ENH: We need this for the new version of Curl. Once CMake 2.2 is released, this can go out.
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#ifdef CHECK_TYPE_SIZE_TYPE
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@CHECK_TYPE_SIZE_PREINCLUDE@
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif /* HAVE_SYS_TYPES_H */
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#ifdef HAVE_STDINT_H
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# include <stdint.h>
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#endif /* HAVE_STDINT_H */
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#ifdef HAVE_STDDEF_H
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# include <stddef.h>
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#endif /* HAVE_STDDEF_H */
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@CHECK_TYPE_SIZE_PREMAIN@
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#ifdef __CLASSIC_C__
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int main(){
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int ac;
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char*av[];
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#else
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int main(int ac, char*av[]){
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#endif
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if(ac > 1000){return *av[0];}
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return sizeof(CHECK_TYPE_SIZE_TYPE);
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}
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#else /* CHECK_TYPE_SIZE_TYPE */
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# error "CHECK_TYPE_SIZE_TYPE has to specify the type"
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#endif /* CHECK_TYPE_SIZE_TYPE */
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#
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# Check if the type exists and determine size of type. if the type
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# exists, the size will be stored to the variable.
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#
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# CHECK_TYPE_SIZE - macro which checks the size of type
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# VARIABLE - variable to store size if the type exists.
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# HAVE_${VARIABLE} - does the variable exists or not
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#
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MACRO(CHECK_TYPE_SIZE TYPE VARIABLE)
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SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1)
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IF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
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SET(MACRO_CHECK_TYPE_SIZE_FLAGS
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"-DCHECK_TYPE_SIZE_TYPE=\"${TYPE}\" ${CMAKE_REQUIRED_FLAGS}")
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FOREACH(def HAVE_SYS_TYPES_H HAVE_STDINT_H HAVE_STDDEF_H)
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IF("${def}")
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SET(MACRO_CHECK_TYPE_SIZE_FLAGS
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"${MACRO_CHECK_TYPE_SIZE_FLAGS} -D${def}")
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ENDIF("${def}")
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ENDFOREACH(def)
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SET(CHECK_TYPE_SIZE_PREMAIN)
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FOREACH(def ${CMAKE_EXTRA_INCLUDE_FILES})
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SET(CHECK_TYPE_SIZE_PREMAIN "${CHECK_TYPE_SIZE_PREMAIN}#include \"${def}\"\n")
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ENDFOREACH(def)
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CONFIGURE_FILE("${CMAKE_ROOT}/Modules/CheckTypeSize.c.in"
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"${CMAKE_BINARY_DIR}/CMakeTmp/CheckTypeSize.c" IMMEDIATE @ONLY)
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FILE(READ "${CMAKE_BINARY_DIR}/CMakeTmp/CheckTypeSize.c"
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CHECK_TYPE_SIZE_FILE_CONTENT)
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MESSAGE(STATUS "Check size of ${TYPE}")
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_TYPE_SIZE_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
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ENDIF(CMAKE_REQUIRED_LIBRARIES)
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TRY_RUN(${VARIABLE} HAVE_${VARIABLE}
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${CMAKE_BINARY_DIR}
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"${CMAKE_BINARY_DIR}/CMakeTmp/CheckTypeSize.c"
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CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_TYPE_SIZE_FLAGS}
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"${CHECK_TYPE_SIZE_ADD_LIBRARIES}"
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OUTPUT_VARIABLE OUTPUT)
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IF(HAVE_${VARIABLE})
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MESSAGE(STATUS "Check size of ${TYPE} - done")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
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"Determining size of ${TYPE} passed with the following output:\n${OUTPUT}\n\n")
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ELSE(HAVE_${VARIABLE})
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MESSAGE(STATUS "Check size of ${TYPE} - failed")
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FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
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"Determining size of ${TYPE} failed with the following output:\n${OUTPUT}\nCheckTypeSize.c:\n${CHECK_TYPE_SIZE_FILE_CONTENT}\n\n")
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ENDIF(HAVE_${VARIABLE})
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ENDIF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
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SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS )
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ENDMACRO(CHECK_TYPE_SIZE)
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