RUBY_LIB_VERSION_STYLE   29 version.h      #if !defined RUBY_LIB_VERSION && defined RUBY_LIB_VERSION_STYLE
RUBY_LIB_VERSION_STYLE   30 version.h      # if RUBY_LIB_VERSION_STYLE == 3
RUBY_LIB_VERSION_STYLE   32 version.h      # elif RUBY_LIB_VERSION_STYLE == 2