opts-global.cc: document last change

gcc/ChangeLog:

	* opts-global.cc (write_langs): Add comment.

diff --git a/gcc/opts-global.cc b/gcc/opts-global.cc
index 4f5f8cd..4355e26 100644 (file)
--- a/gcc/opts-global.cc
+++ b/gcc/opts-global.cc
@@ -61,6 +61,8 @@ write_langs (unsigned int mask)
     if (mask & (1U << n))
       len += strlen (lang_name) + 1;
 
+  /* Allocate at least one character as we'll terminate the string
+     at the very end of this function.  */
   result = XNEWVEC (char, MAX (1, len));
   len = 0;
   for (n = 0; (lang_name = lang_names[n]) != 0; n++)