1 files changed, 63 insertions, 0 deletions
diff --git a/t/dollarvar.sh b/t/dollarvar.sh
new file mode 100755
index 000000000..940ef23db
--- /dev/null
+++ b/t/dollarvar.sh
@@ -0,0 +1,63 @@
+#!/bin/sh
+# Copyright (C) 2009-2012 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 to make sure that -Wportability complains about recursive
+# variable expansions and variables containing '$', '$(...)', or
+# '${...}' in the name.  We support recursive variable expansions using
+# the latter two constructs for the 'silent-rules' option, and they are
+# rather widely supported in practice.  OTOH variable definitions
+# containing a '$' on the left hand side of an assignment are not
+# portable in practice, even though POSIX allows them.  :-/
+
+. ./defs || Exit 1
+
+cat >Makefile.am <<'EOF'
+x = 1
+foo$x = 1
+bar$(x) = 1
+baz${x} = 1
+bla = $(foo$x)
+bli = $(foo$(x))
+blo = $(foo${x})
+EOF
+
+$ACLOCAL
+AUTOMAKE_fails -Wportability
+grep 'Makefile.am:2' stderr
+grep 'Makefile.am:3' stderr
+grep 'Makefile.am:4' stderr
+grep 'Makefile.am:5' stderr
+grep 'Makefile.am:6' stderr
+grep 'Makefile.am:7' stderr
+
+# On the other hand, if we allow 'silent-rules' mode, then we need to
+# allow recursive variable expansion, too.
+
+# This should work with the AM_SILENT_RULES macro.
+$sleep
+echo 'AM_SILENT_RULES' >> configure.ac
+
+$ACLOCAL --force
+AUTOMAKE_fails -Wportability
+grep 'Makefile.am:2' stderr
+grep 'Makefile.am:3' stderr
+grep 'Makefile.am:4' stderr
+grep 'Makefile.am:5' stderr
+grep 'Makefile.am:6' stderr && Exit 1
+grep 'Makefile.am:7' stderr && Exit 1
+
+
+: