(longopts): New undocumented option --no-duplicates.

(no_duplicates): Static variables for the above option.
(print_help): Do not print help for --no-warn, now undocumented.
(add_node): Allow duplicate tags in ctags mode unless --no-duplicates.

2 files changed, 46 insertions, 33 deletions

diff --git a/lib-src/ChangeLog b/lib-src/ChangeLog
index 76a0dcf1b9e..ebf6f27a610 100644
--- a/lib-src/ChangeLog
+++ b/lib-src/ChangeLog
@@ -1,3 +1,10 @@
+2007-01-02  Francesco Potort,Al(B  <pot@gnu.org>
+
+	* etags.c: (longopts): New undocumented option --no-duplicates.
+	(no_duplicates): Static variables for the above option.
+	(print_help): Do not print help for --no-warn, now undocumented.
+	(add_node): Allow duplicate tags in ctags mode unless --no-duplicates.
+
 2006-12-28  Francesco Potort,Al(B  <pot@gnu.org>
 
 	* etags.c (readline): When creating a relative file name from a
diff --git a/lib-src/etags.c b/lib-src/etags.c
index c4f7fdc4d69..bab09d77bac 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -41,7 +41,7 @@
  * configuration file containing regexp definitions for etags.
  */
 
-char pot_etags_version[] = "@(#) pot revision number is 17.25";
+char pot_etags_version[] = "@(#) pot revision number is 17.26";
 
 #define	TRUE	1
 #define	FALSE	0
@@ -456,9 +456,10 @@ static bool globals;		/* create tags for global variables */
 static bool declarations;	/* --declarations: tag them and extern in C&Co*/
 static bool members;		/* create tags for C member variables */
 static bool no_line_directive;	/* ignore #line directives (undocumented) */
+static bool no_duplicates;	/* no duplicate tags for ctags (undocumented) */
 static bool update;		/* -u: update tags */
 static bool vgrind_style;	/* -v: create vgrind style index output */
-static bool no_warnings;	/* -w: suppress warnings */
+static bool no_warnings;	/* -w: suppress warnings (undocumented) */
 static bool cxref_style;	/* -x: create cxref style output */
 static bool cplusplus;		/* .[hc] means C++, not C */
 static bool ignoreindent;	/* -I: ignore indentation in C */
@@ -477,39 +478,40 @@ static bool need_filebuf;	/* some regexes are multi-line */
 
 static struct option longopts[] =
 {
-  { "append",		  no_argument,	     NULL,	     	 'a'   },
-  { "packages-only",      no_argument,	     &packages_only, 	 TRUE  },
-  { "c++",		  no_argument,	     NULL,	     	 'C'   },
-  { "declarations",	  no_argument,	     &declarations,  	 TRUE  },
-  { "no-line-directive",  no_argument,	     &no_line_directive, TRUE  },
-  { "help",		  no_argument,	     NULL,     	     	 'h'   },
-  { "help",		  no_argument,	     NULL,     	     	 'H'   },
-  { "ignore-indentation", no_argument,	     NULL,     	     	 'I'   },
-  { "language",           required_argument, NULL,     	     	 'l'   },
-  { "members",		  no_argument,	     &members, 	     	 TRUE  },
-  { "no-members",	  no_argument,	     &members, 	     	 FALSE },
-  { "output",		  required_argument, NULL,	     	 'o'   },
-  { "regex",		  required_argument, NULL,	     	 'r'   },
-  { "no-regex",		  no_argument,	     NULL,	     	 'R'   },
-  { "ignore-case-regex",  required_argument, NULL,	     	 'c'   },
+  { "append",             no_argument,       NULL,               'a'   },
+  { "packages-only",      no_argument,       &packages_only,     TRUE  },
+  { "c++",                no_argument,       NULL,               'C'   },
+  { "declarations",       no_argument,       &declarations,      TRUE  },
+  { "no-line-directive",  no_argument,       &no_line_directive, TRUE  },
+  { "no-duplicates",      no_argument,       &no_duplicates,     TRUE  },
+  { "help",               no_argument,       NULL,               'h'   },
+  { "help",               no_argument,       NULL,               'H'   },
+  { "ignore-indentation", no_argument,       NULL,               'I'   },
+  { "language",           required_argument, NULL,               'l'   },
+  { "members",            no_argument,       &members,           TRUE  },
+  { "no-members",         no_argument,       &members,           FALSE },
+  { "output",             required_argument, NULL,               'o'   },
+  { "regex",              required_argument, NULL,               'r'   },
+  { "no-regex",           no_argument,       NULL,               'R'   },
+  { "ignore-case-regex",  required_argument, NULL,               'c'   },
   { "parse-stdin",        required_argument, NULL,               STDIN },
-  { "version",		  no_argument,	     NULL,     	     	 'V'   },
+  { "version",            no_argument,       NULL,               'V'   },
 
 #if CTAGS /* Ctags options */
-  { "backward-search",	  no_argument,	     NULL,	     	 'B'   },
-  { "cxref",		  no_argument,	     NULL,	     	 'x'   },
-  { "defines",		  no_argument,	     NULL,	     	 'd'   },
-  { "globals",		  no_argument,	     &globals, 	     	 TRUE  },
-  { "typedefs",		  no_argument,	     NULL,	     	 't'   },
-  { "typedefs-and-c++",	  no_argument,	     NULL,     	     	 'T'   },
-  { "update",		  no_argument,	     NULL,     	     	 'u'   },
-  { "vgrind",		  no_argument,	     NULL,     	     	 'v'   },
-  { "no-warn",		  no_argument,	     NULL,	     	 'w'   },
+  { "backward-search",    no_argument,       NULL,               'B'   },
+  { "cxref",              no_argument,       NULL,               'x'   },
+  { "defines",            no_argument,       NULL,               'd'   },
+  { "globals",            no_argument,       &globals,           TRUE  },
+  { "typedefs",           no_argument,       NULL,               't'   },
+  { "typedefs-and-c++",   no_argument,       NULL,               'T'   },
+  { "update",             no_argument,       NULL,               'u'   },
+  { "vgrind",             no_argument,       NULL,               'v'   },
+  { "no-warn",            no_argument,       NULL,               'w'   },
 
 #else /* Etags options */
-  { "no-defines",	  no_argument,	     NULL,	     	 'D'   },
-  { "no-globals",	  no_argument,	     &globals, 	     	 FALSE },
-  { "include",		  required_argument, NULL,     	     	 'i'   },
+  { "no-defines",         no_argument,       NULL,               'D'   },
+  { "no-globals",         no_argument,       &globals,           FALSE },
+  { "include",            required_argument, NULL,               'i'   },
 #endif
   { NULL }
 };
@@ -976,9 +978,13 @@ Relative ones are stored relative to the output file's directory.\n");
         Print on the standard output an index of items intended for\n\
         human consumption, similar to the output of vgrind.  The index\n\
         is sorted, and gives the page number of each item.");
+# if PRINT_UNDOCUMENTED_OPTIONS_HELP
+      puts ("-w, --no-duplicates\n\
+        Do not create duplicate tag entries, for compatibility with\n\
+	traditional ctags.");
       puts ("-w, --no-warn\n\
-        Suppress warning messages about entries defined in multiple\n\
-        files.");
+        Suppress warning messages about duplicate tag entries.");
+# endif /* PRINT_UNDOCUMENTED_OPTIONS_HELP */
       puts ("-x, --cxref\n\
         Like --vgrind, but in the style of cxref, rather than vgrind.\n\
         The output uses line numbers instead of page numbers, but\n\
@@ -2168,7 +2174,7 @@ add_node (np, cur_node_p)
        * If this tag name matches an existing one, then
        * do not add the node, but maybe print a warning.
        */
-      if (!dif)
+      if (no_duplicates && !dif)
 	{
 	  if (np->fdp == cur_node->fdp)
 	    {