check-TESTS and bash, when $(TESTS) is empty

[Kevin Ryde]

Using a CVS automake I recently had a directory where I wanted to run
some tests only if a certain configuration option is selected.

        if SOME_OPTION
        check_PROGRAMS = foo bar
        TESTS = $(check_PROGRAMS)
        endif

This has the desired effect, except when using bash (2.04) for /bin/sh.
The check-TESTS rule has

        for tst in $(TESTS) ; do
        ...
        done

But bash objects to an empty for-loop list ("syntax error near
unexpected token `;'").  A dummy variable (empty or unset) will make
it happy,

        for tst in $(TESTS) $$dummy_to_make_bash_happy ; do
        ...

I was also thinking it'd be good to print nothing at all if there's no
tests, not "All 0 tests passed", ie. wrap the whole check-TESTS in

        if test -n "$(TESTS)"; then
        ...
        fi

But wrapped like that bash still needs the dummy variable.

-- 
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