Subject: Re: port better to POSIX hosts lacking _setjmp

From: Paul Eggert <[email-masked]>
Date: Fri, 14 Sep 2012 14:28:23 -0700

On 09/14/2012 01:30 PM, Eli Zaretskii wrote:
> Why not simply switch to using
> ANSI- and Posix-standard setjmp/longjmp?

Because longjmp might alter the signal mask,
and it might not.  POSIX doesn't say either way,
platforms differ in this respect, and the
differences can mess things up and slow things down.
This is why Emacs uses _longjmp now, on GNU and
POSIXish platforms.