> On Dec 19, 2016, at 4:10 AM, Ben Lau <xben...@gmail.com> wrote: > > Hi, > > I am tracking a crash problem in Qt library on Mac. First of all, I build a > Qt 5.7.1 library from git with : > > $ ./configure -confirm-license -developer-build -opensource -nomake examples > -nomake tests > > Then build an example program via the the qmake built > > $ qmake CONFIG+=debug > > Run it via lldb > > $ lldb ./lodashdemo.app/Contents/MacOS/lodashdemo > > $ run > > (then crash)$ image list > > ... > > [ 7] D6239705-2373-32D9-A1E9-E290DBA7CBAD 0x0000000101081000 > /Users/benlau/tmp/qt5/qt5/qtbase/lib/QtQml.framework/Versions/5/QtQml > > .... > > The QtQml is a shared library without debug symbol. The library that hold > debug symbol should be QtQml_debug located in the same folder > > $ file /Users/benlau/tmp/qt5/qt5/qtbase/lib/QtQml.framework/Versions/5/QtQml* > > /Users/benlau/tmp/qt5/qt5/qtbase/lib/QtQml.framework/Versions/5/QtQml: > Mach-O 64-bit dynamically linked shared library x86_64 > /Users/benlau/tmp/qt5/qt5/qtbase/lib/QtQml.framework/Versions/5/QtQml_debug: > Mach-O 64-bit dynamically linked shared library x86_64 > > My questions are : > > 1) can I turn qmake to link the QtQml_debug ? > or > > 2) can I build a QtQml library with debug symbol?
The “macOS” way to handle frameworks and debug builds, is that the application links against the non-_debug libraries, and if you want to make it load the debug symbols you set DYLD_IMAGE_SUFFIX=_debug before running the application. http://doc.qt.io/qt-5/debug.html#debugging-in-macos-and-xcode Note that applications in /usr/bin (like /usr/bin/lldb) have an additional safe-guard that they reset the DYLD_* variables, so you need to set it in lldb for the application process: $ lldb <your app> $ settings set target.env-vars DYLD_IMAGE_SUFFIX=_debug $ run Br, -- Eike Ziller Principal Software Engineer The Qt Company GmbH Rudower Chaussee 13 D-12489 Berlin eike.zil...@qt.io http://qt.io Geschäftsführer: Mika Pälsi, Juha Varelius, Tuula Haataja Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, HRB 144331 B _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
