[syslinux] boot... round 2

[poma]

On 23.06.2015 01:27, Adam Williamson wrote:
> On Mon, 2015-06-22 at 14:57 -0700, Adam Williamson wrote:
>> On Mon, 2015-06-22 at 22:12 +0200, poma wrote:
>>> https://kojipkgs.fedoraproject.org/mash/rawhide/x86_64/os/images/
>>> boot.iso
>>>
>>> https://kojipkgs.fedoraproject.org/work/tasks/6196/10176196/
>>> Fedora-Live-Xfce-x86_64-rawhide-20150621.iso
>>>
>>> are broken at early boot stage - isolinux.
>>
>> syslinux got rebuilt with hardening:
>>
>> http://koji.fedoraproject.org/koji/buildinfo?buildID=662410
>>
>> note that the 6.03-3 build attempt on 2015-02-21 failed, so this was
>> actually the first successful build with the hardening change. I'd
>> guess that may be related. I'll try a build with the hardening 
>> removed.
> 
> So this is definitely some kind of Rawhide compiler configuration
> issue, I think. I rebuilt from the same .src.rpm (same as -4 but with
> "%undefine _hardened_build" added) twice, once for F23, once for F21,
> and created live images with both builds. The F23 one still doesn't
> boot - seems like "%undefine _hardened_build" isn't enough - but an F23
> live image with an F21 build of isolinux does boot.
> 
> I'll try and figure out the difference between the two builds.
> 


This hardening crap certainly breaking it
https://fedoraproject.org/wiki/Changes/Harden_All_Packages?rd=Changes/Harden_all_packages_with_position-independent_code


Peter, can you explain why this is happening?