9:38 a.m.
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Summary: No cross-DLL exceptions in mingw32 compilers
https://bugzilla.redhat.com/show_bug.cgi?id=489100
Summary: No cross-DLL exceptions in mingw32 compilers
Product: Fedora EPEL
Version: el5
Platform: All
OS/Version: Linux
Status: NEW
Severity: high
Priority: low
Component: mingw32-gcc
AssignedTo: rjones(a)redhat.com
ReportedBy: wolfgang.glas(a)ev-i.at
QAContact: extras-qa(a)fedoraproject.org
CC: lfarkas(a)lfarkas.org, berrange(a)redhat.com,
rjones(a)redhat.com,
fedora-mingw(a)lists.fedoraproject.org
Classification: Fedora
Version 4.3.2-12 of EPEL's version of the moingw32 cross-compiler do not
support cross-DLL exceptions.
I've attached the gcc bug report below. This make running a non-trivial C++
program impossible an renders the mingw32 toolchain unusable for real-world C++
programs.
The mingw-w64 toolchain has solved this problem by supplying a shared libgcc,
hopefully the mingw32 toolchain will follow this approach in the near future.
Please keep on your tremendous work on providing the ming32 toolchain in the
EPEL.
TIA,
Wolfgang
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9:44 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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Wolfgang Glas <wolfgang.glas(a)ev-i.at> changed:
What |Removed |Added
----------------------------------------------------------------------------
External Bug ID| |Debian BTS 451438
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9:46 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #1 from Levente Farkas <lfarkas(a)lfarkas.org> 2009-03-07 10:46:45 EDT
---
can you give us a little bit more detail!?
anyway there is _not_ any kind of standard c++ exception on windows each
compiler has it's own exception handling. so it you use gcc for every dll what
you use than it'll work. more detail here:
http://lists.fedoraproject.org/pipermail/fedora-mingw/2008-November/00003...
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10:06 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #2 from Wolfgang Glas <wolfgang.glas(a)ev-i.at> 2009-03-07 11:06:50 EDT
---
Created an attachment (id=334400)
--> (https://bugzilla.redhat.com/attachment.cgi?id=334400)
A testcaes, which trowas an exception across a DLL boundary.
This testcase throw an exception from iside a DLL an catches it in the main
program. The generated 64 bit executables of mingw-w64 are working as expected.
The 32bit executables fail with
terminate called after throwing an instance of 'MyException'
BTW, I'm only using C++ programs which are all compiled by the same version of
gcc.
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10:11 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #3 from Richard W.M. Jones <rjones(a)redhat.com> 2009-03-07 11:11:10 EDT
---
Thanks for the test case - it's definitely good to have a way to test whether
what we're
doing is correct.
Do you know about the (to me) "mysterious" DLL that gcc 4.4 installs?
/usr/i686-pc-mingw32/sys-root/mingw/bin/libgcc_s_sjlj-1.dll
Does it help, hinder or is it irrelevant?
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10:24 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #4 from Wolfgang Glas <wolfgang.glas(a)ev-i.at> 2009-03-07 11:24:02 EDT
---
According to my experience with mingw-w64, which is gcc-4.4 based, this DLL is
referenced by all my C++ DLLs compiled with mingw-w64 and to my knowledge this
DLL is the key to cross-DLL exception handling. (contains some _Unwind_* export
functions...)
Since I'm not a specialist in this area you might ask the mingw-w64 people for
further explanations, since these guys seem to be the driving force behind the
gcc-4.4/mingw integration.
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8:47 p.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #5 from Kevin Kofler <kevin(a)tigcc.ticalc.org> 2009-03-07 21:47:46 EDT
---
Do you know about the (to me) "mysterious" DLL that gcc 4.4
installs?
/usr/i686-pc-mingw32/sys-root/mingw/bin/libgcc_s_sjlj-1.dll
Does it help, hinder or is it irrelevant?
That's a shared libgcc (plus, it's using sjlj, not DWARF2 which currently
doesn't work across DLLs unless this was solved somehow recently), so it should
fix the issue.
Note that the bug report was about 4.3.2, not 4.4, so it's quite possible 4.4
fixes it.
One thing to check is whether static or shared libgcc is the default. If it's
static, you'll also need to compile both the DLL and the executable with
-shared-libgcc to make it work.
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2:56 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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Gianluca Sforna <giallu(a)gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |giallu(a)gmail.com
--- Comment #6 from Gianluca Sforna <giallu(a)gmail.com> 2009-03-09 03:56:19 EDT ---
AFAIK this problem is one of the reasons (if not _the_ reason) why the MinGW
project is sticking with gcc 3.4.5 instead of upgrading to the 4.x serie.
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11:04 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #7 from Richard W.M. Jones <rjones(a)redhat.com> 2009-03-09 12:04:50 EDT
---
(In reply to comment #6)
AFAIK this problem is one of the reasons (if not _the_ reason) why
the MinGW
project is sticking with gcc 3.4.5 instead of upgrading to the 4.x serie.
It's Fedora policy to follow upstream (and fix upstream if it's
broken!)
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11:31 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #8 from Wolfgang Glas <wolfgang.glas(a)ev-i.at> 2009-03-09 12:31:45 EDT
---
I'm currently trying the gcc-4.4 based mingw-w32 toolchain from the mingw-w64
project. As with their 64bit toolchain they solved the cross-DLL exception
problem there by introducing libgcc_s_sjlj-1.dll.
However, gcc-4.4 seems to introduce some new instabilities I'm currently trying
to trace. So I think everybody would be happy if the fedora mingw team and the
mingw-w64 people could join their forces to make gcc-4.4+mingw a success story
;-)
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2:57 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #9 from Gianluca Sforna <giallu(a)gmail.com> 2009-03-10 03:57:46 EDT ---
(In reply to comment #7)
It's Fedora policy to follow upstream (and fix upstream if
it's
broken!)
My remark was not intended to be a proposal to downgrade, just a statement
about why this was a more or less expected problem. If we can fix the issue,
good, it will show a real benefit of Fedora-MinGW effort.
However, given how much time this problem is around, I wonder if it's that easy
to fix... Do we have resident (@redhat) experts in the field to ask?
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4:04 a.m.
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--- Comment #10 from Kevin Kofler <kevin(a)tigcc.ticalc.org> 2009-03-10 05:04:24 EDT
---
It is already fixed, see comment #8. It will be fixed in Fedora when the
packages will be upgraded to 4.4. (In Rawhide, that already happened.)
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2:59 p.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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--- Comment #11 from Wolfgang Glas <wolfgang.glas(a)ev-i.at> 2009-03-15 15:59:42 EDT
---
Please note, that the mingw-w64 people have now fixed a nasty stability problem
in their mingw-w64 distribution (not affecting 32 bit binaries), so gcc-4.4 for
Windows x8 and x64 seems to be quite stable now ;-)
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1:04 p.m.
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Michael Stahnke <mastahnke(a)gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |mastahnke(a)gmail.com
Status Whiteboard| |ActualBug
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8:31 p.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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Hin-Tak Leung <htl10(a)users.sourceforge.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |htl10(a)users.sourceforge.net
--- Comment #12 from Hin-Tak Leung <htl10(a)users.sourceforge.net> 2009-08-29
21:31:13 EDT ---
Note upstream at mingw has released some 12/13 patches for gcc 4.4.0 in June,
and also recommend dwarf2 instead of sjlj...
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7:54 a.m.
New subject: [Bug 489100] No cross-DLL exceptions in mingw32 compilers
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Aravind vijayan <aravindvijayan224185(a)gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |CLOSED
CC| |aravindvijayan224185@gmail.
| |com
Resolution| |ERRATA
Last Closed| |2011-12-29 08:54:43
--- Comment #13 from Aravind vijayan <aravindvijayan224185(a)gmail.com> 2011-12-29
08:54:43 EST ---
I believe this bug was fixed in an upstream:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34684, so let me change the flag
as:CLOSED/ERRATA , feel free to reopen this bug if u still experiencing this
problem.
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