Hi David,

> On 18 Jun 2019, at 17:34, David Chisnall <[email protected]> wrote:
> 
>> I wonder why I haven’t found that. Thanks!
>>          struct objc_method_description methodDesc = 
>> protocol_getMethodDescription(_protocol, aSelector, YES, YES);
>>          types = methodDesc.types;
>>  This works great as long as I build with -m32. But as soon as I switch to
> 
> This function is in the Apple headers, so the only explanation I can think of 
> is that you're failing to #include <objc/runtime.h> in the 64-bit case.  You 
> may be implicitly including it via some other header that has a conditional 
> include based on pointer size?

Bumahh! :-( That was it!

Thanks so much! Works now!

Andreas

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