%% Regarding Re: Circular dependency dropping error; you wrote:
ch> % ls -la asdf.gif
ch> asdf.gif
ch> % make asdf.png
ch> make: *** No rule to make target `asdf.png'. Stop.
>> This is correct, right?
ch> No, there is a rule for %.png <- %.ppm, and a rule for %.ppm <-
ch> %.gif. %.png <- %.gif should have worked. This does work for
ch> %.png <- %.xpm, as seen later, and the rules are identical.
Not in the makefile you sent in your message. There's a target %.gif
that can be built from %.ppm, but there's no implicit rule that shows
how to build anything (including %.ppm) from %.gif.
Either you overlooked it, or the makefile I received got truncated
somehow.
ch> Anyway, yes, perhaps I'm stretching 'make' too far, but I'm strongly
ch> encouraged by the fact that this works some of the time!
>> As far as I can tell, make works all the time when it should work.
>> What is broken is that in some situations where make can't do what
>> you want, it will try to do something bogus instead of just
>> printing an error.
>> Am I correct here, or am I missing something?
ch> It's actually doing the right thing about half the time. I guess the
ch> code determining which dependency to drop is picking an arbitrary
ch> dependency, instead of useless dependencies.
It's not clear how make would determine "useless". What I would assume
is that make would pick the last dependency that caused the loop, and
throw it out.
--
-------------------------------------------------------------------------------
Paul D. Smith <[EMAIL PROTECTED]> 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
