Re: [PATCH] [POWERPC] Fix kernel builds with newer gcc versions and -Os

[David Miller <davem@davemloft.net>]

From: Scott Wood <scottwood@freescale.com>
Date: Fri, 02 May 2008 17:16:07 -0500

> If GCC generates a call to a libgcc function that calls a libc function, 
> I'd consider that a pretty serious bug, given that said libc function is 
> likely to consist of GCC-generated code, which could call the same 
> libgcc function, which calls the libc function, etc.

Not really, there are several interfaces in libgcc that need some
runtime help from the C library or the dynamic linker.

For example, EH frame support.

You really don't know what you're talking about.

> I'd say problems are more likely if you use nonstandard implementations 
> of GCC internals...

The kernel is a special environment.  Therefore even if you start
linking with libgcc, it is inevitable that you will need some
changed local version for some of those routines in the kernel.