[libc] Revert https://github.com/llvm/llvm-project/pull/83199 since it broke Fuchsia. (#83374)

With some header fix forward for GPU builds.

[libc] Add "include/" to the LLVM include directories (#83199)

Summary:
Recent changes added an include path in the float128 type that used the
internal `libc` path to find the macro. This doesn't w

[libc] Add "include/" to the LLVM include directories (#83199)

Summary:
Recent changes added an include path in the float128 type that used the
internal `libc` path to find the macro. This doesn't work once it's
installed because we need to search from the root of the install dir.
This patch adds "include/" to the include path so that our inclusion
of installed headers always match the internal use.

show more ...

[libc] Add fixed point support to printf (#82707)

This patch adds the r, R, k, and K conversion specifiers to printf, with
accompanying tests. They are guarded behind the
LIBC_COPT_PRINTF_DISABLE_FI

[libc] Add fixed point support to printf (#82707)

This patch adds the r, R, k, and K conversion specifiers to printf, with
accompanying tests. They are guarded behind the
LIBC_COPT_PRINTF_DISABLE_FIXED_POINT flag as well as automatic fixed
point support detection.

show more ...