Subject: Re: __STDC__ in cdefs_elf.h
To: Garrett D'Amore <>
From: Jason Thorpe <>
List: tech-kern
Date: 09/08/2006 09:57:22
On Sep 8, 2006, at 9:38 AM, Garrett D'Amore wrote:

> There are a number of tests for __STDC__ in cdefs_elf.h.  I think this
> is silly, and makes the code harder to read.  Additionally, the link  
> set
> support in the file does ANSI token concatenation, but lacks the
> __STDC__ checks.
> I'd like to unidef that, removing all the support for pre-ANSI
> environments.  About the only conceivable objection I can imagine is  
> if
> someone is still using K&R C to build kernels, or if this file is
> somehow used in bootstrapping tools (e.g. to bootstrap GCC from a  
> K&R C
> environment).

No one is using K&R C for building kernels anymore, because we are  
using ISO C constructs in the kernel.

I don't think anyone for userland is really using gcc -traditional  
anymore, either... so I think it's probably fine to remove the  
__STDC__ checks and assume it always.

> I don't think _either_ is the case (I think even the pdp10 external  
> pcc
> compiler supports ANSI C now, although I don't know if those kernels  
> are
> built with ELF or not), so I'd like to clean this up.
> Objections?
> -- 
> Garrett D'Amore, Principal Software Engineer
> Tadpole Computer / Computing Technologies Division,
> General Dynamics C4 Systems
> Phone: 951 325-2134  Fax: 951 325-2191

-- thorpej