Hello all,
First a disclaimer, I know very little about Mac OS specifics. I only have
a Mac to build my app for it.
I am porting two apps to Mac OS Mountain Lion and Qt5. The apps have run
fine on quite a few of the Qt4 series versions in Windows/Linux/Mac (Snow
Leopard). They both run fine in Qt5/Linux. I just installed the latest
Mountain Lion version with latest XCode. I've gotten them to compile by
running:
qmake -spec macx-xcode project.pro
xcodebuild
But two completely different programs both segfault on a simple line:
QFile file("file");
if(!file.open(QIODevice::ReadOnly | QIODevice::Text))
exit(0);
QTextStream in(&file);
in.setCodec("UTF-8");
while(!in.atEnd())
{
QString line = in.readLine(); //segfault here
...
At first I thought it was new Mac OS sandboxing stupidity limiting my file
acces, but I have have been able to get that line to run fine in a minimal
example (so I'm guessing that's not it, but I'm still not positive). I'm
wondering now if there is some sort of mismatch between xcode/clang
version used to compile Qt5 and the version I'm using to compile my apps
(maybe mine is too new?). Running otool -L on the Qt5 libs and my program
shows they were compiled for different versions of libstdc++
(compatibility version 7.0.0 for both, but current version 52.0.0 for Qt5
and 56.0.0 for my program). Could that cause a segfault in the readLine()
function?
Does anyone one have any other ideas of what I would need to do to get my
programs to run properly under the latest Mountain Lion / XCode and the
standard Qt5 for Mac libs? Basically I'm asking if I'm missing something
obvious in terms of library/compile versions or steps to port an app to
Qt5 under Mac. Other than what I did to port my app to Qt5 under Linux,
all I did was run qmake and xcodebuild to build it on Mac, and I don't
know if there is something else I'm supposed to do.
Another related question. Is Qt5 going forward always going to use clang
for Mac OSX, or should I also expect to see Qt5 prebuilt for gcc on Mac at
some point as well?
Thanks!
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