Remove dependency_libs from libtool *.la files.

Add a libtool wrapper which kills dependency_libs in libtool *.la
files, to ensure that libtool doesn't add unnecessary extra libraries
when linking.

See http://lists.fedoraproject.org/pipermail/devel/2010-November/146343.html

Makefile.am

@@ -91,7 +91,8 @@ EXTRA_DIST = \
 	contrib/README \
 	bindtests \
 	.gitignore \
-	m4/.gitignore
+	m4/.gitignore \
+	libtool-kill-dependency_libs.sh
 
 # Recipes web page.
 html/recipes.html: $(wildcard recipes/*.sh) $(wildcard recipes/*.html) $(wildcard recipes/*.example) Makefile make-recipes.sh

configure.ac

@@ -830,6 +830,11 @@ dnl Library versioning.
 MAX_PROC_NR=`cat $srcdir/src/MAX_PROC_NR`
 AC_SUBST(MAX_PROC_NR)
 
+dnl Replace libtool with a wrapper that clobbers dependency_libs in *.la files
+dnl http://lists.fedoraproject.org/pipermail/devel/2010-November/146343.html
+LIBTOOL='$(SHELL) $(top_srcdir)/libtool-kill-dependency_libs.sh $(top_builddir)/libtool'
+AC_SUBST([LIBTOOL])
+
 dnl Run in subdirs.
 if test "x$enable_daemon" = "xyes"; then
     AC_CONFIG_SUBDIRS([daemon])

libtool-kill-dependency_libs.sh

@@ -0,0 +1,57 @@
+#!/bin/bash -
+# libtool-kill-dependency_libs.sh
+# Copyright (C) 2010 Red Hat 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 of the License, 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, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+# Run libtool as normal, then kill the dependency_libs line in the .la
+# file.  Otherwise libtool will add DT_NEEDED entries for dependencies
+# of libguestfs to all the other binaries, which is NOT helpful
+# behaviour.
+
+set -e
+
+# Find the -o option.  The precise name of this option is full of
+# magic for libtool so we cannot change it here, which is what we'd
+# like to do.  Unfortunately this introduces a short race for parallel
+# makes but there's not much we can do about that.
+declare -a args
+i=0
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+        -o)
+            output="$2"
+            args[$i]="$1"
+            ((++i))
+            args[$i]="$2"
+            ((++i))
+            shift 2;;
+        *)
+            args[$i]="$1";
+            ((++i))
+            shift;;
+    esac
+done
+
+# Run libtool as normal.
+#echo "${args[@]}"
+"${args[@]}"
+mv "$output" "$output.tmp"
+
+# Remove dependency_libs from output.
+sed "s/^dependency_libs=.*/dependency_libs=''/" < "$output.tmp" > "$output"
+chmod --reference="$output.tmp" "$output"
+rm "$output.tmp"