-esac
-
-# Now exit if we have it, but it failed. Also exit now if we
-# don't have it and --version was passed (most likely to detect
-# the program).
-case "$1" in
- lex|yacc)
- # Not GNU programs, they don't have --version.
- ;;
-
- tar)
- if test -n "$run"; then
- echo 1>&2 "ERROR: \`tar' requires --run"
- exit 1
- elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
- exit 1
- fi
- ;;
-
- *)
- if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
- # We have it, but it failed.
- exit 1
- elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
- # Could not run --version or --help. This is probably someone
- # running `$TOOL --version' or `$TOOL --help' to check whether
- # $TOOL exists and not knowing $TOOL uses missing.
- exit 1
- fi
- ;;
-esac
-
-# If it does not exist, or fails to run (possibly an outdated version),
-# try to emulate it.
-case "$1" in
- aclocal*)