--- /dev/null
+#! /bin/sh
+# Copyright (C) 2010 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/>.
+
+# Make sure we warn about possible variable typos when we should,
+# Libtool variant.
+
+required=libtoolize
+. ./defs || Exit 1
+
+set -e
+
+cat >>configure.in <<'END'
+AC_PROG_LIBTOOL
+AC_OUTPUT
+END
+
+cat >Makefile.am <<'END'
+libfoo_la_SOURCES = unused
+nodist_libfoo_la_SOURCES = unused
+EXTRA_libfoo_la_SOURCES = unused
+libfoo_la_LIBADD = unused
+libfoo_la_DEPENDENCIES = unused
+EXTRA_libfoo_la_DEPENDENCIES = unused
+END
+
+libtoolize
+$ACLOCAL
+AUTOMAKE_fails --add-missing
+# The expected diagnostic is:
+# automake: warnings are treated as errors
+# Makefile.am:3: warning: variable `EXTRA_libfoo_la_SOURCES' is defined but no program or
+# Makefile.am:3: library has `libfoo_la' as canonical name (possible typo)
+# Makefile.am:1: warning: variable `libfoo_la_SOURCES' is defined but no program or
+# Makefile.am:1: library has `libfoo_la' as canonical name (possible typo)
+# Makefile.am:2: warning: variable `nodist_libfoo_la_SOURCES' is defined but no program or
+# Makefile.am:2: library has `libfoo_la' as canonical name (possible typo)
+# Makefile.am:4: warning: variable `libfoo_la_LIBADD' is defined but no program or
+# Makefile.am:4: library has `libfoo_la' as canonical name (possible typo)
+# Makefile.am:6: warning: variable `EXTRA_libfoo_la_DEPENDENCIES' is defined but no program or
+# Makefile.am:6: library has `libfoo_la' as canonical name (possible typo)
+# Makefile.am:5: warning: variable `libfoo_la_DEPENDENCIES' is defined but no program or
+# Makefile.am:5: library has `libfoo_la' as canonical name (possible typo)
+
+
+test -z "`grep 'as canonical' stderr | grep -v ' .libfoo_la. '`"
+test `grep 'variable.*is defined but' stderr | wc -l` = 6
+
+# If we add a global -Wnone, all warnings should disappear.
+$AUTOMAKE -Wnone
+
+# Likewise, if matching programs or libraries are defined.
+cat >>Makefile.am <<'END'
+lib_LTLIBRARIES = libfoo.la
+END
+
+$AUTOMAKE
+
+:
--- /dev/null
+#! /bin/sh
+# Copyright (C) 2010 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Make sure we warn about possible variable typos when we should.
+
+. ./defs || Exit 1
+
+set -e
+
+cat >>configure.in <<'END'
+AC_PROG_RANLIB
+AC_OUTPUT
+END
+
+cat >Makefile.am <<'END'
+foo_SOURCES = unused
+nodist_foo_SOURCES = unused
+EXTRA_foo_SOURCES = unused
+foo_LDADD = unused
+foo_LDFLAGS = unused
+foo_DEPENDENCIES = unused
+EXTRA_foo_DEPENDENCIES = unused
+
+libfoo_a_SOURCES = unused
+nodist_libfoo_a_SOURCES = unused
+EXTRA_libfoo_a_SOURCES = unused
+libfoo_a_LIBADD = unused
+libfoo_a_DEPENDENCIES = unused
+EXTRA_libfoo_a_DEPENDENCIES = unused
+END
+
+$ACLOCAL
+AUTOMAKE_fails
+# The expected diagnostic is:
+# automake: warnings are treated as errors
+# Makefile.am:2: warning: variable `nodist_foo_SOURCES' is defined but no program or
+# Makefile.am:2: library has `foo' as canonical name (possible typo)
+# Makefile.am:1: warning: variable `foo_SOURCES' is defined but no program or
+# Makefile.am:1: library has `foo' as canonical name (possible typo)
+# Makefile.am:9: warning: variable `libfoo_a_SOURCES' is defined but no program or
+# Makefile.am:9: library has `libfoo_a' as canonical name (possible typo)
+# Makefile.am:10: warning: variable `nodist_libfoo_a_SOURCES' is defined but no program or
+# Makefile.am:10: library has `libfoo_a' as canonical name (possible typo)
+# Makefile.am:11: warning: variable `EXTRA_libfoo_a_SOURCES' is defined but no program or
+# Makefile.am:11: library has `libfoo_a' as canonical name (possible typo)
+# Makefile.am:3: warning: variable `EXTRA_foo_SOURCES' is defined but no program or
+# Makefile.am:3: library has `foo' as canonical name (possible typo)
+# Makefile.am:12: warning: variable `libfoo_a_LIBADD' is defined but no program or
+# Makefile.am:12: library has `libfoo_a' as canonical name (possible typo)
+# Makefile.am:4: warning: variable `foo_LDADD' is defined but no program or
+# Makefile.am:4: library has `foo' as canonical name (possible typo)
+# Makefile.am:5: warning: variable `foo_LDFLAGS' is defined but no program or
+# Makefile.am:5: library has `foo' as canonical name (possible typo)
+# Makefile.am:14: warning: variable `EXTRA_libfoo_a_DEPENDENCIES' is defined but no program or
+# Makefile.am:14: library has `libfoo_a' as canonical name (possible typo)
+# Makefile.am:7: warning: variable `EXTRA_foo_DEPENDENCIES' is defined but no program or
+# Makefile.am:7: library has `foo' as canonical name (possible typo)
+# Makefile.am:6: warning: variable `foo_DEPENDENCIES' is defined but no program or
+# Makefile.am:6: library has `foo' as canonical name (possible typo)
+# Makefile.am:13: warning: variable `libfoo_a_DEPENDENCIES' is defined but no program or
+# Makefile.am:13: library has `libfoo_a' as canonical name (possible typo)
+
+test -z "`grep 'as canonical' stderr | grep -v ' .foo. ' | grep -v ' .libfoo_a. '`"
+test `grep 'variable.*is defined but' stderr | wc -l` = 13
+
+# If we add a global -Wnone, all warnings should disappear.
+$AUTOMAKE -Wnone
+
+# Likewise, if matching programs or libraries are defined.
+cat >>Makefile.am <<'END'
+bin_PROGRAMS = foo
+lib_LIBRARIES = libfoo.a
+END
+
+$AUTOMAKE
+
+: