Add commentary.

From-SVN: r67606

diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c
index 3679f869d04b33c85ce820de53888cb4a4ef4430..b17b469955bc20d079d9b813447e4d217aa50f3e 100644 (file)
--- a/gcc/c-cppbuiltin.c
+++ b/gcc/c-cppbuiltin.c
@@ -310,6 +310,8 @@ c_cpp_builtins (pfile)
       if (warn_deprecated)
        cpp_define (pfile, "__DEPRECATED");
     }
+  /* Note that we define this for C as well, so that we know if
+     __attribute__((cleanup)) will interface with EH.  */
   if (flag_exceptions)
     cpp_define (pfile, "__EXCEPTIONS");