--- gcc-2.95.2.orig/gcc/c-lex.c	Sun Mar 21 04:21:23 1999
+++ gcc-2.95.2/gcc/c-lex.c	Wed Sep 26 21:40:05 2001
@@ -1465,6 +1465,11 @@
 		base = 16;
 		*p++ = (c = GETC());
 	      }
+        else if ((c == 'b') || (c == 'B'))
+          {
+        base = 2;
+        *p++ = (c = GETC());
+          }
 	    /* Leading 0 forces octal unless the 0 is the only digit.  */
 	    else if (c >= '0' && c <= '9')
 	      {