%% gk <[EMAIL PROTECTED]> writes:
g> At 08:12 AM 11/9/2002 -0500, Paul D. Smith wrote:
g> %:: RCS/%,v
g> %:: RCS/%
g> %:: s.%
g> %:: SCCS/s.%
>> >> You can delete pattern rules. See the GNU make manual, section
>> >> "Canceling Implicit Rules".
g> That section only says how to cancel rules that have commands by
g> writing a rule without commands. The manual does not seem to
g> address how to cancel implicit rules that have no commands.
>> I don't understand your comment. All the above rules have
>> commands. There aren't any pattern rules without commands.
g> What are the commands?
Right here:
$ make -p -f/dev/null
...
%:: %,v
# commands to execute (built-in):
$(CHECKOUT,v)
%:: RCS/%,v
# commands to execute (built-in):
$(CHECKOUT,v)
%:: RCS/%
# commands to execute (built-in):
$(CHECKOUT,v)
%:: s.%
# commands to execute (built-in):
$(GET) $(GFLAGS) $(SCCS_OUTPUT_OPTION) $<
%:: SCCS/s.%
# commands to execute (built-in):
$(GET) $(GFLAGS) $(SCCS_OUTPUT_OPTION) $<
...
See the commands? Things like "$(CHECKOUT,v)", etc.?
g> They look like what the manual calls "terminal double-colon rules"
Yes, they are... and?
g> You previously wrote:
>> If you use "make -p -f/dev/null" you can tell which rules will and won't
>> be removed by clearing .SUFFIXES prerequisite list fairly easily: any
g> That is where I got the rules for RCS, SCCS.
Me too :).
g> I do not want make to waste time and clutter my debug output
g> searching for RCS and SCCS files since I don't have any.
g> I quote from the manual:
> For example, the built-in implicit rules for extracting sources from
> RCS and SCCS files are terminal; as a result, if the file `foo.c,v'
> does not exist, `make' will not even consider trying to make it as
> an intermediate file from `foo.c,v.o' or from `RCS/SCCS/s.foo.c,v'.
> RCS and SCCS files are generally ultimate source files, which should
> not be remade from any other files; therefore, `make' can save time
> by not looking for ways to remake them.
It's all good.
--
-------------------------------------------------------------------------------
Paul D. Smith <[EMAIL PROTECTED]> Find some GNU make tips at:
http://www.gnu.org http://make.paulandlesley.org
"Please remain calm...I may be mad, but I am a professional." --Mad Scientist
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