cpplib.h (struct cpp_options): Add warn_deprecated field.

        * cpplib.h (struct cpp_options): Add warn_deprecated field.
        * cppinit.c (cpp_create_reader): Turn it on by default.
        * c-opts.c (c_common_decode_option): Set it.
        * cpplib.c (do_pragma_once): Only complain about #pragma once
        if warn_deprecated is set.

From-SVN: r62005

gcc/ChangeLog

+2003-01-28  Jason Merrill  <jason@redhat.com>
+
+	* cpplib.h (struct cpp_options): Add warn_deprecated field.
+	* cppinit.c (cpp_create_reader): Turn it on by default.
+	* c-opts.c (c_common_decode_option): Set it.
+	* cpplib.c (do_pragma_once): Only complain about #pragma once
+	if warn_deprecated is set.
+
 2003-01-28  Dale Johannesen  <dalej@apple.com>
+
         * emit-rtl.c (const_double_htab_hash):  Use mode in the hash.
         * loop.c (scan_loop):  Move movables on -Os rich-register targets.
         * config/rs6000/rs6000.md (sibcall*):  Use match_operand for LR.

gcc/c-opts.c

@@ -767,6 +767,7 @@ c_common_decode_option (argc, argv)
 
     case OPT_Wdeprecated:
       warn_deprecated = on;
+      cpp_opts->warn_deprecated = on;
       break;
 
     case OPT_Wdiv_by_zero:

gcc/cppinit.c

@@ -527,6 +527,7 @@ cpp_create_reader (lang)
   CPP_OPTION (pfile, tabstop) = 8;
   CPP_OPTION (pfile, operator_names) = 1;
   CPP_OPTION (pfile, warn_endif_labels) = 1;
+  CPP_OPTION (pfile, warn_deprecated) = 1;
   CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99);
 
   CPP_OPTION (pfile, pending) =

gcc/cpplib.c

@@ -1223,7 +1223,8 @@ static void
 do_pragma_once (pfile)
      cpp_reader *pfile;
 {
-  cpp_error (pfile, DL_WARNING, "#pragma once is obsolete");
+  if (CPP_OPTION (pfile, warn_deprecated))
+    cpp_error (pfile, DL_WARNING, "#pragma once is obsolete");
 
   if (pfile->buffer->prev == NULL)
     cpp_error (pfile, DL_WARNING, "#pragma once in main file");

gcc/cpplib.h

@@ -278,6 +278,9 @@ struct cpp_options
   /* Nonzero means don't print warning messages.  */
   unsigned char inhibit_warnings;
 
+  /* Nonzero means complain about deprecated features.  */
+  unsigned char warn_deprecated;
+
   /* Nonzero means don't suppress warnings from system headers.  */
   unsigned char warn_system_headers;