This no longer builds due to objc_msgSend requiring casting

[ryao]

https://www.mikeash.com/pyblog/objc_msgsends-new-prototype.html

That offers some explanation. This is succinct because I do not have an answer on how to fix this. A local hack crashed on me in the iPhone emulator.

[stianhoiland]

Quick and dirty:

static id (*old_msgSend)(id, SEL, ...) = (void *)objc_msgSend;
#define objc_msgSend old_msgSend