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2013-08-09change sigset_t functions to restrict to _NSIGRich Felker1-2/+2
the idea here is to avoid advertising signals that don't exist and to make these functions safe to call (e.g. from within other parts of the implementation) on fake sigset_t objects which do not have the HURD padding.
2011-09-12implement gnu sigisemptysetRich Felker1-0/+9