[roll] Roll fuchsia [libc] Use llvm-libc implementations of sqrt(f), fabs(f)

This adds some build machinery for using llvm-libc functions
without including their tests. The math tests are not compatible
with zxtest and also require an external dependency (MPFR) that
won't ever be used in the Fuchsia build.

It also adds build machinery for using llvm-libc CPU-specific
implementation files, though that is not actually used yet.

So far only these two functions in double and float forms are
taken from llvm-libc. That's because on all machines the
llvm-libc implementations of these just use a hardware
instruction, so there's no material difference from the old musl
implementations that use the same instructions.

Original-Bug: 122877
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/825436
Original-Revision: 9b6138f604728506f3cf996358b00169d2c4210b
GitOrigin-RevId: e62a2bdfb2281e284cd12baa940ac01237489134
Change-Id: I0f8809773c6aebfece431b822ae646d8d0bb383f
1 file changed
tree: b39255f02e82b5981ab38cb033b5baa4c92ad010
  1. git-hooks/
  2. infra/
  3. third_party/
  4. cts
  5. firmware
  6. flower
  7. jiri.lock
  8. MILESTONE
  9. minimal
  10. prebuilts
  11. README.md
  12. stem
  13. test_durations
  14. toolchain
README.md

Integration

This repository contains Fuchsia's Global Integration manifest files.

Making changes

All changes should be made to the internal version of this repository. Our infrastructure automatically updates this version when the internal one changes.

Currently all changes must be made by a Google employee. Non-Google employees wishing to make a change can ask for assistance via the IRC channel #fuchsia on Freenode.

Obtaining the source

First install Jiri.

Next run:

$ jiri init
$ jiri import minimal https://fuchsia.googlesource.com/integration
$ jiri update

Third party

Third party projects should have their own subdirectory in ./third_party.