[all-commits] [llvm/llvm-project] 85c54a: [Docs] Document freestanding requirements (#132232)

[Aaron Ballman via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 85c54a519fa6856b3e9a462445633ed4535eafa4
      https://github.com/llvm/llvm-project/commit/85c54a519fa6856b3e9a462445633ed4535eafa4
  Author: Aaron Ballman <aaron at aaronballman.com>
  Date:   2025-03-27 (Thu, 27 Mar 2025)

  Changed paths:
    M clang/docs/CommandGuide/clang.rst
    M clang/docs/UsersManual.rst
    M clang/www/c_status.html

  Log Message:
  -----------
  [Docs] Document freestanding requirements (#132232)

This adds some initial documentation about freestanding requirements for
Clang. The most critical part of the documentation is spelling out that
a conforming freestanding C Standard Library is required; Clang will not
be providing the headers for <string.h> in C23 which expose a number of
symbols in freestanding mode.

The docs also make it clear that in addition to a conforming
freestanding C standard library, the library must provide some
additional symbols which LLVM requires.

These docs are not comprehensive, this is just getting the bare bones in
place so that they can be expanded later.

This also updates the C status page to make it clear that we don't have
anything to do for WG14 N2524 which adds string interfaces to
freestanding mode.



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