Description:
------------
I was just trying out some tests written for 5.3 with HEAD, when I noticed the following:

$ make test TESTS=ext/whatever

Warning: fopen(): Filename cannot be empty in /root/src/php6/run-tests.php on line 1164
ERROR: Cannot open test file:
make: [test] Error 1 (ignored)

That means if there's a symlink with no endpoint, the whole testsuite can't run. It works fine if the symlinked file is just an empty (existing) file:

BORK cannot read test [/tmp/foo]

Yes, having tests only symlinked inside the source dir might be weird, so I filed this as feature request and not bug

Reproduce code:
---------------
$ touch /tmp/foo
$ ln -s /tmp/foo /path/to/php-src/ext/whatever/tests/foo.phpt
$ rm /tmp/foo
$ make test TESTS=ext/whatever

Expected result:
----------------
$ make test TESTS=ext/whatever
[...]
BORK symlink endpoint /tmp/foo doesn't exist

Actual result:
--------------
$ make test TESTS=ext/whatever

Warning: fopen(): Filename cannot be empty in /root/src/php6/run-tests.php on line 1164
ERROR: Cannot open test file:
make: [test] Error 1 (ignored)