Re: [Mingw-cross-env-list] Re: GCC 4.5 (was URL problems)

[Mark Brand]

> I did a quick diff of the qt logs, and there seems to be three differences:
>
> 1) In some places GCC4.4.0 uses -fexceptions -mthreads -frtti
>                     where GCC4.5 uses -fno-exceptions -fno-rtti
> (without -mthreads)

Great idea. It inspired me to do the same experiment.  I don't see the 
difference you describe in 1). That's a bit puzzling. Could this be 
because we are working on different platforms? I am using 64-bit 
opensuse Linux.  The detection of rtti support is added to the Qt 
configure script by a mingw-cross-env patch. I'm curious about what the 
rtti detection does on your system with gcc 4.4 and 4.5. Here the test 
is positive as expected in both cases. For gcc 4.5:

rtti auto-detection... ()
gmake[2]: Entering directory 
`/home/brand/projects/mingw-cross-env.dev/x/tmp-qt/qt-everywhere-opensource-src-4.6.2/config.tests/unix/rtti'
i686-pc-mingw32-g++ -c -isystem 
/home/brand/projects/mingw-cross-env.dev/x/usr/i686-pc-mingw32/include 
-pipe -frtti -O2 -Wall -fno-exceptions -fno-rtti -DUNICODE -DQT_TABLET 
-DQT_SESSIONMANAGER -DQT_NO_DIRECT3D -DQT_NO_CODECS -DQT_NEEDS_QMAIN 
-DQT_NO_DYNAMIC_CAST -I"." -I"../../../mkspecs/win32-g++" -o rtti.o rtti.cpp
i686-pc-mingw32-g++ -enable-stdcall-fixup -Wl,-enable-auto-import 
-Wl,-enable-runtime-pseudo-reloc -Wl,-s -Wl,-subsystem,windows -o 
rtti.exe rtti.o
gmake[2]: Leaving directory 
`/home/brand/projects/mingw-cross-env.dev/x/tmp-qt/qt-everywhere-opensource-src-4.6.2/config.tests/unix/rtti'
rtti enabled.


> 2) GCC 4.5 has slightly different warning strings
> 3) GCC 4.5 terminates earlier with errors

Yes, I see this do. Nothing looks problematic.


regards,

Mark