tdw%computer-lab.cambridge.ac.uk@NSFNET-RELAY.AC.UK (Tim Wilson) (10/10/89)
GNU Make is making my life a lot easier! And I particularly
appreciate the manual. To either correcty my understanding (tell me
on which page to RTFM!), or help improve GNU Make further, I'm
including a script which shows GNU Make committing a sin of
omission--at least, that's what I think.
Here is a session which exibits what I believe to be the bug:
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Script started on Tue Oct 10 15:26:40 1989
~/rvd/c/sys/sum $ cat GMBug
# Demonstrate bug in GNU make
# Last edited: Tue Oct 10 15:14:23 1989 by Tim Wilson
#
%.m : /tmp/z/%.n
echo $@
a.m :
~/rvd/c/sys/sum $ gmake -d -r -n -f GMBug
GNU Make version 3.56, by Richard Stallman and Roland McGrath.
Copyright (C) 1988, 1989 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Reading makefiles...
Updating makefiles....
Considering target file `GMBug'.
Looking for an implicit rule for `GMBug'.
No implicit rule found for `GMBug'.
Finished dependencies of target file `GMBug'.
No need to remake target `GMBug'.
Updating goal targets....
Considering target file `a.m'.
File `a.m' does not exist.
Looking for an implicit rule for `a.m'.
No implicit rule found for `a.m'.
Finished dependencies of target file `a.m'.
Must remake target `a.m'.
Successfully remade target file `a.m'.
~/rvd/c/sys/sum $
script done on Tue Oct 10 15:28:14 1989
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What I expected:
===============
I expected the implicit rule %.m etc to be applicable to the target a.m .
Why I think it is a bug:
=======================
(rather than mis-reading of the manual): Slight variations on the
exact form of the pattern rule do what I would expect, viz attempt to
apply the pattern rule to the target a.m . Variations which *do* work
include:
%.m : tmp/z/%.n
echo $@
(ie without the leading `/') and
%.m : /tmp/%.n
echo $@
(ie without the subdirectory `z').
Thank you for your attention.
Tim Wilson