patch 9.0.1611: v:maxcol can be changed in a :for loop Commit: https://github.com/vim/vim/commit/16d2c02c80e6d4822010816e085cabf91bf91423 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Jun 5 19:46:18 2023 +0100 patch 9.0.1611: v:maxcol can be changed in a :for loop Problem: v:maxcol can be changed in a :for loop. Solution: Check for read-only loop variable. (closes https://github.com/vim/vim/issues/12470)

# 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/