Parallel "make check" support.

* build-aux/check.mk: New file, from The Vaucanson Group.
* .x-sc_GPL_version: New file, to allow "version 2 or later"
in build-aux/check.mk.
* Makefile.am (EXTRA_DIST): Add .x-sc_GPL_version.
* tests/check.mk: New file.
* tests/Makefile.am (EXTRA_DIST): Add check.mk, mkdtemp and test-lib.sh.

Begin factoring "sample-test" out of test scripts.
* tests/test-lib.sh: New file, to be sourced by all tests that
were previously derived from the "sample-test" template.
* tests/mkdtemp: New file.
* tests/touch/dir-1: Use test-lib.sh.
* tests/touch/empty-file: Likewise.
* tests/touch/fail-diag: Likewise.
* tests/touch/fifo: Likewise.
* tests/touch/no-create-missing: Likewise.
* tests/touch/no-rights: Likewise.  Also, don't sleep.
* tests/touch/not-owner: Likewise.
* tests/touch/obsolescent: Likewise.
* tests/touch/read-only: Likewise.
* tests/touch/relative: Likewise.
* tests/touch/Makefile.am: Include $(top_srcdir)/tests/check.mk,
to get the parallel-"make check" bits.

Move a slow test into tests/misc.

* tests/check.mk: Wrapper.
* tests/ls/time-1: Move this file to tests/misc/ls-time.
* tests/misc/ls-time: New file.  From tests/ls/time-1.
* tests/ls/Makefile.am (TESTS): Remove time-1.
* tests/misc/Makefile.am (TESTS): Add ls-time.

1 files changed, 40 insertions, 0 deletions

diff --git a/tests/test-lib.sh b/tests/test-lib.sh
new file mode 100644
index 000000000..79d0ef2c7
--- /dev/null
+++ b/tests/test-lib.sh
@@ -0,0 +1,40 @@
+# source this file; set up for tests
+
+# Skip this test if the shell lacks support for functions.
+unset function_test
+eval 'function_test() { return 11; }; function_test'
+if test $? != 11; then
+  echo "$0: /bin/sh lacks support for functions; skipping this test." 1>&2
+  (exit 77); exit 77
+fi
+
+test_dir_=$(pwd)
+
+this_test_() { echo "./$0" | sed 's,.*/,,'; }
+this_test=$(this_test_)
+
+. $srcdir/../envvar-check
+
+# This is a stub function that is run upon trap (upon regular exit and
+# interrupt).  Override it with a per-test function, e.g., to unmount
+# a partition, or to undo any other global state changes.
+cleanup_() { :; }
+
+t_=$($abs_top_srcdir/tests/mkdtemp $test_dir_ cu-$this_test.XXXXXXXXXX) \
+    || error "failed to create temporary directory in $test_dir_"
+
+# Run each test from within a temporary sub-directory named after the
+# test itself, and arrange to remove it upon exception or normal exit.
+trap 'st=$?; cleanup_; d='"$t_"';
+    cd '"$test_dir_"' && chmod -R u+rwx "$d" && rm -rf "$d" && exit $st' 0
+trap '(exit $?); exit $?' 1 2 13 15
+
+cd $t_ || error "failed to cd to $t_"
+
+if ( diff --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
+  compare() { diff -u "$@"; }
+elif ( cmp --version < /dev/null 2>&1 | grep GNU ) 2>&1 > /dev/null; then
+  compare() { cmp -s "$@"; }
+else
+  compare() { cmp "$@"; }
+fi