[libc-commits] [libc] [libc] Fix missing sysroot path for kernel headers when crosscompiling (PR #99588)

[Mikhail R. Gadelha via libc-commits]

mikhailramalho wrote:

> So when cross compiling, we should only look at the sysroot, and not /usr/include, right?

IIUC, we need to add the `$sysroot/usr/include` explicitly because we add `-nostdlibinc` by default.

https://github.com/llvm/llvm-project/pull/99588