patch 8.2.4856: MinGW compiler complains about unknown escape sequence Commit: https://github.com/vim/vim/commit/2890c0b9d2416489d48bc47567378503997fef84 Author: Christian Brabandt <cb@256bit.org> Date: Mon May 2 10:34:15 2022 +0100 patch 8.2.4856: MinGW compiler complains about unknown escape sequence Problem: MinGW compiler complains about unknown escape sequence. Solution: Avoid using a backslash in path. (Christian Brabandt, closes #10337)

# 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/