[OE-core] [PATCH] directfb.inc: force bfd linker for armv7a

[Andre McCurdy]

On Tue, Nov 17, 2015 at 11:34 AM, Andre McCurdy <armccurdy at gmail.com> wrote:
> On Tue, Nov 17, 2015 at 11:16 AM, Andre McCurdy <armccurdy at gmail.com> wrote:
>> On Tue, Nov 17, 2015 at 9:09 AM, Phil Blundell <pb at pbcl.net> wrote:
>>> On Tue, 2015-11-17 at 16:44 +0000, Burton, Ross wrote:
>>>
>>> On 17 November 2015 at 15:16, Phil Blundell <pb at pbcl.net> wrote:
>>>
>>> Does the resulting directfb-csource binary actually work with that
>>> change?  My recollection is that ld.bfd will just silently permit
>>> relocs that gold (correctly) refuses to allow.
>>>
>>> Personally I don't use DirectFB (and am constantly surprised it's still a
>>> thing) so at this point I'm not going to merge either of these patches until
>>> someone can confirm that their fix *works on hardware* instead of just
>>> fixing the build.
>>>
>>> I think that's a reasonable position.  In any case, the underlying issue is
>>> a compiler bug and ought really to be fixed there rather than patching
>>> directfb or any other package that just happens to fall over it.
>>
>> The directfb-csource binary linked with the bfd linker segfaults on
>> startup, so it does indeed look like a compiler problem.
>
> Hmmm... maybe I spoke too soon. lsmod is also segfaulting on startup
> so there's something else going wrong with this build.
>
> If I copy the same directfb-csource binary into a rootfs built with
> security_flags.inc enabled then it runs OK...

OK, so the segfaults were due to building Jethro with prelink enabled :-(

With prelink disabled, directfb-csource linked with the bfd linker
runs fine on real HW:

root at eos:~# cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 3 (v7l)
Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x42
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0x00f
CPU revision    : 3

processor       : 1
model name      : ARMv7 Processor rev 3 (v7l)
Features        : swp half thumb fastmult vfp edsp neon vfpv3 tls
vfpv4 idiva idivt vfpd32 lpae evtstrm
CPU implementer : 0x42
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0x00f
CPU revision    : 3

Hardware        : Broadcom STB (Flattened Device Tree)
Revision        : 0000
Serial          : 0000000000000000
root at eos:~#
root at eos:~# directfb-csource
directfb-csource version 1.7.7

Usage: directfb-csource [options] <imagefile>
   --name=<identifer>      specifies variable name
   --format=<identifer>    specifies surface format
   --rgbformat=<identifer> specifies format for non-alpha images
   --multi                 multiple images
   --raw                   dump a single file directly to header
   --dither-rgb16          dither images rendered to RGB16 surfaces
   --help                  show this help message
   --version               print version information

See the directfb-csource(1) man-page for more information.

root at eos:~#