patch 9.0.1485: no functions for converting from/to UTF-16 index Commit: https://github.com/vim/vim/commit/67672ef097dd708244ff042a8364994da2b91e75 Author: Christian Brabandt <cb@256bit.org> Date: Mon Apr 24 21:09:54 2023 +0100 patch 9.0.1485: no functions for converting from/to UTF-16 index Problem: no functions for converting from/to UTF-16 index. Solution: Add UTF-16 flag to existing funtions and add strutf16len() and utf16idx(). (Yegappan Lakshmanan, closes #12216)

# Clang 12 (or Apple clang 13) and later makes a warning '-Wcompound-token-split-by-macro' enable by default.
/^PERL_CFLAGS_EXTRA[[:blank:]]*=/s/$/ -Wno-error=compound-token-split-by-macro/
/^RUBY_CFLAGS_EXTRA[[:blank:]]*=/s/$/ -Wno-error=compound-token-split-by-macro/