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Re: make depend problem with hello_SOURCES = ${SRCDIR}/hello.c

From: Alexandre Duret-Lutz
Subject: Re: make depend problem with hello_SOURCES = ${SRCDIR}/hello.c
Date: Tue, 13 Sep 2005 23:25:22 +0200
User-agent: Gnus/5.110003 (No Gnus v0.3) Emacs/22.0.50 (gnu/linux)

>>> "HD" == Harald Dunkel <address@hidden> writes:

 HD> Hi folks,
 HD> Question about make depend:

 HD> If I set

 HD> SRCDIR = ../src
 HD> noinst_PROGRAMS = hello
 HD> hello_SOURCES = ${SRCDIR}/hello.c

 HD> in my, then make complains

 HD> Makefile:242: ../src/.deps/hello.Po: No such file or directory
 HD> make[1]: *** No rule to make target `../src/.deps/hello.Po'.  Stop.

 HD> No indication about what went wrong. Even worse, config.status
 HD> has created a weird directory '$(SRCDIR)'.

This is a known bug : file names partly built from variables
values are not supported (but variables containing entire file
names are OK).  Just write hello_SOURCES = ../src/hello.c and
you should be fine.  (Unless you are additionally building
something from src/; in which case you'll hit

 HD> Would it be possible to generate a better error message here?

Actually it would be better to support file names containing variables.
Most of the machinery required for this is here already (the
inner_expand option of Variable::traverse_recursively).  The only tricky
part is that of such part-of-file-name-variables are allowed, we also
have to deal with the case where they are conditionally defined.
Alexandre Duret-Lutz

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