patch 8.2.4142: build failure with normal features without persistent undo Commit: https://github.com/vim/vim/commit/b4868eddd9cdc7086c88a7a3699dd435d34ae904 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jan 19 11:24:40 2022 +0000 patch 8.2.4142: build failure with normal features without persistent undo Problem: Build failure with normal features without persistent undo. Solution: Adjust #ifdef. (closes https://github.com/vim/vim/issues/9557)

# 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/