On Sun, 10 Feb 2002, Daniel Eischen wrote:

> Hmm, <sys/signal.h> includes <sys/ucontext.h>.  I'm not sure why though.
> bde might know.

<sys/signal.h> includes <machine/signal.h> for the normal namespace
pollution that was needed to use sigreturn(2) (except sigreturn(2)
itself isn't actually declared anywhere).  Including <sys/ucontext.h>
gives the corresponding namespace pollution for using the current
sigreturn(2).  This is probably a mistake.  (Don't believe the
sigreturn man page; it documents osigreturn(2) for the i386 only.)
Programs shouldn't have any problems with this, since they should
define _POSIX_SOURCE if they only want the POSIX namespace ;-).


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