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Re: [PATCH 4/4] Use AM_MISSING_PROG when making bison the default YACC h


From: Ralf Wildenhues
Subject: Re: [PATCH 4/4] Use AM_MISSING_PROG when making bison the default YACC here
Date: Wed, 28 Apr 2010 07:45:10 +0200
User-agent: Mutt/1.5.20 (2009-10-28)

Hello,

* Bruno Haible wrote on Wed, Apr 28, 2010 at 01:23:18AM CEST:
> Andreas Gruenbacher wrote:
> > > This variable will not be used if a user unpacks and compiles a virgin
> > > tarball.
> > 
> > ... unless the timestamps get destroyed, or make gets things wrong.  The 
> > latter apparently happened to Daniel (CCed) on Tru64 with the native make; 
> > the 
> > result was a build failure.  (GNU make got that situation right.)
> 
> OK, so that was the original problem. I agree it's a nasty one.

Usually the actual problem with non-GNU make and VPATH is not due to
time stamps, but due to the issues described in
http://www.gnu.org/software/autoconf/manual/html_node/VPATH-and-Make.html>
more specifically
<http://www.gnu.org/software/autoconf/manual/html_node/Make-Target-Lookup.html>
(but there is also a section specifically about Tru64 make craziness,
doesn't apply here AFAICS).

Prepending all files generated in the source tree with $(srcdir)/
usually works.  One has to note though that it really needs to be done
in every place, ie., als EXTRA_DIST, and bits which might be generated
by automake.

Cheers,
Ralf




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