Syslinux - Feb 2016 - binutils (objcopy?) >= 2.26 breaks syslinux (bios) build

On 08.02.2016 19:04, H. Peter Anvin wrote:
> On 02/03/16 10:30, H. Peter Anvin via Syslinux wrote:
>> On February 3, 2016 7:17:37 AM PST, Celelibi <celelibi at
gmail.com> wrote:
>>> 2016-02-02 18:50 UTC+01:00, poma via Syslinux <syslinux at
zytor.com>:
>>>> On 30.01.2016 16:59, poma wrote:
>>>>> ...
>>>>>
>>>>> https://sourceware.org/bugzilla/show_bug.cgi?id=19538
>>>>>
>>>>>
>>>>
>>>> Mister Anvin,
>>>> care to share what's the status of the "ld?"
problemo,
>>>> is anyone working on it?
>>>>
>>>> It would be maravilloso if syslinux can continue to build and
test
>>> with
>>>> latest and greatest.
>>>
>>> There have been a discussion about the -fPIC option a few month ago
>>> (november or december 2015). I don't remember what exactly it
was
>>> about. I think I said I would submit a patch that add -fPIC for 32
>>> bits even thought it wouldn't have an actual effect regarding
current
>>> compilers.
>>>
>>> This option is definitely required for 64 bits, and it is
>>> theoretically required for 32 bits. But I haven't investigated
the
>>> current issue.
>>>
>>> Celelibi
>>
>> It isn't just 32 vs 64 bits, it is also 32 bit BIOS vs 32 bit EFI,
and their requirements differ.
>>
> 
> So here is the deal... syslinux.elf in the BIOS case is really an odd
> duck.  It has parts that are relocatable (and needs to export its
> symbols) and parts that aren't (and also needs to export at least some
> of its symbols.)
> 
> It might be that we need -Bdynamic rather than -pie, and perhaps some
> modification to the relocation code, but it could also be that ld needs
> a whack to the head.
> 
> 	-hpa
> 
s/LD_PIE = -pie/LD_PIE = -Bdynamic/

Failed to load ldlinux.c32
Boot failed: press a key to retry...
_

...
http://repo.or.cz/syslinux.git/commit/8750016

Booting from DVD/CD...

ISOLINUX 6.04  ETCD
and then hangs

ttyS0 debug shows single line:
_malloc(24, 0, 2) @ 0x00104bab 

$ ld --version
GNU ld version 2.26.20160125
...
$ gcc --version
gcc (GCC) 6.0.0 20160205 ...
...

On February 11, 2016 11:30:02 PM PST, poma <pomidorabelisima at gmail.com>
wrote:
>...
>http://repo.or.cz/syslinux.git/commit/8750016
>
>Booting from DVD/CD...
>
>ISOLINUX 6.04  ETCD
>and then hangs
>
>ttyS0 debug shows single line:
>_malloc(24, 0, 2) @ 0x00104bab >
>
>$ ld --version
>GNU ld version 2.26.20160125
>...
>$ gcc --version
>gcc (GCC) 6.0.0 20160205 ...
>...
Yes, it is a bug in ld.  I have been working with H.J. and we have just tracked
it down.
-- 
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