[issue41181] [macOS] Build macOS installer with LTO and PGO optimizations

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

If clang 6.0 is a dead end for LTO, another option is to build a recent clang version on macOS 10.9. If I manage to do that, would it sound like an acceptable solution? I don't expect any API/ABI issue just by changing the clang version. Upgrading clang should not change the semantics.

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