Use '-f' instead of '--file' to be more accommodating to OS X awk

diff --git a/interpreters/nitfol/Makefile.am b/interpreters/nitfol/Makefile.am
index 23b9398f5c5588a5a2a17929899653565521019b..ccb415ab3cb255cdde0601bb9fb0ca51546620dd 100644 (file)
--- a/interpreters/nitfol/Makefile.am
+++ b/interpreters/nitfol/Makefile.am
@@ -41,7 +41,7 @@ dbg_help.texi: inform.y y2help.pl
        $(PERL) $(srcdir)/y2help.pl $(srcdir)/inform.y
 
 copying.c: COPYING copying.awk
-       $(AWK) --file $(srcdir)/copying.awk <$(srcdir)/COPYING >copying.c
+       $(AWK) -f $(srcdir)/copying.awk <$(srcdir)/COPYING >copying.c
 
 # nitfol.6: nitfol.opt opt2glkc.pl
 #      $(PERL) $(srcdir)/opt2glkc.pl -man $(srcdir)/nitfol.opt