[Qtwebengine] "can't mmap icudtl.dat" in a Mac OS app

[Becsi Andras]

Hi David,

We override the path through PathService (base::DIR_QT_LIBRARY_DATA) which on a Mac build where QT_MAC_FRAMEWORK_BUILD is defined should be in the framework bundle Resources/.

If the detected DIR_QT_LIBRARY_DATA path ends up being empty for you it means that the bundle with identifier “org.qt-project.Qt.QtWebEngineCore” is not found, which is most likely because src/core/Info_mac.plist has not been deployed together with the bundle, which could be because you did not use Qt’s macdeployqt to copy the framework and deploy your app properly.

You can find more information about this at the change that added plist file for the framework: https://codereview.qt-project.org/#/c/99052/

/Andras


On 21 Feb 2015, at 23:22 , David Cortesi <davecortesi at gmail.com<mailto:davecortesi at gmail.com>> wrote:

Building a Mac OS app that uses QtWebEngine.
When the program starts up it terminates with
 [0221/140053:ERROR:icu_util.cc(154)] Couldn't mmap icudtl.dat

The only place apparently the file can be found is the CWD. If I have a copy of icudtl.dat in the current directory, wherever that may be, then the above error does not appear!

When I put it in Contents/Resources, it is not found -- unless of course, x.app/Contents/Resources is the CWD. Then it is found.

I have attempted to use a qt.conf file to locate the file, setting the ArchData path and the Data path both to "Resources". The app prints out QLibraryInfo values, thus I know that the qt.conf is being found and applied: ArchData and Data paths are both being set to x.app/Contents/Resources.

Where does WebEngineCore (I think) expect to find icudtl.dat, and how can I persuade it to use the Resources folder?

Thanks,
Dave Cortesi
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