ENH: nagfor from NAG is available on Darwin

A modern Fortran compiler nagfor from NAG is available on Darwin, as well as on Linux, since at least version 7.0

Author: dimpase

numpy/distutils/fcompiler/__init__.py

@@ -745,7 +745,7 @@ def wrap_unlinkable_objects(self, objects, output_dir, extra_dll_dir):
     ('cygwin.*', ('gnu', 'intelv', 'absoft', 'compaqv', 'intelev', 'gnu95', 'g95')),
     ('linux.*', ('gnu95', 'intel', 'lahey', 'pg', 'nv', 'absoft', 'nag', 'vast', 'compaq',
                  'intele', 'intelem', 'gnu', 'g95', 'pathf95', 'nagfor', 'fujitsu')),
-    ('darwin.*', ('gnu95', 'nag', 'absoft', 'ibm', 'intel', 'gnu', 'g95', 'pg')),
+    ('darwin.*', ('gnu95', 'nag', 'nagfor', 'absoft', 'ibm', 'intel', 'gnu', 'g95', 'pg')),
     ('sunos.*', ('sun', 'gnu', 'gnu95', 'g95')),
     ('irix.*', ('mips', 'gnu', 'gnu95',)),
     ('aix.*', ('ibm', 'gnu', 'gnu95',)),