Re: undefined reference to __gnustep_objcxx_personality_v0

[Dmitry Moskalchuk]

On 26/12/15 13:48, David Chisnall wrote:

I think that libobjc2 should now work as well - let me know if it doesn’t.

David,

I've checked out and built libobjc2 for Android. First, I've checked out branch 1.8.1 [1], and applied some (mostly cosmetic) fixes [2] to make it build-able for Android by CrystaX NDK. Mostly it was fixes of compiler warnings, but also I've added back old Makefile, with some fixes, since generating proper Makefile with cmake looks really tricky for Android - cmake just don't understand that host and target systems are different and generate Makefile for host system, even though I've provided proper CC, CFLAGS, LDFLAGS, etc. So right now bringing back old good Makefile looks better for me than fighting with cmake.

So, having libobjc2 built for Android, I've compiled and run simple test [3], just to verify that Objective-C runtime works properly. It works fine on my ARM Android devices.

Then, I've switched to 'master' branch of libobjc2 repository, and applied patch [2] on top of it. It required small additions, which makes no sense to specify here, just because it was trivial, but after that, when libobjc2 was built from 'master' sources, that simple test started crashing on my ARM Android devices. Call stack of crash [4] is bit unclear though. As you can see there, it crashes somewhere inside objc_msgSend_fpret.

As far as I see, there are many commits between 1.8.1 and master. I'm going to find one, causing this crash. However, I thought it might be interesting to you to get feedback on this stage too.


[1] https://github.com/gnustep/libobjc2/tree/1.8.1
[2] https://github.com/crystax/android-vendor-libobjc2/commit/a10757ac479704faac2b2fa32e9b0150b2a8aa8b
[3] https://github.com/crystax/android-platform-ndk/blob/master/tests/device/crystax-test-objc-runtime/jni/test.m
[4] https://gist.github.com/dmcrystax/bb2c7e1c3c79e45c039d

P.S. Please note that this is clear Objective-C code, i.e. no yet Objective-C++ things involved.

--
Dmitry Moskalchuk

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