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* include cleanups: remove unused headers and add feature test macrosSzabolcs Nagy2013-12-121-1/+0
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* fix sigemptyset and sigfillset for mipsRich Felker2013-09-161-0/+5
| | | | they were leaving junk in the upper bits.
* overhaul implementation-internal signal protectionsRich Felker2011-05-071-1/+7
| | | | | | | | | | | | | | | | | | | the new approach relies on the fact that the only ways to create sigset_t objects without invoking UB are to use the sig*set() functions, or from the masks returned by sigprocmask, sigaction, etc. or in the ucontext_t argument to a signal handler. thus, as long as sigfillset and sigaddset avoid adding the "protected" signals, there is no way the application will ever obtain a sigset_t including these bits, and thus no need to add the overhead of checking/clearing them when sigprocmask or sigaction is called. note that the old code actually *failed* to remove the bits from sa_mask when sigaction was called. the new implementations are also significantly smaller, simpler, and faster due to ignoring the useless "GNU HURD signals" 65-1024, which are not used and, if there's any sanity in the world, never will be used.
* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-121-0/+8