Subject: bug#8104: automake suggests use of AC_PROG_LIBTOOL, this has been replaced by LT_INIT

From: Stefano Lattarini <[email-masked]>
Date: Thu, 24 Feb 2011 10:45:11 +0100

On Thursday 24 February 2011, Jack Kelly wrote:
> Version: 1.11.1 (ubuntu 10.10). I have inspected the most recent
> master and it appears to also have this bug.
> 
> configure.ac:
> AC_INIT([a], [b], [c])
> AM_INIT_AUTOMAKE([foreign])
> dnl no LT_INIT -- on purpose
> AC_PROG_CC
> AC_CONFIG_FILES([Makefile])
> AC_OUTPUT
> 
> Makefile.am:
> lib_LTLIBRARIES = libfoo.la
> 
> Run autoreconf -i:
> $ autoreconf -i
> Makefile.am:1: Libtool library used but `LIBTOOL' is undefined
> Makefile.am:1:   The usual way to define `LIBTOOL' is to add `AC_PROG_LIBTOOL'
> Makefile.am:1:   to `configure.ac' and run `aclocal' and `autoconf' again.
> Makefile.am:1:   If `AC_PROG_LIBTOOL' is in `configure.ac', make sure
> Makefile.am:1:   its definition is in aclocal's search path.
> autoreconf: automake failed with exit status: 1
> 
> See the libtool manual (
> http://www.gnu.org/software/libtool/manual/html_node/LT_005fINIT.html
> ):
> AC_PROG_LIBTOOL and AM_PROG_LIBTOOL are deprecated names for older
> versions of this macro; autoupdate will upgrade your configure.ac
> files.
> 
> It appears that automake's message is out of date.
>
I agree with Jack that advertising the use of LT_INIT would be better,
since, according to Libtool NEWS file, that has obsoleted AC_PROG_LIBTOOL
since version 1.9b (2004-08-29).

What about the attached patch (for maint)?

Regards,
   Stefano
From f61bfa70a40c5f29fa4fa9eb3ce7435f13aeb479 Mon Sep 17 00:00:00 2001
From: Stefano Lattarini <[email-masked]>
Date: Thu, 24 Feb 2011 10:21:19 +0100
Subject: [PATCH] libtool: suggest LT_INIT if LTLIBRARIES primary is used

When the LTLIBRARIES primary was used, but $(LIBTOOL) wasn't
defined, automake suggested to add a call to AC_PROG_LIBTOOL
in configure.ac.  But that macro is deprecated since Libtool
version 1.9b (2004-08-29), in favor of the newer LT_INIT.  So
suggest the use of this latter macro instead.

* lib/Automake/Variable.pm (%_am_macro_for_var): Pair 'LIBTOOL'
with 'LT_INIT', not with 'AC_PROG_LIBTOOL'.
* libtool4.test: Adjust and extend.  Also, add a call to macro
AC_PROG_CC in configure.in, to help ensuring that automake does
not fail for the wrong reasons.
* ltinit.test: New test, ensure that automake's libtool support
works with LT_INIT-based interface.

Thanks to Jack Kelly for the suggestion.
---
 ChangeLog                |   17 +++++++++++++
 lib/Automake/Variable.pm |    2 +-
 tests/Makefile.am        |    1 +
 tests/Makefile.in        |    1 +
 tests/libtool4.test      |    9 ++++++-
 tests/ltinit.test        |   61 ++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 89 insertions(+), 2 deletions(-)
 create mode 100755 tests/ltinit.test

diff --git a/ChangeLog b/ChangeLog
index 8d03512..acd71bb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2011-02-24  Stefano Lattarini  <[email-masked]>
+
+	libtool: suggest LT_INIT if LTLIBRARIES primary is used
+	When the LTLIBRARIES primary was used, but $(LIBTOOL) wasn't
+	defined, automake suggested to add a call to AC_PROG_LIBTOOL
+	in configure.ac.  But that macro is deprecated since Libtool
+	version 1.9b (2004-08-29), in favor of the newer LT_INIT.  So
+	suggest the use of this latter macro instead.
+	* lib/Automake/Variable.pm (%_am_macro_for_var): Pair 'LIBTOOL'
+	with 'LT_INIT', not with 'AC_PROG_LIBTOOL'.
+	* libtool4.test: Adjust and extend.  Also, add a call to macro
+	AC_PROG_CC in configure.in, to help ensuring that automake does
+	not fail for the wrong reasons.
+	* ltinit.test: New test, ensure that automake's libtool support
+	works with LT_INIT-based interface.
+	Thanks to Jack Kelly for the suggestion.
+
 2011-02-20  Stefano Lattarini  <[email-masked]>
 
 	tests: tempdirs with restrictive permissions are cleaned correctly
diff --git a/lib/Automake/Variable.pm b/lib/Automake/Variable.pm
index cb9d182..686847d 100644
--- a/lib/Automake/Variable.pm
+++ b/lib/Automake/Variable.pm
@@ -162,7 +162,7 @@ my %_am_macro_for_var =
    EMACS => 'AM_PATH_LISPDIR',
    GCJ => 'AM_PROG_GCJ',
    LEX => 'AM_PROG_LEX',
-   LIBTOOL => 'AC_PROG_LIBTOOL',
+   LIBTOOL => 'LT_INIT',
    lispdir => 'AM_PATH_LISPDIR',
    pkgpyexecdir => 'AM_PATH_PYTHON',
    pkgpythondir => 'AM_PATH_PYTHON',
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 047bc7b..cd564fa 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -481,6 +481,7 @@ ltcond.test \
 ltcond2.test \
 ltconv.test \
 ltdeps.test \
+ltinit.test \
 ltinstloc.test \
 ltlibobjs.test \
 ltlibsrc.test \
diff --git a/tests/Makefile.in b/tests/Makefile.in
index fe6238b..f56ff21 100644
--- a/tests/Makefile.in
+++ b/tests/Makefile.in
@@ -751,6 +751,7 @@ ltcond.test \
 ltcond2.test \
 ltconv.test \
 ltdeps.test \
+ltinit.test \
 ltinstloc.test \
 ltlibobjs.test \
 ltlibsrc.test \
diff --git a/tests/libtool4.test b/tests/libtool4.test
index bcc9b0f..9f6a730 100755
--- a/tests/libtool4.test
+++ b/tests/libtool4.test
@@ -20,10 +20,17 @@
 
 set -e
 
+cat >> configure.in <<'END'
+AC_PROG_CC
+END
+
 cat > Makefile.am << 'END'
 EXTRA_LTLIBRARIES = liblib.la
 END
 
 $ACLOCAL
 AUTOMAKE_fails
-grep AC_PROG_LIBTOOL stderr
+grep '[Ll]ibtool library .*LIBTOOL.* undefined' stderr
+grep 'define .*LIBTOOL.* add .*LT_INIT' stderr
+
+:
diff --git a/tests/ltinit.test b/tests/ltinit.test
new file mode 100755
index 0000000..d646bc9
--- /dev/null
+++ b/tests/ltinit.test
@@ -0,0 +1,61 @@
+#!/bin/sh
+# Copyright (C) 2011 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test that libtool support works correctly when "newer" libtool
+# interface (with LT_INIT etc.) is used (this interface has been
+# present since libtool 1.9b, circa 2004).
+
+required='libtoolize'
+. ./defs || Exit 1
+
+set -e
+
+cat >>configure.in <<'END'
+AC_PROG_CC
+LT_PREREQ([2.0])
+LT_INIT([dlopen])
+AC_OUTPUT
+END
+
+cat >Makefile.am <<'END'
+lib_LTLIBRARIES = libfoo.la
+END
+
+cat > libfoo.c <<'END'
+int foo (void)
+{
+  return 1;
+}
+END
+
+libtoolize
+$ACLOCAL
+
+$AUTOCONF || { if $? -eq 63; then Exit 77; else Exit 1; fi; }
+$EGREP '^LT_(INIT|PREREQ)' configure && Exit 77
+
+$AUTOMAKE -a
+
+cwd=`pwd`
+./configure --prefix="$cwd/inst" >stdout || { cat stdout; Exit 1; }
+cat stdout
+grep '^checking.*dlopen' stdout
+
+$MAKE
+$MAKE install
+$MAKE distcheck
+
+:
-- 
1.7.2.3