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# (c) https://github.com/dev-cafe/autocmake/blob/master/AUTHORS.md
# licensed under BSD-3: https://github.com/dev-cafe/autocmake/blob/master/LICENSE
#.rst:
#
# Enables 64-bit integer support for Fortran projects.
#
# Variables modified (provided the corresponding language is enabled)::
#
# CMAKE_Fortran_FLAGS
#
# autocmake.yml configuration::
#
# docopt: "--int64 Enable 64bit integers [default: False]."
# define: "'-DENABLE_64BIT_INTEGERS={0}'.format(arguments['--int64'])"
option(ENABLE_64BIT_INTEGERS "Enable 64-bit integers" OFF)
if(ENABLE_64BIT_INTEGERS)
if(DEFINED CMAKE_Fortran_COMPILER_ID)
if(CMAKE_Fortran_COMPILER_ID MATCHES GNU)
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fdefault-integer-8")
endif()
if(CMAKE_Fortran_COMPILER_ID MATCHES Intel)
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -i8")
endif()
if(CMAKE_Fortran_COMPILER_ID MATCHES PGI)
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -i8")
endif()
if(CMAKE_Fortran_COMPILER_ID MATCHES XL)
set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -qintsize=8 -q64")
endif()
endif()
endif()
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