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#
# Copyright (c) 2007-2010 High Performance Computing Center Stuttgart,
# University of Stuttgart. All rights reserved.
# $COPYRIGHT$
#
# Additional copyrights may follow
#
# $HEADER$
#
MACRO(C_GET_ALIGNMENT TYPE LANG NAME)
IF(NOT OPAL_ALIGNMENT_${NAME})
#
# Try to compile and run a foo grogram.
# The alignment result will be stored in ${CHECK_TYPE}_ALIGNMENT
#
MESSAGE( STATUS "Check alignment of ${TYPE} in ${LANG}...")
SET(INCLUDE_HEADERS "#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>")
IF(HAVE_STDINT_H)
SET(INCLUDE_HEADERS "${INCLUDE_HEADERS}\n#include <stdint.h>\n")
ENDIF(HAVE_STDINT_H)
FILE (WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/c_get_${NAME}_alignment.${LANG}"
"${INCLUDE_HEADERS}
int main(){
char diff;
struct foo {char a; ${TYPE} b;};
struct foo *p = (struct foo *) malloc(sizeof(struct foo));
diff = ((char *)&p->b) - ((char *)&p->a);
return diff;}
")
TRY_RUN(OPAL_ALIGNMENT_${NAME} COMPILE_RESULT "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/"
"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/c_get_${NAME}_alignment.${LANG}")
MESSAGE( STATUS "Check alignment of ${TYPE} in ${LANG}...${OPAL_ALIGNMENT_${NAME}}")
ENDIF(NOT OPAL_ALIGNMENT_${NAME})
ENDMACRO(C_GET_ALIGNMENT TYPE TYPE_ALIGNMENT LANG )
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