Bug in g++ --syntax-only

[Phil Edwards]

On Tue, Jan 16, 2001 at 09:24:36AM +0000, Jason Merrill wrote:
> >>>>> "Richard" == Richard Henderson <rth@redhat.com> writes:
> 
> > On Tue, Jan 16, 2001 at 12:24:59AM -0500, Phil Edwards wrote:
> >> > I think addition of those -l flags should be disabled when
> >> > --syntax-only is given.  I find these messages counterintuitive.
> >> 
> >> Same here.  Somebody comment on the below patch?
> 
> > Ok.
> 
> No, not OK.  Please fix this in g++spec.c instead (search for 'warning').


Something like this?  (What's the diference?)


Index: gcc.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/gcc.c,v
retrieving revision 1.200
diff -c -3 -p -r1.200 gcc.c
*** gcc.c	2001/01/16 06:06:29	1.200
--- gcc.c	2001/01/16 10:09:42
*************** static char dir_separator_str[] = { DIR_
*** 96,104 ****
  
  #define MIN_FATAL_STATUS 1
  
- /* If nonzero, -fsyntax-only was passed. */
- static int flag_syntax_only;
- 
  /* Flag saying to pass the greatest exit code returned by a sub-process
     to the calling program.  */
  static int pass_exit_codes;
--- 96,101 ----
*************** process_command (argc, argv)
*** 3158,3168 ****
  	  printf ("%s\n", spec_machine);
  	  exit (0);
  	}
-       else if (strcmp (argv[i], "-fsyntax-only") == 0)
- 	{
- 	  /* remember this so we don't complain about libraries */
- 	  flag_syntax_only = 1;
- 	}
        else if (strcmp (argv[i], "-fhelp") == 0)
  	{
  	  /* translate_options () has turned --help into -fhelp.  */
--- 3155,3160 ----
*************** process_command (argc, argv)
*** 3789,3795 ****
  	  switches[n_switches].ordering = 0;
  	  /* These are always valid, since gcc.c itself understands it.  */
  	  if (!strcmp (p, "save-temps")
- 	      || !strcmp (p, "fsyntax-only")
  	      || !strcmp (p, "static-libgcc")
  	      || !strcmp (p, "shared-libgcc"))
  	    switches[n_switches].validated = 1;
--- 3781,3786 ----
*************** main (argc, argv)
*** 5858,5864 ****
    /* If options said don't run linker,
       complain about input files to be given to the linker.  */
  
!   if (! linker_was_run && error_count == 0 && flag_syntax_only == 0)
      for (i = 0; (int) i < n_infiles; i++)
        if (explicit_link_files[i])
  	error ("%s: linker input file unused because linking not done",
--- 5849,5855 ----
    /* If options said don't run linker,
       complain about input files to be given to the linker.  */
  
!   if (! linker_was_run && error_count == 0)
      for (i = 0; (int) i < n_infiles; i++)
        if (explicit_link_files[i])
  	error ("%s: linker input file unused because linking not done",
Index: cp/g++spec.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/cp/g++spec.c,v
retrieving revision 1.21
diff -c -3 -p -r1.21 g++spec.c
*** g++spec.c	2000/08/02 20:21:26	1.21
--- g++spec.c	2001/01/16 10:09:42
*************** lang_specific_driver (in_argc, in_argv, 
*** 156,162 ****
  	    quote = argv[i];
  	  else if (library != 0 && ((argv[i][2] == '\0'
  		     && (char *) strchr ("cSEM", argv[i][1]) != NULL)
! 		    || strcmp (argv[i], "-MM") == 0))
  	    {
  	      /* Don't specify libraries if we won't link, since that would
  		 cause a warning.  */
--- 156,163 ----
  	    quote = argv[i];
  	  else if (library != 0 && ((argv[i][2] == '\0'
  		     && (char *) strchr ("cSEM", argv[i][1]) != NULL)
! 		    || strcmp (argv[i], "-MM") == 0
! 		    || strcmp (argv[i], "-fsyntax-only") == 0))
  	    {
  	      /* Don't specify libraries if we won't link, since that would
  		 cause a warning.  */