From owner-freebsd-current  Mon Feb 11  9: 2: 4 2002
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Date: Mon, 11 Feb 2002 09:01:38 -0800
From: Terry Lambert <tlambert2@mindspring.com>
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To: Daniel Eischen <eischen@pcnet1.pcnet.com>
Cc: Bruce Evans <bde@zeta.org.au>,
	Kevin Day <toasty@shell.dragondata.com>, current@FreeBSD.ORG,
	bde@FreeBSD.ORG
Subject: Re: function name collision on "getcontext" with ports/editors/joe
References: <Pine.GSO.4.10.10202111008440.16848-100000@pcnet1.pcnet.com>
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Daniel Eischen wrote:
> It breaks more than that.  Applications that just want to use
> sigaction, sigaltstack, etc, only need to include <signal.h>,
> but that also defines sigreturn as:
> 
>   int     sigreturn __P((ucontext_t *));
> 
> 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.

-- Terry

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