Antwort: Re: [RFC][PATCH 0/1] toolchain conflict for userspace tools

[PHYTEC Mailinglists]

Hi Sascha,

"barebox" <barebox-bounces at lists.infradead.org> wrote on 04/23/2015 
09:07:28 AM:

> Von: Sascha Hauer <s.hauer at pengutronix.de>
> An: Stefan Müller-Klieser <s.mueller-klieser at phytec.de>
> Kopie: barebox at lists.infradead.org
> Datum: 04/23/2015 09:08 AM
> Betreff: Re: [RFC][PATCH 0/1] toolchain conflict for userspace tools
> Gesendet von: "barebox" <barebox-bounces at lists.infradead.org>
> 
> Hi Stefan,
> 
> On Mon, Apr 20, 2015 at 03:10:26PM +0200, Stefan Müller-Klieser wrote:
> > Dear bareboxers,
> > 
> > I ask for help with a problem I am facing. If the buildsystem compiles
> > gcc with multilib support, gcc can support the float abi 
callconvention
> > to be generated dynamically, as yocto starting with v1.7 does. So we
> > don't have the usual default "--with-float=hard", but gcc sets the
> > mfloat-abi at runtime for every package.
> > This seems to work well in general, e.g. modern autotools and the
> > Kconfig infrastructure for kernel and barebox. However this fails
> > for the target tools in the barebox script folder. They need to have
> > the --with-float=hard set, or they will try to compile as softfloat.
> > I think the general solution would be to give the user the possibility
> > to redefine the CC for the userspace tools, as this is very specific
> > to the environment where the barebox gets compiled.
> > But maybe someone with a deeper knowledge of the Makefile 
infrastructure
> > can recommend a better long term solution.
> 
> We discussed this here and came to the conclusion that not CC should be
> exchanged but rather we should have userspace specific CFLAGS. The
> currently used CFLAGS contains stuff not suitable for userspace anyway.
> Would introducing CFLAGS_USERSPACE work for you?

Sure, that sounds intuitive. Thanks!
Stefan

> 
> Sascha
> 
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