Re: [Minios-devel] [PATCH ARM v9 1/3] mini-os: fix compiling with debug=n

[Anil Madhavapeddy <anil@xxxxxxxxxx>]

On 25 Jun 2015, at 16:49, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> 
> On Thu, 2015-06-25 at 14:48 +0100, Thomas Leonard wrote:
>> Without -fno-tree-loop-distribute-patterns, gcc -O3 recognises that our
>> "memset" is doing a memset operation and tries to make it call the
>> standard "memset", creating a loop.
> 
> Isn't this what -nostdlib and such like are for?
> 
> In any case if we are to go down this route I think we'd be better off
> applying it only to lib/string.c or even better just to the memset
> function, if there is a way to do that.

I think -nostdlib is distinct from -fno-builtins.  If the issue is
convincing GCC to not replace the memset with a builtin one, would
-fno-builtin-memset be more appropriate here?

-anil


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