GNU bug report logs - #60508
archive DEPENDENCIES incorrectly depends on ordering

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From: Karl Berry <karl@HIDDEN>
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Subject: Re: bug#60508: archive DEPENDENCIES incorrectly depends on ordering
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Hi Mike - thanks for the report.

    * libmMID.a defines a bunch of common objects
    * libaFIRST.a and libzLAST.a adds libmMID.a's objects to its libadd
    * libaFIRST.a's dependency is *missing* the objects, but libzLAST.a
    has them

Yikes. Well, if you or anyone can find a patch, that would be great.
Else I'll look at it when I have a chance (not soon, unfortunately).
--thanks again, karl.

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From: Mike Frysinger <vapier@HIDDEN>
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Subject: archive DEPENDENCIES incorrectly depends on ordering
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i have a project that generates a bunch of arch-specific archives.  i also have
an intermediate archive for holding common objects (so only need to build them
once).  i noticed that while (ab)using LIBADD & OBJECTS variables, Automake
incorrectly omits propagating OBJECTS variables from LIBADD to DEPENDENCIES if
the library using the OBJECTS comes before the library defining the OBJECTS.

attaching a testcase to run against current git that triggers the bug that
hopefully makes it a little clearer:
* libmMID.a defines a bunch of common objects
* libaFIRST.a and libzLAST.a adds libmMID.a's objects to its libadd
* libaFIRST.a's dependency is *missing* the objects, but libzLAST.a has them

$ ./pre-inst-env ./runtest t/ar-dep.sh
...
+ grep _a_DEPENDENCIES = Makefile.in
libaFIRST_a_DEPENDENCIES =
libzLAST_a_DEPENDENCIES = $(libmMID_a_OBJECTS)
+ grep ^libzLAST_a_DEPENDENCIES = $(libmMID_a_OBJECTS) Makefile.in
libzLAST_a_DEPENDENCIES = $(libmMID_a_OBJECTS)
+ grep ^libaFIRSTT_a_DEPENDENCIES = $(libmMID_a_OBJECTS) Makefile.in
+ am_exit_trap 1
...
-mike

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#! /bin/sh=0A# Copyright (C) 2023 Free Software Foundation, Inc.=0A#=0A# Th=
is program is free software; you can redistribute it and/or modify=0A# it u=
nder the terms of the GNU General Public License as published by=0A# the Fr=
ee Software Foundation; either version 2, or (at your option)=0A# any later=
 version.=0A#=0A# This program is distributed in the hope that it will be u=
seful,=0A# but WITHOUT ANY WARRANTY; without even the implied warranty of=
=0A# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the=0A# GNU =
General Public License for more details.=0A#=0A# You should have received a=
 copy of the GNU General Public License=0A# along with this program.  If no=
t, see <https://www.gnu.org/licenses/>.=0A=0A# Test for bug in DEPENDENCIES=
 settings.=0A=0A. test-init.sh=0A=0Acat >> configure.ac << 'END'=0AAC_PROG_=
CC=0AAM_PROG_AR=0AAC_PROG_RANLIB=0AEND=0A=0Acat > Makefile.am << 'END'=0Ano=
inst_LIBRARIES =3D=0A=0AlibmMID_a_SOURCES =3D source.c=0Anoinst_LIBRARIES +=
=3D libmMID.a=0A=0AlibaFIRST_a_SOURCES =3D=0AlibaFIRST_a_LIBADD =3D $(libmM=
ID_a_OBJECTS)=0Anoinst_LIBRARIES +=3D libaFIRST.a=0A=0AlibzLAST_a_SOURCES =
=3D=0AlibzLAST_a_LIBADD =3D $(libmMID_a_OBJECTS)=0Anoinst_LIBRARIES +=3D li=
bzLAST.a=0AEND=0A=0A: > ar-lib=0A=0A$ACLOCAL=0A$AUTOMAKE=0A=0A# Make sure D=
EPENDENCIES is setup correctly.=0Agrep '_a_DEPENDENCIES =3D' Makefile.in=0A=
grep '^libzLAST_a_DEPENDENCIES =3D $(libmMID_a_OBJECTS)' Makefile.in=0Agrep=
 '^libaFIRSTT_a_DEPENDENCIES =3D $(libmMID_a_OBJECTS)' Makefile.in=0A=0A:=0A
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