GNU bug report logs - #7800
automake fails to honor `-d' in AM_YFLAGS when variable expansions are involved

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefano Lattarini <stefano.lattarini <at> gmail.com>
Subject: bug#7800: closed (Re: [PATCHES] yacc: support variable expansions
 in *YFLAGS definition)
Date: Sun, 09 Jan 2011 15:23:01 +0000

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Your bug report

#7800: automake fails to honor `-d' in AM_YFLAGS when variable expansions are involved

which was filed against the automake package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 7800 <at> debbugs.gnu.org.

-- 
7800: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=7800
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Stefano Lattarini <stefano.lattarini <at> gmail.com>
To: Ralf Wildenhues <Ralf.Wildenhues <at> gmx.de>
Cc: 7800-done <at> debbugs.gnu.org, automake-patches <at> gnu.org
Subject: Re: [PATCHES] yacc: support variable expansions in *YFLAGS definition
Date: Sun, 9 Jan 2011 16:28:06 +0100

Reference:
 <http://lists.gnu.org/archive/html/automake-patches/2011-01/msg00057.html>

Both patches (with nits addressed) merged to master, and pushed.
This should fix automake bug#7800.

Regards,
  Stefano

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From: Stefano Lattarini <stefano.lattarini <at> gmail.com>
To: bug-automake <at> gnu.org
Subject: automake fails to honor `-d' in AM_YFLAGS when variable expansions
	are involved
Date: Fri, 7 Jan 2011 15:36:43 +0100

severity: wishlist
thanks

-*-*-

Hello automakers.

Currently, automake is not smart enough to resolve variable expansions
in AM_YFLAGS (or foo_YFLAGS) when scanning them for the `-d' flag.

For example:

  $ cat configure.ac
  AC_INIT(x,0)
  AM_INIT_AUTOMAKE(foreign)
  AC_PROG_CC
  AC_PROG_YACC
  AC_CONFIG_FILES(Makefile)
  $ cat Makefile.am
  bin_PROGRAMS = foo bar
  foo_SOURCES = foo.y
  bar_SOURCES = bar.y
  my_YFLAGS = -d
  AM_YFLAGS = $(my_YFLAGS)
  bar_YFLAGS = $(my_YFLAGS)
  $ aclocal
  $ automake -a
  $ egrep '(foo|bar).h\.*:' Makefile.in # no match :-(
  $ sed -i 's/$(my_YFLAGS)/-d/' Makefile.am 
  $ automake
  $ egrep '(foo|bar)\.h.*:' Makefile.in # now as expected
  bar-bar.h: bar-bar.c
  foo.h: foo.c

Not sure if this bug is worth fixing, but having it reported in the bug
database won't hurt, either (and I might anyway attempt a fix soonish).

Regards,
  Stefano

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