1 files changed, 71 insertions, 0 deletions
diff --git a/t/pluseq9.sh b/t/pluseq9.sh
new file mode 100755
index 000000000..f3c802158
--- /dev/null
+++ b/t/pluseq9.sh
@@ -0,0 +1,71 @@
+#! /bin/sh
+# Copyright (C) 2002-2012 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 the += diagnostics.
+
+. ./defs || Exit 1
+
+cat >>configure.ac << 'END'
+AM_CONDITIONAL([COND1], [true])
+AM_CONDITIONAL([COND2], [true])
+AM_CONDITIONAL([COND3], [true])
+END
+
+cat > Makefile.am << 'END'
+if COND1
+  C = c
+if COND2
+    A = a
+    B = aa
+    C += cc
+else
+    A = b
+    B = bb
+endif
+  A += c
+else
+  A = d
+endif
+A += e
+
+if COND3
+  A += f
+  B = cc
+endif
+B += dd
+END
+
+$ACLOCAL
+AUTOMAKE_fails
+
+# We expect the following diagnostic:
+#
+# Makefile.am:19: cannot apply '+=' because 'B' is not defined in
+# Makefile.am:19: the following conditions:
+# Makefile.am:19:   !COND1 and !COND3
+# Makefile.am:19: either define 'B' in these conditions, or use
+# Makefile.am:19: '+=' in the same conditions as the definitions.
+#
+# It would be nice if Automake could print only COND3_FALSE and
+# COND1_FALSE (merging the last two conditions), so we'll support
+# this case in the check too.
+
+grep '[cC]annot apply.*+=' stderr
+grep ':   !COND1 and !COND3$' stderr
+# Make sure there is exactly one missing condition.
+test `grep ':  ' stderr | wc -l` = 1
+
+: