tech-userlevel: Re: standards/7112: setjmp is a function

Subject: Re: standards/7112: setjmp is a function
To: Jason Thorpe <thorpej@nas.nasa.gov>
From: Krister Walfridsson <cato@df.lth.se>
List: tech-userlevel
Date: 03/09/1999 19:49:02

On Mon, 8 Mar 1999, Jason Thorpe wrote:
> I don't really see how this can be an issue. What if the macro itself
> calls functions?! I.e. you might just have to do that on some systems
> (e.g. SVR4 which uses getcontext(2) to do setjmp(3)).
The thing the egcs people wanted to do was check if <setjmp.h> had been
included (don't ask me why), and "since setjmp is a macro", the idea was
to do something like 
 #ifdef setjmp
 extern void set_float_handler PROTO((jmp_buf));
 extern int push_float_handler PROTO((jmp_buf, jmp_buf));
 extern void pop_float_handler PROTO((int, jmp_buf));
 #endif
But ITOH Yasufumi is right that it doesn't need to be a macro. I guess
the wording is there to say that you cannot take the address of setjmp.
 /Krister