From owner-freebsd-current  Tue Feb 12  2:24:46 2002
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Date: Tue, 12 Feb 2002 21:23:46 +1100 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: Daniel Eischen <eischen@pcnet1.pcnet.com>
Cc: Terry Lambert <tlambert2@mindspring.com>,
	Kevin Day <toasty@shell.dragondata.com>, <current@FreeBSD.ORG>,
	<bde@FreeBSD.ORG>
Subject: Re: function name collision on "getcontext" with ports/editors/joe
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On Mon, 11 Feb 2002, Daniel Eischen wrote:

> On Mon, 11 Feb 2002, Terry Lambert wrote:
> > Daniel Eischen wrote:
> > > Removing <sys/ucontext.h> from <sys/signal.h> prevents ucontext_t
> > > from being defined, so all users of <signal.h> would choke.
> > >
> > > We can change the prototype of sigreturn back to struct sigcontext *,
> > > or just forward declare ucontext_t in <signal.h> or <sys/signal.h>.
> >
> > Forward declare it.  People who need its internals will
> > include the proper header.

That header is traditionally <signal.h> :-).

> How do you easily forward declare something that is a typedef?
> You could forward declare struct __ucontext and use a pointer
> to that as the argument to sigreturn, but that doesn't seem
> right as it is relying on how ucontext_t is defined.

This is OK for the implementation -- see other followups.

Bruce


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