I found something:
in my environnement when I su root I have:
MAIL=/users/cao/bouyer/Mail/Inbox
If I remove it or set it to /tmp/Inbox 'make build' no longer hangs.
I ktraced it, and sh does:
   273 sh       CALL  __stat13(0x80b0a24,0xbfbfd550)
   273 sh       NAMI  "/tmp/Inbox"
   273 sh       RET   __stat13 -1 errno 2 No such file or directory


Of course /users/cao/bouyer/Mail isn't readable by the NFS client's root
Can it be that, when a stat on a file gets "permission denied" a lock isn't
properly released ?

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Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
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