[Buildroot] [PATCH 1/1] package/x11r7/xserver_xorg-server: libunwind support is broken on mips64

[Vicente Olivert Riera <Vincent.Riera@imgtec.com>]

Dear Bernd Kuhls, Peter Korsgaard,

On 11/30/2014 08:40 PM, Peter Korsgaard wrote:
>>>>>> "Bernd" == Bernd Kuhls <bernd.kuhls@t-online.de> writes:
> 
>  > Fixes
>  > http://autobuild.buildroot.net/results/e8f/e8f68163802f31359cee15fa3ca52547e06d1f27/
>  > http://autobuild.buildroot.net/results/994/9947222da8682a358f81f8ac924c12596fd09ee8/
>  > http://autobuild.buildroot.net/results/df9/df92d9b682976b77d9e1e4c39afca52b7512d847/
> 
>  > Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
>  > ---
>  >  package/x11r7/xserver_xorg-server/xserver_xorg-server.mk |    4 +++-
>  >  1 file changed, 3 insertions(+), 1 deletion(-)
> 
>  > diff --git a/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
>  > b/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
>  > index 4db8b09..cae06e6 100644
>  > --- a/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
>  > +++ b/package/x11r7/xserver_xorg-server/xserver_xorg-server.mk
>  > @@ -144,7 +144,9 @@ ifeq ($(BR2_PACKAGE_FREETYPE),y)
>  >  XSERVER_XORG_SERVER_DEPENDENCIES += freetype
>  >  endif
>  > -ifeq ($(BR2_PACKAGE_LIBUNWIND),y)
>  > +# libunwind support is broken on mips64
>  > +# https://www.libreoffice.org/bugzilla/show_bug.cgi?id=79939
> 
> This doesn't have anything to do with libreoffice. That URL is
> apparently an alias for bugs.freedesktop.org (the official bugtracker
> for xorg), so I've used that as URL instead.
> 
> 
>  > +ifeq ($(BR2_PACKAGE_LIBUNWIND)$(BR2_mips64el),y)
>  >  XSERVER_XORG_SERVER_DEPENDENCIES += libunwind
> 
> That's not good as builds on mips64el WITHOUT libunwind now ends up
> pulling in libunwind (and breaking the build).
> 
> We need to match on LIBUNWIND and !mips64el, so there needs so be a
> seperator in between, like:
> 
> ifeq ($(BR2_PACKAGE_LIBUNWIND)-$(BR2_mips64el),y-)
> 
> Even if it looks a bit odd.
> 
> Committed with those fixes, thanks.
> 

as you may see in the bug report, I'm the one who reported the bug.

https://bugs.freedesktop.org/show_bug.cgi?id=79939

Xorg with libunwind support is broken for MIPS64 n32, but MIPS64 n64 is
ok, so disabing libunwind support for mips64el is wrong.

Also, I'm trying to fix the problem in libunwind. I reported the bug and
sent a patch which we are discussing right now:

https://savannah.nongnu.org/bugs/?43695

Cheers,
-- 
Vicente Olivert Riera
Graduate Software Engineer, MIPS Platforms
Imagination Technologies Limited
t: +44 (0)113 2429814
www.imgtec.com