llvm-project

907eb11c - [libc] Add getc, ungetc, fflush to enable libc++ iostream on baremetal (#175530)

[libc] Add getc, ungetc, fflush to enable libc++ iostream on baremetal (#175530) After https://github.com/llvm/llvm-project/pull/168931 landed getc, ungetc and fflush are still missing at link time while trying to make libc++ std::cout work with LLVM libc on baremetal. ungetc implementation is very minimal only to cover the current standard streams implementation from the patch above.