On 19 December 2016 at 16:07, Eike Ziller <eike.zil...@qt.io> wrote: > > > 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, >
Hi Eike, It works. Thank you!
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