GCC 4.4.0-tdm-1 for MinGW (with installer)

[Biplab]

Excuse me, What does the ICE means?
Thanks.

Internal Compiler Error, if I'm not wrong.

[ollydbg]

It seems some DLL support OpenMP are lost in the new TDM GCC 4.4 release. ( It works fine in the TDM GCC 4.3.3)

Hi, I just generate the OpenCV library with OpenMP enabled. But it seems that a DLL file is lost. See the dependencies below.





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[Jenna]

Excuse me, What does the ICE means?
Thanks.

Internal Compiler Error

[ollydbg]

I understand.
Thanks to jens and Biplab.

[TDragon]

However, as described above, I found out that -fcaller-saves (which O2, O3, Os enable) is the culprit. Explicitely disabling caller saves makes the ICE go away. This might possibly give someone interested in the problem a clue where to look.

Alternatively, is there a way to tell gcc not to install signal handlers? Since it reports a segfault, this should actually kick off the just-in-time debugger if gcc didn't catch the exception, so I should be able to get a core dump.

Normally with an ICE GCC reports the line number and function within its own source; is that not happening?

It seems some DLL support OpenMP are lost in the new TDM GCC 4.4 release. ( It works fine in the TDM GCC 4.3.3)

Hi, I just generate the OpenCV library with OpenMP enabled. But it seems that a DLL file is lost. See the dependencies below.

It wouldn't really be so hard to do a search in the MinGW directory for libgomp-1.dll, would it? Check lib/gcc/mingw32/bin.

[thomas]

Normally with an ICE GCC reports the line number and function within its own source; is that not happening?

Afraid not
This is the complete thing (include paths etc. elided):
mingw32-g++-dw2.exe -O2 -Wall -g -fno-rtti -mfpmath=sse,387 -fbranch-target-load-optimize -pipe -march=core2 -msse2 -ftree-vectorize -ffast-math -funit-at-a-time -std=gnu++0x -U__STRICT_ANSI__ -funsafe-loop-optimizations -Wunsafe-loop-optimizations -Wall -Wextra -Wnon-virtual-dtor -Wfloat-equal -Wno-missing-field-initializers -Wno-multichar -Wcast-align -Wstrict-aliasing -Wshadow   -I (...)  -c (...) -o (...)
H:\checkout\mtc\trunk\sys\system.cpp: In function 'bool sys::init()':
H:\checkout\mtc\trunk\sys\system.cpp:177: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://www.tdragon.net/recentgcc/bugs.php> for instructions.
Process terminated with status 1 (0 minutes, 2 seconds)

[TDragon]

Well, if you posted the file I would be happy to try to narrow it down to a simple test case.

Also, this page has info on debugging a GCC segfault. TDM-GCC is compiled with --enable-checking=release (the default for upstream releases), but without -g and with -O2, so there may not be much else to be discovered without using a debug build of GCC.

[ollydbg]

It wouldn't really be so hard to do a search in the MinGW directory for libgomp-1.dll, would it? Check lib/gcc/mingw32/bin.

Shame on me !
It's there, Thanks for your help!

Edit

Why not move these DLLs from

MinGW/lib/gcc/mingw32/bin

to

MinGW/bin

Thanks.

[killerbot]

Here's an issue I also discovered in a TDM 4.3.x.

When I compile some simple code I get errors on GCC's own headers [I don't have this with the latest MinGW 4.2.1], the issue also does not occur on linux (4.3.1).

In file included from c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/bits/postypes.h:42,
                 from c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/iosfwd:42,
                 from c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/ios:39,
                 from c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/istream:40,
                 from c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/sstream:39,
                 from C:\view_vipnt_buildserver\vipnt\Codec\src\CodecDisplay.cpp:1:
c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:159: error: '::swprintf' has not been declared
c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:166: error: '::vswprintf' has not been declared

I can only get it to work when I use the following warning options :

Code Select Expand


-Winit-self -Wredundant-decls -Wcast-align -Wundef -Wfloat-equal -Winline -Wmissing-declarations -Wmissing-include-dirs -Wswitch-enum -Wswitch-default -pedantic -Wextra -Wall

-Winit-self -Wredundant-decls -Wcast-align -Wundef -Wfloat-equal -Winline -Wmissing-declarations -Wmissing-include-dirs -Wswitch-enum -Wswitch-default -pedantic -Wextra -Wall

Normally I use :

Code Select Expand


-Winit-self -Wredundant-decls -Wcast-align -Wundef -Wfloat-equal -Winline -Wmissing-declarations -Wmissing-include-dirs -Wswitch-enum -Wswitch-default -pedantic -std=c++98 -Wextra -Wall -ansi


So the moment I add any of these the error already occurs :
-std=c++98
-ansi

Is there any chance this can be fixed ??

[thomas]

Try this: -std=c++98 -U__STRICT_ANSI__.

Strict ANSI mode which all of the -std= options enable is pretty useless insofar as it disables 90% of CRT, at no benefit. However, you can get MinGW to compile your code using the respective standard without going into moron mode by undefining that macro in said manner.

[drac]

c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:159: error: '::swprintf' has not been declared
c:\mingw\bin\../lib/gcc/mingw32/4.4.0/include/c++/cwchar:166: error: '::vswprintf' has not been declared

You need to patch the cwchar header, others have done it http://www.nabble.com/-ANN--GCC-4.4.0-Released-td23207147.html

With that patch you can compile this new C++0x hello program (g++ hello.cpp -o hello.exe -std=c++0x)

Code Select Expand

#include <iostream>
#include <vector>

int main()
{
  std::vector<char> v = {
0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x43, 0x2b,
0x2b, 0x30, 0x78, 0x20, 0x57, 0x6f, 0x72, 0x6c,
0x64, 0x21 };
 
  for (auto it = v.begin(); it != v.end(); ++it)
  {
    std::cout << *it;
  }
 
  std::cout << std::endl;
}

C++0x is cool!

[killerbot]

I can confirm Thomas' suggestion works :-)

So I now have among the previously working options :
  -std=c98++ -ansi -U__STRICT_ANSI__

What will be the real difference, with this being undefined, with respect to ensuring portable codes and very little extensions creeping in from gcc ?

How save is the workaround of just commenting out the 2 offending lines ? Is this something that will make it in the official (mingw)-gcc ??

[TDragon]

Rather than commenting out the two lines in cwchar, surround them with #ifndef __STRICT_ANSI__/#endif. This is actually the correct fix for the problem, which I believe is merely a small oversight. This issue should be discussed with the mingw-runtime maintainer and then forwarded to GCC (probably Danny Smith).

[sahasranaman]

I have been trying this for some time. I installed from the latest bundled installer, then I've got the new -2 packages seperately, still I keep getting the error. By the way, I'm linking with libsigc++, which was actually built using MinGW GCC 3.4.5. I'm pasting the error. Could someone help?

Code Select Expand


g++.exe -o dist/Debug/MinGW-Windows/urllib__ build/Debug/MinGW-Windows/urllibpp.o build/Debug/MinGW-Windows/main.o -L/C/Python26/libs -L/C/msys/1.0/local/lib -L../gtk+/lib -L/c/mingw/lib/gcc/mingw32/4.4.0 -lglibmm-2.4.dll -lpython26 -lboost_python-mgw44-mt-1_38 -lsigc-2.0 -lglib-2.0.dll
c:/mingw/lib/gcc/mingw32/4.4.0/libgcc_eh.a(unwind-sjlj.o): In function `Unwind_SjLj_Unregister':
d:\crossdev\b4.4.0-tdm-1\mingw32\libgcc/../../../gcc-4.4.0/libgcc/../gcc/unwind-sjlj.c:189: multiple definition of `_Unwind_SjLj_Unregister'
c:/msys/1.0/local/lib/libsigc-2.0.dll.a(d000019.o):(.text+0x0): first defined here
c:/mingw/lib/gcc/mingw32/4.4.0/libgcc_eh.a(unwind-sjlj.o): In function `Unwind_SjLj_Register':
d:\crossdev\b4.4.0-tdm-1\mingw32\libgcc/../../../gcc-4.4.0/libgcc/../gcc/unwind-sjlj.c:142: multiple definition of `_Unwind_SjLj_Register'
c:/msys/1.0/local/lib/libsigc-2.0.dll.a(d000016.o):(.text+0x0): first defined here
c:/mingw/lib/gcc/mingw32/4.4.0/libgcc_eh.a(unwind-sjlj.o): In function `Unwind_SjLj_Resume':
d:\crossdev\b4.4.0-tdm-1\mingw32\libgcc/../../../gcc-4.4.0/libgcc/../gcc/unwind.inc:220: multiple definition of `_Unwind_SjLj_Resume'
c:/msys/1.0/local/lib/libsigc-2.0.dll.a(d000017.o):(.text+0x0): first defined here
collect2: ld returned 1 exit status


[TDragon]

Seems like libsigc-2.0.dll.a was actually built with the first release of 4.4.0-tdm-1, or some other build that doesn't properly hide the _Unwind_* symbols. Whatever the case, it needs to be rebuilt, preferably with 4.4.0-tdm-1 r2.