[ELDK] eldk-5.5.2 issues

[Marek Vasut]

On Saturday, October 25, 2014 at 01:04:08 PM, Pavel Machek wrote:
> Hi!
> 
> On Fri 2014-10-24 12:02:21, Wolfgang Denk wrote:
> > In message <20141023145122.GA10650 at amd> you wrote:
> > > Eldk-5.5 seems to miscompile u-boot on altera socfpga (arm board), so
> > > I tried updating to eldk-5.5.2... but I ran into problems compiling
> > > u-boot-mkimage.
> > 
> > The compilers used in ELDK V5.5 and v5.5.x (and even v5.6) have known
> > issues at least on the PowerPC and ARM architectures;  the ARM kernel
> > might even blacklist it, see [1].
> > 
> > So I doubt your problems will go away when moving from ELDK v5.5 to
> > v5.5.2; if you cannot fall back to ELDK v5.4 (gcc 4.7.2) you will have
> > to wait for ELDk v5.7 (gcc 4.9.1).
> 
> I did not manage to switch to v5.5.2, but it seems that ELDK v5.5
> contains fully working gcc-4.7 toolchain.
> 
> As they are known problems with gcc-4.8, perhaps it makes sense to
> merge something like below for eldk v5.5.3 (and maybe eldk v5.6)?
> 
> Signed-off-by: Pavel Machek <pavel at denx.de>
> 
> Best regards,
> 									Pavel
> 
> 
> diff --git a/meta/conf/distro/include/tcmode-default.inc
> b/meta/conf/distro/include/tcmode-default.inc index fb41d5e..df90219
> 100644
> --- a/meta/conf/distro/include/tcmode-default.inc
> +++ b/meta/conf/distro/include/tcmode-default.inc
> @@ -17,7 +17,7 @@ PREFERRED_PROVIDER_virtual/${TARGET_PREFIX}libc-initial =
> "${TCLIBC}-initial"
> PREFERRED_PROVIDER_virtual/nativesdk-${SDK_PREFIX}libc-initial =
> "nativesdk-${TCLIBC}-initial" PREFERRED_PROVIDER_virtual/gettext ??=
> "gettext"
> 
> -GCCVERSION ?= "4.8%"
> +GCCVERSION ?= "4.7%"
>  SDKGCCVERSION ?= "${GCCVERSION}"
>  BINUVERSION ?= "2.23.2"
>  EGLIBCVERSION ?= "2.18"

You (as a layer provider) should never hack meta/ . If you need to override 
something, then such override should go into the meta-foo/ layer, which you
generated (meta-eldk in this case). Though I disagree that downgrading the
GCC version is a good way to go.

Do we already know what's the stance of the Yocto guys on the GCC 4.8.x problem?

Best regards,
Marek Vasut