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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_${VARIABLE} - does the variable exists or not
#
MACRO (HDF_CHECK_TYPE_SIZE TYPE VARIABLE)
set (CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS 1)
if ("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
set (MACRO_CHECK_TYPE_SIZE_FLAGS
"-DCHECK_TYPE_SIZE_TYPE=\"${TYPE}\" ${CMAKE_REQUIRED_FLAGS}"
)
foreach (def HAVE_SYS_TYPES_H HAVE_STDINT_H HAVE_STDDEF_H HAVE_INTTYPES_H)
if ("${def}")
set (MACRO_CHECK_TYPE_SIZE_FLAGS "${MACRO_CHECK_TYPE_SIZE_FLAGS} -D${def}")
endif ("${def}")
endforeach (def)
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}
${HDF_RESOURCES_EXT_DIR}/CheckTypeSize.c
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${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}/CMakeFiles/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}/CMakeFiles/CMakeError.log
"Determining size of ${TYPE} failed with the following output:\n${OUTPUT}\n\n"
)
endif (HAVE_${VARIABLE})
endif ("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
set (CMAKE_ALLOW_UNKNOWN_VARIABLE_READ_ACCESS)
ENDMACRO (HDF_CHECK_TYPE_SIZE)
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