ENH: We need this for the new version of Curl. Once CMake 2.2 is released, this can go out.

This commit is contained in:
Andy Cedilnik 2004-10-05 09:04:58 -04:00
parent c86e9f5b3e
commit dcaf523a7d
2 changed files with 85 additions and 0 deletions

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#ifdef CHECK_TYPE_SIZE_TYPE
@CHECK_TYPE_SIZE_PREINCLUDE@
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif /* HAVE_SYS_TYPES_H */
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif /* HAVE_STDINT_H */
#ifdef HAVE_STDDEF_H
# include <stddef.h>
#endif /* HAVE_STDDEF_H */
@CHECK_TYPE_SIZE_PREMAIN@
#ifdef __CLASSIC_C__
int main(){
int ac;
char*av[];
#else
int main(int ac, char*av[]){
#endif
if(ac > 1000){return *av[0];}
return sizeof(CHECK_TYPE_SIZE_TYPE);
}
#else /* CHECK_TYPE_SIZE_TYPE */
# error "CHECK_TYPE_SIZE_TYPE has to specify the type"
#endif /* CHECK_TYPE_SIZE_TYPE */

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#
# Check if the type exists and determine size of type. if the type
# exists, the size will be stored to the variable.
#
# CHECK_TYPE_SIZE - macro which checks the size of type
# VARIABLE - variable to store size if the type exists.
# HAVE_${VARIABLE} - does the variable exists or not
#
MACRO(CHECK_TYPE_SIZE TYPE VARIABLE)
SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1)
IF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
SET(MACRO_CHECK_TYPE_SIZE_FLAGS
"-DCHECK_TYPE_SIZE_TYPE=\"${TYPE}\" ${CMAKE_REQUIRED_FLAGS}")
FOREACH(def HAVE_SYS_TYPES_H HAVE_STDINT_H HAVE_STDDEF_H)
IF("${def}")
SET(MACRO_CHECK_TYPE_SIZE_FLAGS
"${MACRO_CHECK_TYPE_SIZE_FLAGS} -D${def}")
ENDIF("${def}")
ENDFOREACH(def)
SET(CHECK_TYPE_SIZE_PREMAIN)
FOREACH(def ${CMAKE_EXTRA_INCLUDE_FILES})
SET(CHECK_TYPE_SIZE_PREMAIN "${CHECK_TYPE_SIZE_PREMAIN}#include \"${def}\"\n")
ENDFOREACH(def)
CONFIGURE_FILE("${CMAKE_ROOT}/Modules/CheckTypeSize.c.in"
"${CMAKE_BINARY_DIR}/CMakeTmp/CheckTypeSize.c" IMMEDIATE @ONLY)
FILE(READ "${CMAKE_BINARY_DIR}/CMakeTmp/CheckTypeSize.c"
CHECK_TYPE_SIZE_FILE_CONTENT)
MESSAGE(STATUS "Check size of ${TYPE}")
IF(CMAKE_REQUIRED_LIBRARIES)
SET(CHECK_TYPE_SIZE_ADD_LIBRARIES
"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
ENDIF(CMAKE_REQUIRED_LIBRARIES)
TRY_RUN(${VARIABLE} HAVE_${VARIABLE}
${CMAKE_BINARY_DIR}
"${CMAKE_BINARY_DIR}/CMakeTmp/CheckTypeSize.c"
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_TYPE_SIZE_FLAGS}
"${CHECK_TYPE_SIZE_ADD_LIBRARIES}"
OUTPUT_VARIABLE OUTPUT)
IF(HAVE_${VARIABLE})
MESSAGE(STATUS "Check size of ${TYPE} - done")
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
"Determining size of ${TYPE} passed with the following output:\n${OUTPUT}\n\n")
ELSE(HAVE_${VARIABLE})
MESSAGE(STATUS "Check size of ${TYPE} - failed")
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
"Determining size of ${TYPE} failed with the following output:\n${OUTPUT}\nCheckTypeSize.c:\n${CHECK_TYPE_SIZE_FILE_CONTENT}\n\n")
ENDIF(HAVE_${VARIABLE})
ENDIF("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
SET(CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS )
ENDMACRO(CHECK_TYPE_SIZE)