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# This module perdorms several try-compiles to determine the default integer
# size being used by the fortran compiler
#
# After execution, the following variables are set. If they are un set then
# size detection was not possible
#
# SIZEOF_INTEGER - Number of bytes used to store the default INTEGER type
# SIZEOF_REAL - Number of bytes used to store the default REAL type
# SIZEOF_LOGICAL - Number of bytes used to store the default LOGICAL type
# SIZEOF_CHARACTER - Number of bytes used to store the default CHARACTER type
#
#=============================================================================
# Author: Chuck Atkins
# Copyright 2011
#=============================================================================
# Check the size of a single fortran type
macro( _CHECK_FORTRAN_TYPE_SIZE _TYPE_NAME _TEST_SIZES )
foreach( __TEST_SIZE ${_TEST_SIZES} )
set( __TEST_FILE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortran${_TYPE_NAME}Size${__TEST_SIZE}.f90 )
file( WRITE ${__TEST_FILE}
"
PROGRAM check_size
${_TYPE_NAME}*${__TEST_SIZE}, TARGET :: a
${_TYPE_NAME}, POINTER :: pa
pa => a
END PROGRAM
")
try_compile( SIZEOF_${_TYPE_NAME} ${CMAKE_BINARY_DIR} ${__TEST_FILE} )
if( SIZEOF_${_TYPE_NAME} )
message( STATUS "Testing default ${_TYPE_NAME}*${__TEST_SIZE} - found" )
set( SIZEOF_${_TYPE_NAME} ${__TEST_SIZE} CACHE INTERNAL "Size of the default ${_TYPE_NAME} type" FORCE )
break()
else()
message( STATUS "Testing default ${_TYPE_NAME}*${__TEST_SIZE} -" )
endif()
endforeach()
endmacro()
macro( CHECK_FORTRAN_TYPE_SIZES )
if( NOT CMAKE_Fortran_COMPILER_SUPPORTS_F90 )
message( FATAL_ERROR "Type size tests require Fortran 90 support" )
endif()
_CHECK_FORTRAN_TYPE_SIZE( "INTEGER" "2;4;8;16" )
_CHECK_FORTRAN_TYPE_SIZE( "REAL" "4;8;12;16" )
_CHECK_FORTRAN_TYPE_SIZE( "LOGICAL" "1;2;4;8;16" )
_CHECK_FORTRAN_TYPE_SIZE( "CHARACTER" "1;2;4;8;16" )
endmacro()
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