} "" CACHE INTERNAL "Test ${VAR}")
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ENDIF(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES "FAILED_TO_RUN")
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MESSAGE(STATUS "Performing Test ${VAR} - Failed")
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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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"Return value: ${${VAR}_EXITCODE}\n"
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"Source file was:\n${SOURCE}\n")
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ENDIF("${${VAR}_EXITCODE}" EQUAL 0)
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ENDIF("${VAR}" MATCHES "^${VAR}$")
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ENDMACRO(CHECK_C_SOURCE_RUNS)
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