[libcxx-commits] [libcxx] [libc++][AIX] Define _LARGE_FILES to fix offset_range.pass test on 32-bit AIX (PR #189540)

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Himadhith wrote:

> Would it make more sense to define this in the corresponding libc header so that this works for people without having to define a special macro?

But if the macro is defined inside a libcxx header wouldn't it force 64-bits by default even when that is not what the user would like? 
@jakeegan 

https://github.com/llvm/llvm-project/pull/189540