* ld.texinfo: Document --fatal-warnings.

* ld.1: Regenerate.

* ldmisc.c (vfinfo): Set flag to inhibit making executable if
warnings have been turned into errors.
* lexsup.c (OPTION_WARN_FATAL): Define.
(ld_options): Entry for --fatal-warnings.
(parse_args): Handle OPTION_WARN_FATAL.
* ld.h (ld_config_type): Add fatal_warnings field.

ld/ldmisc.c

@@ -399,6 +399,9 @@ vfinfo (fp, fmt, arg)
 	}
     }
 
+  if (config.fatal_warnings)
+    config.make_executable = false;
+
   if (fatal == true)
     xexit (1);
 }