* c-lex.c (init_c_lex): Canonicalize "-" filename to "".

From-SVN: r47461

gcc/ChangeLog

 2001-11-29  Jakub Jelinek  <jakub@redhat.com>
 
+	* c-lex.c (init_c_lex): Canonicalize "-" filename to "".
+
+2001-11-29  Jakub Jelinek  <jakub@redhat.com>
+
 	* gcc.c (ASM_DEBUG_SPEC): Only check HAVE_AS_G*_DEBUG_FLAG
 	macros for the supported debugging types.
 

gcc/c-lex.c

@@ -142,7 +142,7 @@ init_c_lex (filename)
   /* Start it at 0.  */
   lineno = 0;
 
-  if (filename == NULL)
+  if (filename == NULL || !strcmp (filename, "-"))
     filename = "";
 
   return cpp_read_main_file (parse_in, filename, ident_hash);