Hi!
I issued this some days ago. Now I boiled the problem down to a very
simple makefile example. It seems to me that to a pattern rule one can not
add an explicit prerequiste. Take a look at this:
%.eps:
touch $@
%.dvi: %.tex e.eps
latex $<
%.pdf: %.dvi
dvipdf $<
and say we have a file "some.tex" in the current directory:
% ls
Makefile some.tex
Then "make some.pdf" will not see the implicit rule for making the target
some.pdf:
% make -n some.pdf
tex some.tex
dvipdf some.dvi
rm some.dvi
As you can see, "tex" was invoked, instead of "latex". A built-in rule was
applied.
Now, lets make forget all the built-in rules, with putting an .SUFFIXES:
in front:
.SUFFIXES:
%.eps:
touch $@
%.dvi: %.tex e.eps
latex $<
%.pdf: %.dvi
dvipdf $<
And repeat:
% make -n some.pdf
touch e.eps
latex some.tex
dvipdf some.dvi
rm some.dvi e.eps
We see, it works. "latex" gets called - as supposed.
For some reason, make prefers to apply a built-in rule rather than the
"mixed" implicit-explicit rule.
Is this a bug or a feature?
Frank
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