Re: Linux kernel support -O0 optimization flag?

From: richard -rw- weinberger
Date: Mon Apr 15 2013 - 07:16:42 EST

On Mon, Apr 15, 2013 at 9:58 AM, Ley Foon Tan <lftan@xxxxxxxxxx> wrote:
> Change KBUILD_CFLAGS to -O0 in Makefile and got the compilation error as
> below.
> Is the Linux kernel support -O0 optimization flag?

No. If I'm not mistaken we need this to make sure that the compiler
inlines some functions.

In your case the compiler failed to compute the BUILD_BUG() macro correctly.
It depends also on optimization.

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