comment-finding hack for hppa-linux.

gas/ChangeLog

@@ -1,3 +1,15 @@
+2000-07-28  Alan Modra  <alan@linuxcare.com.au>
+
+	* as.h (warn_comment, found_comment, found_comment_file): Declare.
+	* app.c (do_scrub_chars): Record where first comment found.
+	* read.c (read_a_source_file): Init found_comment on entry, and
+	notify whether comments found on exit.
+	* config/tc-hppa.c (md_shortopts): Add "c".
+	(md_longopts): Add warn-comment.
+	(md_parse_option): Handle it.
+	(md_show_usage): Show available options.
+	* config/tc-hppa.h (WARN_COMMENTS): Define if TE_LINUX
+
 Thu Jul 27 11:25:01 2000  Andrew Cagney  <cagney@b1.cygnus.com>
 
 	* config/tc-mn10300.c (md_convert_frag): Fix printfs.

gas/app.c

@@ -1170,6 +1170,10 @@ do_scrub_chars (get, tostart, tolen)
 	     as default if so.  This is a hack.  */
 	  if ((symver_state != NULL) && (*symver_state == 0))
 	    goto de_fault;
+#endif
+#ifdef WARN_COMMENTS
+	  if (!found_comment)
+	    as_where (&found_comment_file, &found_comment);
 #endif
 	  do
 	    {

gas/as.h

@@ -640,6 +640,12 @@ COMMON int flag_m68k_mri;
 #define flag_m68k_mri 0
 #endif
 
+#ifdef WARN_COMMENTS
+COMMON int warn_comment;
+COMMON unsigned int found_comment;
+COMMON char *found_comment_file;
+#endif
+
 #ifndef NUMBERS_WITH_SUFFIX
 #define NUMBERS_WITH_SUFFIX 0
 #endif

gas/config/tc-hppa.c

@@ -4345,12 +4345,23 @@ md_estimate_size_before_relax (fragP, segment)
 }
 
 #ifdef OBJ_ELF
+# ifdef WARN_COMMENTS
+const char *md_shortopts = "Vc";
+# else
 const char *md_shortopts = "V";
+# endif
 #else
+# ifdef WARN_COMMENTS
+const char *md_shortopts = "c";
+# else
 const char *md_shortopts = "";
+# endif
 #endif
 
 struct option md_longopts[] = {
+#ifdef WARN_COMMENTS
+  {"warn-comment", no_argument, NULL, 'c'},
+#endif
   {NULL, no_argument, NULL, 0}
 };
 size_t md_longopts_size = sizeof(md_longopts);
@@ -4369,6 +4380,11 @@ md_parse_option (c, arg)
     case 'V':
       print_version_id ();
       break;
+#endif
+#ifdef WARN_COMMENTS
+    case 'c':
+      warn_comment = 1;
+      break;
 #endif
     }
 
@@ -4379,6 +4395,14 @@ void
 md_show_usage (stream)
      FILE *stream ATTRIBUTE_UNUSED;
 {
+#ifdef OBJ_ELF
+  fprintf (stream, _("\
+  -Q                      ignored\n"));
+#endif
+#ifdef WARN_COMMENTS
+  fprintf (stream, _("\
+  -c                      print a warning if a comment is found\n"));
+#endif
 }
 
 /* We have no need to default values of symbols.  */

gas/config/tc-hppa.h

@@ -61,6 +61,15 @@
 #define TARGET_FORMAT "som"
 #endif
 
+#ifdef TE_LINUX
+/* Define to compile in an extra assembler option, -c, which enables a
+   warning (once per file) when a comment is encountered.
+   The hppa comment char is a `;' which tends to occur in random C asm
+   statements.  A semicolon is a line separator for most assemblers.
+   It's hard to find these lurking semicolons.  Thus...  */
+#define WARN_COMMENTS 1
+#endif
+
 /* FIXME.  Why oh why aren't these defined somewhere globally?  */
 #ifndef FALSE
 #define FALSE   (0)

gas/read.c

@@ -521,6 +521,10 @@ read_a_source_file (name)
   register int temp;
   pseudo_typeS *pop;
 
+#ifdef WARN_COMMENTS
+  found_comment = 0;
+#endif
+
   buffer = input_scrub_new_file (name);
 
   listing_file (name);
@@ -1082,6 +1086,13 @@ read_a_source_file (name)
 #endif
   /* Close the input file.  */
   input_scrub_close ();
+#ifdef WARN_COMMENTS
+  {
+    if (warn_comment && found_comment)
+      as_warn_where (found_comment_file, found_comment,
+		     "first comment found here");
+  }
+#endif
 }
 
 /* For most MRI pseudo-ops, the line actually ends at the first