[PATCH] getcwd / PATH_MAX check in configure breaks on GNU

[Robert Millan]

hi!

as reported to Savannah BTS 
(http://savannah.gnu.org/patch/?func=detailpatch&patch_id=1416&group_id=2613) 
coreutils site:

the test that checks wether getcwd accepts paths longer than PATH_MAX
works badly on systems where PATH_MAX is undefined, like GNU (aka GNU/Hurd).

when PATH_MAX is not defined, it means there's no generic limit on the length
of a path, and thus this kind of bug in getcwd cannot exist, so it should
not be tested for it.

see the comments added in the patch, they're quite explanative.

patch in http://savannah.gnu.org/patch/download.php?id=1416

-- 
Robert Millan

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