[Bug bootstrap/104887] New: mold linker is not detected properly

[Bug bootstrap/104887] New: mold linker is not detected properly

[rui314 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104887

            Bug ID: 104887
           Summary: mold linker is not detected properly
           Product: gcc
           Version: 11.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rui314 at gmail dot com
  Target Milestone: ---

GCC 11.2.0 fails to bootstrap if `ld` is `ld.mold`
(https://github.com/rui314/mold). It is because gcc's configure script has no
idea as to what `ld.mold` is and consider it as a very old linker that doesn't
support COMDAT.

GCC 12's configure script correctly recognizes mold.

Can you backport the fix to support mold in the GCC 11 series?

[Bug bootstrap/104887] [9/10/11 only] mold linker is not detected properly

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104887

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|mold linker is not detected |[9/10/11 only] mold linker
                   |properly                    |is not detected properly
   Target Milestone|---                         |11.3

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>Can you backport the fix to support mold in the GCC 11 series?

I doubt it since it might cause other issues. Plus GCC 12 will be out in about
an month. Each distro can decide to backport it if they want though.

[Bug bootstrap/104887] [9/10/11 only] mold linker is not detected properly

[rui314 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104887

--- Comment #2 from Rui Ueyama <rui314 at gmail dot com> ---
What kind of regression are you worry about?

[Bug bootstrap/104887] [9/10/11 only] mold linker is not detected properly

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104887

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build
                 CC|                            |marxin at gcc dot gnu.org

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
We can consider backporting enough support to allow bootstrapping with mold,
but an actual decision whether to do that requires somebody to prepare and test
a (minmal) patch.

[Bug bootstrap/104887] [9/10/11 only] mold linker is not detected properly

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104887

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I also tend to not backport the support to GCC 11.x and older releases. As
Andrew mentioned, GCC 12.1 will be out in a month or so and even full LTO
support won't be covered in GCC 12.1. That was postponed for the next stage1.