patch 8.2.2442: automatic GUI selection does not check for GTK 3 Commit: https://github.com/vim/vim/commit/f272ae12ac064856b710046393d5bf9b1670076d Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jan 31 19:52:50 2021 +0100 patch 8.2.2442: automatic GUI selection does not check for GTK 3 Problem: Automatic GUI selection does not check for GTK 3. Solution: Make SKIP_GTK3 empty for automatic GUI support. Set SKIP_GTK3 to YES when checking for GTK2.

/^CFLAGS[[:blank:]]*=/s/$/ -Wno-error=missing-field-initializers/
/^RUBY_CFLAGS[[:blank:]]*=/s/$/ -Wno-error=unknown-attributes -Wno-error=ignored-attributes/