ld for ia64-hp-openvms target

ld for ia64-hp-openvms target

[David SAUVAGE - AdaLabs Ltd]

Hello,

using binutils-2.24, I am trying to get more information about ld for 
ia64-hp-openvms target

In the binutils Changelog file, we can read (2012-03-19, TG)
* configure.ac (ia64*-*-*vms*): Add support for ld.

but in configure.ac, we have
  ia64*-*-*vms*)
     # No ld support yet.
     noconfigdirs="$noconfigdirs libgui itcl ld"

Any information, vision, advises concerning how to bring/get ld for this 
target is most welcome.

Regards,


-- 

David SAUVAGE

Software Agile Architect, Director
AdaLabs Ltd - Mauritius
http://adalabs.com
+230 542 818 32
skype sauvaged
BRN C10097052

Re: ld for ia64-hp-openvms target

[Andreas Schwab]

David SAUVAGE - AdaLabs Ltd <david.sauvage@adalabs.com> writes:

> Hello,
>
> using binutils-2.24, I am trying to get more information about ld for
> ia64-hp-openvms target
>
> In the binutils Changelog file, we can read (2012-03-19, TG)
> * configure.ac (ia64*-*-*vms*): Add support for ld.

This part has been reverted by
<http://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=7ec59b9>.

> Any information, vision, advises concerning how to bring/get ld for this
> target is most welcome.

You'll probably just have to reinstall the change.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."

Re: ld for ia64-hp-openvms target

[David SAUVAGE - AdaLabs Ltd]

On 03/17/2015 02:42 PM, Andreas Schwab wrote:
> [..]
> You'll probably just have to reinstall the change.
>

Thanks for your feedback Andreas,

using binutils 2.23.1, ia64-hp-openvms-ld is created successfully but I 
have some errors [1]

I don't know if it is preferable to re-introduce the removed feature to 
binutils-2.24, or to go from past binutils commits.

Any advises are most welcome,

[1]
/tmp/file.s:2: Error: unknown pseudo-op: `.pred.safe_across_calls'
/tmp/file.s:4: Fatal error: bad .section directive: want a,l,w,x,M,S,G,T 
in string

-- 

David

Re: ld for ia64-hp-openvms target

[Tristan Gingold]

> On 17 Mar 2015, at 15:36, David SAUVAGE - AdaLabs Ltd <david.sauvage@adalabs.com> wrote:
> 
> On 03/17/2015 02:42 PM, Andreas Schwab wrote:
>> [..]
>> You'll probably just have to reinstall the change.
>> 
> 
> Thanks for your feedback Andreas,
> 
> using binutils 2.23.1, ia64-hp-openvms-ld is created successfully but I have some errors [1]
> 
> I don't know if it is preferable to re-introduce the removed feature to binutils-2.24, or to go from past binutils commits.
> 
> Any advises are most welcome,
> 
> [1]
> /tmp/file.s:2: Error: unknown pseudo-op: `.pred.safe_across_calls'
> /tmp/file.s:4: Fatal error: bad .section directive: want a,l,w,x,M,S,G,T in string

What is your input file ?  Does it work with gas for ia64-linux ?

Re: ld for ia64-hp-openvms target

[David SAUVAGE - AdaLabs Ltd]

On 03/17/2015 07:00 PM, Tristan Gingold wrote:
>> [1]
>> >/tmp/file.s:2: Error: unknown pseudo-op: `.pred.safe_across_calls'
>> >/tmp/file.s:4: Fatal error: bad .section directive: want a,l,w,x,M,S,G,T in string
> What is your input file ?  Does it work with gas for ia64-linux ?
>
There is an issue in my environment, seems the host /usr/bin/as was 
called instead of ia64-hp-openvms-as
ia64-hp-openvms-ld now output the following, which seems nice !

ia64-hp-openvms-ld: cannot find -limagelib
ia64-hp-openvms-ld: cannot find -lstarlet
ia64-hp-openvms-ld: cannot find -lsys$public_vectors

I will add on my todo list to add ld support for ia64*-*-*vms* on latest 
binutils, any main hidden issues concerning this ?

-- 

David

Re: ld for ia64-hp-openvms target

[Tristan Gingold]

> On 17 Mar 2015, at 20:42, David SAUVAGE - AdaLabs Ltd <david.sauvage@adalabs.com> wrote:
> 
> On 03/17/2015 07:00 PM, Tristan Gingold wrote:
>>> [1]
>>> >/tmp/file.s:2: Error: unknown pseudo-op: `.pred.safe_across_calls'
>>> >/tmp/file.s:4: Fatal error: bad .section directive: want a,l,w,x,M,S,G,T in string
>> What is your input file ?  Does it work with gas for ia64-linux ?
>> 
> There is an issue in my environment, seems the host /usr/bin/as was called instead of ia64-hp-openvms-as
> ia64-hp-openvms-ld now output the following, which seems nice !
> 
> ia64-hp-openvms-ld: cannot find -limagelib
> ia64-hp-openvms-ld: cannot find -lstarlet
> ia64-hp-openvms-ld: cannot find -lsys$public_vectors

You have to import these libraries from a VMS system.

> I will add on my todo list to add ld support for ia64*-*-*vms* on latest binutils, any main hidden issues concerning this ?

AFAIK, no.  The ia64-openvms port of GNU ld was only for cross.  Do not expect command line compatibility with VMS link.

Re: ld for ia64-hp-openvms target

[David SAUVAGE - AdaLabs Ltd]

On 03/18/2015 12:45 PM, Tristan Gingold wrote:

>> I will add on my todo list to add ld support for ia64*-*-*vms*   on latest binutils, any main hidden issues concerning this ?
> AFAIK, no.  The ia64-openvms port of GNU ld was only for cross.  Do not expect command line compatibility with VMS link.
>
What would be the major issues using GNU ld in an ia64-hp-openvms native context ?
A layer on top of GNU ld could manage the command line compatibility.

-- David

Re: ld for ia64-hp-openvms target

[Tristan Gingold]

> On 19 Mar 2015, at 17:54, David SAUVAGE - AdaLabs Ltd <david.sauvage@adalabs.com> wrote:
> 
> On 03/18/2015 12:45 PM, Tristan Gingold wrote:
> 
>>> I will add on my todo list to add ld support for ia64*-*-*vms*   on latest binutils, any main hidden issues concerning this ?
>> AFAIK, no.  The ia64-openvms port of GNU ld was only for cross.  Do not expect command line compatibility with VMS link.
>> 
> What would be the major issues using GNU ld in an ia64-hp-openvms native context ?

I don't see any good reasons for that work, except for the purpose of having a native free linker on openvms.  So the real question is: what's the aim ?


> A layer on top of GNU ld could manage the command line compatibility.

There is more than command line compatibility: feature compatibility.  OpenVMS object files have many features that don't exit on unix/linux.  GNU ld 'works' as a cross linker because object files created by gcc are very simple (in term of features).

Tristan.

Re: ld for ia64-hp-openvms target

[David SAUVAGE - AdaLabs Ltd]

On 03/18/2015 12:45 PM, Tristan Gingold wrote:
>> ia64-hp-openvms-ld: cannot find -limagelib
>> >ia64-hp-openvms-ld: cannot find -lstarlet
>> >ia64-hp-openvms-ld: cannot find -lsys$public_vectors
> You have to import these libraries from a VMS system.
>


I imported the 3 of them from VMS by using copy and zip them before 
transfer to Unix.

While the cross ld _seems_ to correctly process imagelib.exe and 
starlet.exe, a segfault is raised while processing 
sys$public_vectors.exe [1]

Did you took sys$public_vectors.exe 'as it is' from VMS or did you 
rework/transform/.../ it ?

[1]
binutils-2.23.1/elf64-ia64-vms.c
A.
in function elf64_vms_link_add_object_symbols htab->dynobj has NULL 
value in the call to elf64_ia64_create_dynamic_sections
B.
Moreover in function elf64_ia64_create_dynamic_sections elf_hash_table 
(info)->dynobj also has NULL value

Any idea why both htab->dynobj and elf_hash_table (info)->dynobj has 
NULL value ?

Thanks


-- 

David SAUVAGE

Software Agile Architect, Director
AdaLabs Ltd - Mauritius
http://adalabs.com
+230 542 818 32
skype sauvaged
BRN C10097052

Re: ld for ia64-hp-openvms target

[Tristan Gingold]

> On 23 Apr 2015, at 15:15, David SAUVAGE - AdaLabs Ltd <david.sauvage@adalabs.com> wrote:
> 
> On 03/18/2015 12:45 PM, Tristan Gingold wrote:
>>> ia64-hp-openvms-ld: cannot find -limagelib
>>> >ia64-hp-openvms-ld: cannot find -lstarlet
>>> >ia64-hp-openvms-ld: cannot find -lsys$public_vectors
>> You have to import these libraries from a VMS system.
>> 
> 
> 
> I imported the 3 of them from VMS by using copy and zip them before transfer to Unix.
> 
> While the cross ld _seems_ to correctly process imagelib.exe and starlet.exe, a segfault is raised while processing sys$public_vectors.exe [1]
> 
> Did you took sys$public_vectors.exe 'as it is' from VMS or did you rework/transform/.../ it ?

No, I didn’t transform it.

> [1]
> binutils-2.23.1/elf64-ia64-vms.c
> A.
> in function elf64_vms_link_add_object_symbols htab->dynobj has NULL value in the call to elf64_ia64_create_dynamic_sections
> B.
> Moreover in function elf64_ia64_create_dynamic_sections elf_hash_table (info)->dynobj also has NULL value
> 
> Any idea why both htab->dynobj and elf_hash_table (info)->dynobj has NULL value ?

Not out of mind.  Needs a little bit of investigation :-(