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$(wildcard) not expanding generated files

From: DervishD
Subject: $(wildcard) not expanding generated files
Date: Mon, 20 Jan 2003 20:02:59 +0100
User-agent: Mutt/1.4i
User-agent: Mutt/1.4i <http://www.mutt.org>

    Hi all :))

    Don't know if this is a bug, but anyway this doesn't work and it
should (IMHO). The problem is the function $(wildcard) not working
properly when the argument is a generated file. Let me explain it
with an example, better. We have this tiny Makefile:

        @touch testfile

install: all
        @echo $(wildcard testfile)

        @rm testfile

    If we do 'make install', 'testfile' is created when the 'all'
target is run but $(wildcard) doesn't notice, so nothing is printed.
But if we do 'make all ; make install', the file is created and,
since $(wildcard) gets run in the second make, it noticed the newly
created file. Is this a bug or a feature? Will this undesired
behaviour (undesired by me, at least) be solved if I replace
$(wildcard pattern) with $(shell echo pattern)?

    This problem shows, AFAIK, with 3.79.1 and 3.80 versions of GNU
make. I've tested both, with the original Makefile and with the tiny
version I show above (the smallest Makefile that I can create that
shows the problem). I've attached that same Makefile.

    As always, thanks a lot for GNU make, a great job ;)))


Attachment: Makefile
Description: Makefile

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