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When enabling both x86_64 and i386 + x86_64 architecture on "iOS Build" -> Advanced you won't be able to build the app, with this error: ld: symbol dyld_stub_binding_helper not found, normally in crt1.o/dylib1.o/bundle1.o for architecture x86_64
Build log: https://gist.github.com/pa-w/c61daff48b15934db14d
Xamarin Studio: 5.4 (build 215)
Xcode: Version 6.0 (6A313)
How to reproduce:
1. Open any sample from monotouch-samples (unified_api branch)
2. Go to iOS Build -> Advanced on the project's options.
3. Select either x86_64 or i386 + x86_64 as supported architectures
> --targetver "3.0"
Try setting Deployment Target to something higher (I believe 5.1.1 is the minimum for 64-bit apps).
We should issue a MTxxxx error in such cases. The user is asking for something that we (well Apple) can't provide.
@Paola a confirmation would still be nice (in case this hides another issue).
We already emit an MT0047 error code, the version Paola is using just doesn't have it yet.