Qt3 breakage since 1.5.19
Yaakov S (Cygwin Ports)
yselkowitz@users.sourceforge.net
Thu Feb 2 21:23:00 GMT 2006
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René Berber wrote:
> Running Scribus with the debug enabled cygqt-mt-3.dll the program
> works fine with no mutex failure message and using the latest Cygwin
> snapshot. As mentioned in my reply to Brian, under gdb there are many
> SIGSEGV signals received but continuing results in the same behaviour
> as above: no problem.
>
> So there seems to be no regression, there must be something different
> btw. the original build environment and my PC. I used the code (build
> script, patches and original code) downloaded using setup.exe.
OK, we need to get back to this. Now that cygwin-1.5.19-4 is out, I'm
seeing the same breakage with qt3-3.3.4:
$ scribus
Mutex init failure: Device or resource busy
[splashscreen shows, gets as far as loading plugins, then:]
Mutex init failure: Invalid argument
[exits silently]
$ convertall
[this is a PyQt app. It exits silently also.]
But not everything is affected apparently:
$ xxdiff file1 file2
Mutex init failure: Device or resource busy
[works, just like before]
Mutex lock failure: Invalid argument
Mutex unlock failure: Invalid argument
Mutex destroy failure: Invalid argument
1) Something changed between 1.5.18 and the 20051207 snapshot to break
qt3 threading.
2) It should not be necessary to have a debug library in order for
ordinary programs to work.
3) A threaded Qt is required for many packages, including KDE, so
disabling threading is not a viable option.
Ideas?
Yaakov
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