[libcxx-commits] [libcxx] [libcxxabi] [libc++][RFC] Always define internal feature test macros (PR #89178)

[Louis Dionne via libcxx-commits]

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@@ -245,7 +245,9 @@ _LIBCPP_HARDENING_MODE_DEBUG
 #    if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
 #      define _LIBCPP_HAS_BITSCAN64
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ldionne wrote:

This one should become a 0-1 macro as well.

https://github.com/llvm/llvm-project/pull/89178