@conf
def fortran_modifier_darwin(conf):
    """
	Defines Fortran flags and extensions for OSX systems
	"""
    v = conf.env
    v.FCFLAGS_fcshlib = ['-fPIC']
    v.LINKFLAGS_fcshlib = ['-dynamiclib']
    v.fcshlib_PATTERN = 'lib%s.dylib'
    v.FRAMEWORKPATH_ST = '-F%s'
    v.FRAMEWORK_ST = ['-framework']
    v.LINKFLAGS_fcstlib = []
    v.FCSHLIB_MARKER = ''
    v.FCSTLIB_MARKER = ''
    v.SONAME_ST = ''
