Re: [PATCH] C undefined behavior fix

From: Joseph S. Myers (
Date: Wed Jan 02 2002 - 09:56:03 EST

On Tue, 1 Jan 2002, Tom Rini wrote:

> 3) We could also try turning off this particular optimization
> (-fno-builtin perhaps) on this file, and not worry about it.

In particular, it would probably make sense for the kernel to use
-ffreestanding (which implies -fno-builtin) throughout then selectively
enable the built-in functions that are wanted with macros such as

#define strcpy(d, s) __builtin_strcpy((d), (s))

in an appropriate header, then #undef these macros in the files that
shouldn't use the built-in functions.

Joseph S. Myers

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