Am 14.05.12 10:13, schrieb Thiago Macieira:
> On segunda-feira, 14 de maio de 2012 10.03.47, Till Oliver Knoll wrote:
>> However I noticed a warning message in the console output which
>> appears just after the listen() call above:
>>
>> QSocketNotifier: Can only be used with threads started with QThread
>
> Run the sub-process with QT_FATAL_WARNINGS=1 and give us the backtrace of that
> warning.
Okay, I found the issue: it was indeed a wrong QtNetwork framework being
pulled in, because I forgot to add the proper "install_name_tool" steps
to one of my libraries, which was then linking with the QtNetwork
framework from the SDK installation, which on its turn linked in a
(duplicate) QtCore framework from the SDK as well etc.
So something along the line of
distribution.commands += install_name_tool -change
$$QT_LIB_DIR/QtNetwork.framework/Versions/4/QtNetwork \
@executable_path/../Frameworks/QtNetwork.framework/Versions/4/QtNetwork \
$$FRAMEWORKS_DIR/libKernel.$${VERSION}.dylib;
was missing.
And apparently classes which rely on QThread being properly initialised
don't like that ;)
So that's why it worked with the macdeployqt, and not with my own
"installation script".
I prefer to install just what I need with my own *.pro/qmake script - it
turns out that macdeployqt installs every possible framework, even the
SQL ones, even though I don't need them (contrary to what the Qt docs
states that only the necessary frameworks would be deployed according to
the QT/CONFIG values being set). Let alone all possible plugins that I
have no use of).
So putting it all together it seems to be possible to use
"QLocalServer-based IPC" (which indeed works without having a "network"
entitlement) in a Mac sandbox, as to have separate processes with
different entitlements.
This also means that the use of Apple's XPC services can be avoided:
https://developer.apple.com/library/mac/#documentation/MacOSX/Conceptual/BPSystemStartup/Chapters/CreatingXPCServices.html#//apple_ref/doc/uid/10000172i-SW6-SW1
They are only available since OS X 10.7, and would make the application
more platform-dependent.
Cheers, Oliver
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