[Bug lto/52401] New: lto can't handle ld script

[Bug lto/52401] New: lto can't handle ld script

[tianbin at cernet dot edu.cn]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52401

             Bug #: 52401
           Summary: lto can't handle ld script
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: tianbin@cernet.edu.cn


If an object file compiled with -flto is loaded by using ld script, the final
ld procedure will report multiple definition error.

$ cat a.c
int main (){return 0;}
$ cat a.ld
INPUT(a.o)
$ gcc -flto -c a.c
$ gcc -flto a.ld
/tmp/ccPbuiPm.ltrans0.ltrans.o: In function `main':
ccPbuiPm.ltrans0.o:(.text+0x0): multiple definition of `main'
a.o:a.c:(.text+0x0): first defined here
a.o: In function `main':
a.c:(.text+0x0): multiple definition of `main'
a.o:a.c:(.text+0x0): first defined here
collect2: error: ld returned 1 exit status

So far as I know, qt is using ld script for windows target if there are too
many object files to link.

[Bug lto/52401] lto can't handle ld script

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52401

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-02-27
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-27 14:55:07 UTC ---
Confirmed.  There are other cases with linker-scripts / linker options that
are not handled well.

This one is more a linker bug though.  The input a.o should be translated
to the new replacement input that went though LTO processing, instead it
seems to be appended.

Please file a binutils bug.

[Bug lto/52401] lto can't handle ld script

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52401

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-02-27 17:11:27 UTC ---
>So far as I know, qt is using ld script for windows target if there are too
many object files to link.

QT should also be changed to use response files which allows GCC to see the
object files also.

[Bug lto/52401] lto can't handle ld script

[tianbin at cernet dot edu.cn]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52401

--- Comment #3 from Bin Tian <tianbin at cernet dot edu.cn> 2012-02-28 02:59:03 UTC ---
(In reply to comment #1)
> Confirmed.  There are other cases with linker-scripts / linker options that
> are not handled well.
> 
> This one is more a linker bug though.  The input a.o should be translated
> to the new replacement input that went though LTO processing, instead it
> seems to be appended.
> 
> Please file a binutils bug.

http://sourceware.org/bugzilla/show_bug.cgi?id=13779

[Bug lto/52401] lto can't handle ld script

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52401

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |amodra at gmail dot com
         Resolution|---                         |WORKSFORME

--- Comment #4 from Alan Modra <amodra at gmail dot com> ---
Works with mainline ld.  Has been fixed for quite a while.