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Re: problem with yacc implicit rule
From: |
Paul D. Smith |
Subject: |
Re: problem with yacc implicit rule |
Date: |
Mon, 26 Nov 2001 10:19:27 -0500 |
%% Crni Gorac <address@hidden> writes:
cg> Am working on library foo that is using yacc for parsing; got
cg> foo.y file in project, however I have also unrelated foo.c file in
cg> project. So I have rules in my makefile to create y.tab.c file
cg> from foo.y, as well as library from y.tab.c and foo.c files.
cg> However, henever foo.y is newer from foo.c, make is trying to
cg> regenerate foo.c from foo.y. Now, I understand that this is
cg> because of implicit make rule for .y files, but I'm wondering what
cg> is proper way to avoid this behavior.
Remove the default implicit rule.
See the GNU make manual, section "Canceling Implicit Rules".
You can see a complete catalog of default rules by running this command
(on UNIX, anyway):
$ make -pf/dev/null
--
-------------------------------------------------------------------------------
Paul D. Smith <address@hidden> Find some GNU make tips at:
http://www.gnu.org http://www.paulandlesley.org/gmake/
"Please remain calm...I may be mad, but I am a professional." --Mad Scientist