[Bug plugins/47223] New: Fail to build gcc 4.6.0 (r168594) on mingw32

[Bug plugins/47223] New: Fail to build gcc 4.6.0 (r168594) on mingw32

[coolypf at qq dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

           Summary: Fail to build gcc 4.6.0 (r168594) on mingw32
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: plugins
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: coolypf@qq.com


configured with '--disable-shared'
so lto-plugin built as static library
when configuring target libgcc
failed with 'liblto_plugin-0.dll not found' error

I think there is something wrong with the option checking in gcc/gcc.c (line
6812)
LTOPLUGINSONAME is invalid when configured with '--disable-shared'
because there is no dynamic library

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[d.g.gorbachev at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #1 from Dmitry Gorbachev <d.g.gorbachev at gmail dot com> 2011-01-08 14:01:47 UTC ---
Try to configure with `--disable-shared --enable-shared=lto-plugin'.

Re: [Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[Jan Hubicka]

What is the failure?

Honza

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #2 from Jan Hubicka <hubicka at ucw dot cz> 2011-01-08 14:38:20 UTC ---
What is the failure?

Honza

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[coolypf at qq dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #3 from coolypf <coolypf at qq dot com> 2011-01-08 14:42:14 UTC ---
(In reply to comment #2)
> What is the failure?
> 
> Honza

when configuring target-libgcc,
failed with xgcc cannot create executable
config.log shows 'liblto_plugin-0.dll not found'
maybe -fuse-linker-plugin option not handled correctly

Re: [Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[Jan Hubicka]

> when configuring target-libgcc,
> failed with xgcc cannot create executable
> config.log shows 'liblto_plugin-0.dll not found'
> maybe -fuse-linker-plugin option not handled correctly

Yes, it seems that linker plugin handling on cygwin is not done well.
Is linker plugin built for you and does the linker support it?

Honza

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #4 from Jan Hubicka <hubicka at ucw dot cz> 2011-01-08 14:56:10 UTC ---
> when configuring target-libgcc,
> failed with xgcc cannot create executable
> config.log shows 'liblto_plugin-0.dll not found'
> maybe -fuse-linker-plugin option not handled correctly

Yes, it seems that linker plugin handling on cygwin is not done well.
Is linker plugin built for you and does the linker support it?

Honza

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[coolypf at qq dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #5 from coolypf <coolypf at qq dot com> 2011-01-08 15:05:29 UTC ---
(In reply to comment #4)
> > when configuring target-libgcc,
> > failed with xgcc cannot create executable
> > config.log shows 'liblto_plugin-0.dll not found'
> > maybe -fuse-linker-plugin option not handled correctly
> 
> Yes, it seems that linker plugin handling on cygwin is not done well.
> Is linker plugin built for you and does the linker support it?
> 
> Honza

lto and linker plugin was OK in 20110101 snapshot
in which '-fuse-linker-plugin' was off by default
but in rev 168594, the option becomes on by default

this option causes checking LTOPLUGINSONAME in gcc/gcc.c (line
6812 around), which is not built with '--disable-shared'

something is wrong either with makefile or with gcc/gcc.c

Re: [Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[Jan Hubicka]

> lto and linker plugin was OK in 20110101 snapshot
> in which '-fuse-linker-plugin' was off by default
> but in rev 168594, the option becomes on by default

Yes, I've changed the default when linker is detected to have linker support and
lto-plugin is build.
> 
> this option causes checking LTOPLUGINSONAME in gcc/gcc.c (line
> 6812 around), which is not built with '--disable-shared'
> 
> something is wrong either with makefile or with gcc/gcc.c
How this worked before?
On windows I would expect LTOPLUGINSONAME to point to the plugin DLL...

Honza

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #6 from Jan Hubicka <hubicka at ucw dot cz> 2011-01-08 15:17:54 UTC ---
> lto and linker plugin was OK in 20110101 snapshot
> in which '-fuse-linker-plugin' was off by default
> but in rev 168594, the option becomes on by default

Yes, I've changed the default when linker is detected to have linker support
and
lto-plugin is build.
> 
> this option causes checking LTOPLUGINSONAME in gcc/gcc.c (line
> 6812 around), which is not built with '--disable-shared'
> 
> something is wrong either with makefile or with gcc/gcc.c
How this worked before?
On windows I would expect LTOPLUGINSONAME to point to the plugin DLL...

Honza

Re: [Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[Jan Hubicka]

Hi,
is this dup of PR47225?  I.e. is the --disable-shared the problem?

Honza

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #7 from Jan Hubicka <hubicka at ucw dot cz> 2011-01-08 18:58:46 UTC ---
Hi,
is this dup of PR47225?  I.e. is the --disable-shared the problem?

Honza

Re: [Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[Jan Hubicka]

Hi,
I posed patch to the aforementioned PR, hopefully it will fix this one too.

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[hubicka at ucw dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

--- Comment #8 from Jan Hubicka <hubicka at ucw dot cz> 2011-01-08 19:16:09 UTC ---
Hi,
I posed patch to the aforementioned PR, hopefully it will fix this one too.

[Bug plugins/47223] Fail to build gcc 4.6.0 (r168594) on mingw32

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47223

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

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

--- Comment #9 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-01-11 13:04:30 UTC ---
dup

*** This bug has been marked as a duplicate of bug 47225 ***