[libc-commits] [llvm] [libc] [libc][NFC] Move float macro into its own header / add target os detection (PR #73311)

[Clement Courbet via libc-commits]

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@@ -43,10 +43,14 @@ We define two kinds of macros:
 
      * ``architectures.h`` - Target architecture properties.
        e.g., ``LIBC_TARGET_ARCH_IS_ARM``.
+     * ``os.h`` - Target os properties.
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legrosbuffle wrote:

You might want to sort these by name so that they are easier to find.

https://github.com/llvm/llvm-project/pull/73311