optc-gen.awk: Warn if an option flag has multiple different help strings.

gcc/
	* optc-gen.awk: Warn if an option flag has multiple different
	help strings.

From-SVN: r145278

gcc/ChangeLog

+2009-03-30  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	* optc-gen.awk: Warn if an option flag has multiple different
+	help strings.
+
 2009-03-30  Sebastian Pop  <sebastian.pop@amd.com>
 
 	* doc/invoke.texi (-floop-interchange, -floop-strip-mine,

gcc/optc-gen.awk

@@ -149,6 +149,10 @@ for (i = 0; i < n_opts; i++) {
 		flags[i + 1] = flags[i] " " flags[i + 1];
 		if (help[i + 1] == "")
 			help[i + 1] = help[i]
+		else if (help[i] != "" && help[i + 1] != help[i])
+			print "warning: multiple different help strings for " \
+				opts[i] ":\n\t" help[i] "\n\t" help[i + 1] \
+				| "cat 1>&2"
 		i++;
 		back_chain[i] = "N_OPTS";
 		indices[opts[i]] = j;