what does macosx-version-min imply?

Question

When I pass compiler flag -mmacosx-version-min=10.5, what does it mean? I think it implies the result binary is x86, not ppc, but is it 32 bits or 64 bits? I\'m

Answer 1

From my testing, it's also important that this option be passed to the link step (like -arch); so it does more than affect macros/preprocessing (as might be inferred from other answers).

When passed to compile step but not passed to the link step, I found that shared libraries built with 10.6 would not load under 10.5.