dejagnu: ensure 'srcdir' is defined as a relative directory

This change fixes automake bug#7833.

* lib/am/dejagnu.am (check-DEJAGNU): Prefer using plain $(srcdir)
over calculating and using the absolute path of $(srcdir).
* tests/dejagnu-relative-srcdir.test: New test.
* tests/dejagnu-absolute-builddir.test: Likewise.
* tests/Makefile.am (TESTS): Update.

Report by Ian Lance Taylor.  Suggestions by Ralf Wildenhues.

1 files changed, 86 insertions, 0 deletions

diff --git a/tests/dejagnu-relative-srcdir.test b/tests/dejagnu-relative-srcdir.test
new file mode 100755
index 000000000..8a70d58e8
--- /dev/null
+++ b/tests/dejagnu-relative-srcdir.test
@@ -0,0 +1,86 @@
+#! /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/>.
+
+# Check that DejaGnu testsuites have 'srcdir' defined to a relative path
+# (both as TCL variable and as environment variable).
+
+required=runtest
+. ./defs || Exit 1
+
+set -e
+
+cat >> configure.in << 'END'
+AC_OUTPUT
+END
+
+cat > Makefile.am << 'END'
+AUTOMAKE_OPTIONS = dejagnu
+DEJATOOL = tcl env
+EXTRA_DIST = env.test/env.exp tcl.test/tcl.exp lib/tcl.exp
+END
+
+mkdir env.test tcl.test lib
+
+# DejaGnu can change $srcdir behind our backs, so we have to
+# save its original value.  Thanks to Ian Lance Taylor for the
+# suggestion.
+cat > lib/tcl.exp << 'END'
+send_user "tcl_lib_srcdir: $srcdir\n"
+set orig_srcdir $srcdir
+END
+
+cat > env.test/env.exp << 'END'
+set env_srcdir $env(srcdir)
+send_user "env_srcdir: $env_srcdir\n"
+if { [ regexp "^\.\.?$" $env_srcdir ] } {
+    pass "test_env_src"
+} else {
+    fail "test_env_src"
+}
+END
+
+cat > tcl.test/tcl.exp << 'END'
+send_user "tcl_srcdir: $srcdir\n"
+if { [ regexp "^\.\.?$" $srcdir ] } {
+    pass "test_tcl_src"
+} else {
+    fail "test_tcl_src"
+}
+send_user "tcl_orig_srcdir: $orig_srcdir\n"
+if { [ regexp "^\.\.?$" $orig_srcdir ] } {
+    pass "test_tcl_orig_src"
+} else {
+    fail "test_tcl_orig_src"
+}
+END
+
+$ACLOCAL
+$AUTOCONF
+$AUTOMAKE --add-missing
+
+./configure --srcdir=.
+
+$MAKE check
+
+# Sanity check: all tests have run.
+test -f env.log
+test -f env.sum
+test -f tcl.log
+test -f tcl.sum
+
+$MAKE distcheck
+
+: