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* [Bug libstdc++/52300] New: Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW.
@ 2012-02-17 20:26 i.nixman at gmail dot com
2012-02-19 17:14 ` [Bug libstdc++/52300] " ktietz at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: i.nixman at gmail dot com @ 2012-02-17 20:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52300
Bug #: 52300
Summary: Gthreads functions linking error at dynamic linking
with libstdc++ when using MinGW.
Classification: Unclassified
Product: gcc
Version: 4.6.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: i.nixman@gmail.com
When using std::threads for example, the program is compiled correctly. But
when running I get segfolts. If the program is linked with -static - all the
problem disappears.
If in the file gthr-posix.h I change this line:
> # If SUPPORTS_WEAK && GTHREAD_USE_WEAK
on this:
> # If SUPPORTS_WEAK && GTHREAD_USE_WEAK && !defined(__MINGW32__)
- the problem is solved.
Is there any way to fix this?
niXman.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug libstdc++/52300] Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW.
2012-02-17 20:26 [Bug libstdc++/52300] New: Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW i.nixman at gmail dot com
@ 2012-02-19 17:14 ` ktietz at gcc dot gnu.org
2012-02-19 17:20 ` i.nixman at gmail dot com
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: ktietz at gcc dot gnu.org @ 2012-02-19 17:14 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52300
Kai Tietz <ktietz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-02-19
CC| |ktietz at gcc dot gnu.org
Ever Confirmed|0 |1
--- Comment #1 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-02-19 17:12:13 UTC ---
As pe-coff doesn't have fully compatible support for weaks to ELF ones, we
should disable it. In static version it works, but when used in shared variant
it doesn't.
I suggest the following patch to solve this problem:
Index: gthr.h
===================================================================
--- gthr.h (revision 184333)
+++ gthr.h (working copy)
@@ -135,6 +135,14 @@
*/
#if SUPPORTS_WEAK
+/* The pe-coff weak support isn't fully compatible to ELF's weak.
+ For static libraries it might would work, but as we need to deal
+ with shared versions too, we disable it for mingw-targets. */
+#ifdef __MINGW32__
+#undef GTHREAD_USE_WEAK
+#define GTHREAD_USE_WEAK 0
+#endif
+
#ifndef GTHREAD_USE_WEAK
#define GTHREAD_USE_WEAK 1
#endif
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug libstdc++/52300] Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW.
2012-02-17 20:26 [Bug libstdc++/52300] New: Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW i.nixman at gmail dot com
2012-02-19 17:14 ` [Bug libstdc++/52300] " ktietz at gcc dot gnu.org
@ 2012-02-19 17:20 ` i.nixman at gmail dot com
2012-02-20 21:29 ` ktietz at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: i.nixman at gmail dot com @ 2012-02-19 17:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52300
--- Comment #2 from niXman <i.nixman at gmail dot com> 2012-02-19 17:14:03 UTC ---
Thanks Kai!
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug libstdc++/52300] Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW.
2012-02-17 20:26 [Bug libstdc++/52300] New: Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW i.nixman at gmail dot com
2012-02-19 17:14 ` [Bug libstdc++/52300] " ktietz at gcc dot gnu.org
2012-02-19 17:20 ` i.nixman at gmail dot com
@ 2012-02-20 21:29 ` ktietz at gcc dot gnu.org
2012-02-20 21:30 ` ktietz at gcc dot gnu.org
2012-02-20 21:40 ` ktietz at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ktietz at gcc dot gnu.org @ 2012-02-20 21:29 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52300
--- Comment #3 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-02-20 21:22:11 UTC ---
Author: ktietz
Date: Mon Feb 20 21:22:07 2012
New Revision: 184406
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184406
Log:
PR libstdc++/52300
* gthr.h (GTHREAD_USE_WEAK): Define as zero for mingw.
Modified:
trunk/libgcc/ChangeLog
trunk/libgcc/gthr.h
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug libstdc++/52300] Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW.
2012-02-17 20:26 [Bug libstdc++/52300] New: Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW i.nixman at gmail dot com
` (2 preceding siblings ...)
2012-02-20 21:29 ` ktietz at gcc dot gnu.org
@ 2012-02-20 21:30 ` ktietz at gcc dot gnu.org
2012-02-20 21:40 ` ktietz at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ktietz at gcc dot gnu.org @ 2012-02-20 21:30 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52300
--- Comment #4 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-02-20 21:28:41 UTC ---
Author: ktietz
Date: Mon Feb 20 21:28:36 2012
New Revision: 184408
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184408
Log:
PR libstdc++/52300
* gthr.h (GTHREAD_USE_WEAK): Define as zero for mingw.
Modified:
branches/gcc-4_6-branch/gcc/ChangeLog
branches/gcc-4_6-branch/gcc/gthr.h
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug libstdc++/52300] Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW.
2012-02-17 20:26 [Bug libstdc++/52300] New: Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW i.nixman at gmail dot com
` (3 preceding siblings ...)
2012-02-20 21:30 ` ktietz at gcc dot gnu.org
@ 2012-02-20 21:40 ` ktietz at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: ktietz at gcc dot gnu.org @ 2012-02-20 21:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52300
Kai Tietz <ktietz at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #5 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-02-20 21:29:21 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2012-02-17 20:26 [Bug libstdc++/52300] New: Gthreads functions linking error at dynamic linking with libstdc++ when using MinGW i.nixman at gmail dot com
2012-02-19 17:14 ` [Bug libstdc++/52300] " ktietz at gcc dot gnu.org
2012-02-19 17:20 ` i.nixman at gmail dot com
2012-02-20 21:29 ` ktietz at gcc dot gnu.org
2012-02-20 21:30 ` ktietz at gcc dot gnu.org
2012-02-20 21:40 ` ktietz at gcc dot gnu.org
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