Try "so" attribute if "smso" is not found

tool/lib/colorize.rb

@@ -8,7 +8,7 @@ class Colorize
     @colors = @reset = nil
     @color = (opts[:color] if opts)
     if color or (color == nil && STDOUT.tty?)
-      if (/\A\e\[.*m\z/ =~ IO.popen("tput smso", "r", :err => IO::NULL, &:read) rescue nil)
+      if (%w[smso so].any? {|attr| /\A\e\[.*m\z/ =~ IO.popen("tput #{attr}", "r", :err => IO::NULL, &:read)} rescue nil)
         @beg = "\e["
         colors = (colors = ENV['TEST_COLORS']) ? Hash[colors.scan(/(\w+)=([^:\n]*)/)] : {}
         if opts and colors_file = opts[:colors_file]

tool/m4/_colorize_result_prepare.m4

@@ -9,6 +9,7 @@ AC_DEFUN([_COLORIZE_RESULT_PREPARE], [
                        [configure_tty=0])])
     AS_IF([test $configure_tty -eq 1], [
 	msg_begin="`tput smso 2>/dev/null`"
+	AS_IF([test -z "$msg_begin"], [msg_begin="`tput so 2>/dev/null`"])
 	AS_CASE(["$msg_begin"], ['@<:@'*m],
 	    [msg_begin="`echo "$msg_begin" | sed ['s/[0-9]*m$//']`"
 	    msg_checking="${msg_begin}33m"