Bitcode for iOS ?

k.gaitanis · wrote on 19 Mar 2016, 09:38

I have an app for iOS distributed via the AppStore. I would like to benefit from the advantages of including bitcode in my bundle. Is that possible ? Currently when I try to compile my app with Xcode and bitcode enabled I get the following error :

ld: -u and -bitcode_bundle (Xcode setting ENABLE_BITCODE=YES) cannot be used together

Is this Qt related or am I doing something wrong?

SGaist · 20 Mar 2016, 13:38

Hi,

What version of Qt are you using ?

k.gaitanis · S SGaist 19 Mar 2016, 21:22

@SGaist Qt 5.6 installed using the online installer

SGaist · wrote on 20 Mar 2016, 22:18

From what I found, currently bitcode is disabled to support deployment target under iOS 6.0

k.gaitanis · wrote on 20 Mar 2016, 22:54

And if we only want to support iOS 8.1 and higher? Would it be possible to enable it?

SGaist · wrote on 21 Mar 2016, 22:10

You'll have to modify and recompile qmake for that.

k.gaitanis · wrote on 22 Mar 2016, 17:17

Modify what in qmake?

SGaist · wrote on 22 Mar 2016, 20:58

Take a look at pbuilder_pbx.cpp around line 1409

k.gaitanis · wrote on 22 Mar 2016, 21:31

Found this at line 1425 of qtbase-5.6.0/qmake/generators/mac/pbuilder_pbx.cpp:

        // Bitcode is only supported with a deployment target >= iOS 6.0.
        // Disable it for now, and consider switching it on when later
        // bumping the deployment target.
        settings.insert("ENABLE_BITCODE", "NO");
        settings.insert("GCC_GENERATE_DEBUGGING_SYMBOLS", as_release ? "NO" : "YES");

This seems like it would solve my problem. It also seems to answer to my other post concerning DSym files (iOS: DSym not uploaded to the AppStore).

I don't have time to test right now, but I'll definitively give it a try soon and report back.

Thanks SGaist