[libcxx-commits] [libcxx] [libc++] Remove explicit mentions of __need_FOO macros (PR #119025)

[Petr Hosek via libcxx-commits]

petrhosek wrote:

> If you want me to investigate, I'm happy to do that but I'll need a clear reproducer.

Our sysroot doesn't contain libgcc since we always use compiler-rt and libunwind, so you need `-DCMAKE_{SHARED,MODULE,EXE}_LINKER_FLAGS="--rtlib=compiler-rt --unwindlib=libunwind"`.

https://github.com/llvm/llvm-project/pull/119025