gdb: rename ldirname to gdb_ldirname

It conflicts with the ldirname function that will be added in the next
libiberty sync.

gdb/corelow.c

@@ -957,7 +957,7 @@ locate_exec_from_corefile_exec_context (bfd *cbfd,
     execbfd = open_and_check_build_id (exec_name);
   else
     {
-      std::string p = (ldirname (bfd_get_filename (cbfd))
+      std::string p = (gdb_ldirname (bfd_get_filename (cbfd))
 		       + '/'
 		       + exec_name);
       execbfd = open_and_check_build_id (p.c_str ());
@@ -971,7 +971,7 @@ locate_exec_from_corefile_exec_context (bfd *cbfd,
   if (execbfd == nullptr)
     {
       const char *base_name = lbasename (exec_name);
-      std::string p = (ldirname (bfd_get_filename (cbfd))
+      std::string p = (gdb_ldirname (bfd_get_filename (cbfd))
 		       + '/'
 		       + base_name);
       execbfd = open_and_check_build_id (p.c_str ());

gdb/darwin-nat.c

@@ -1853,7 +1853,7 @@ copy_shell_to_cache (const char *shell, const std::string &new_name)
     error (_("Could not open shell (%s) for reading: %s"),
 	   shell, safe_strerror (errno));
 
-  std::string new_dir = ldirname (new_name.c_str ());
+  std::string new_dir = gdb_ldirname (new_name.c_str ());
   if (!mkdir_recursive (new_dir.c_str ()))
     error (_("Could not make cache directory \"%s\": %s"),
 	   new_dir.c_str (), safe_strerror (errno));

gdb/dwarf2/dwz.c

@@ -343,7 +343,7 @@ dwz_file::read_dwz_file (dwarf2_per_objfile *per_objfile)
     {
       gdb::unique_xmalloc_ptr<char> abs = gdb_realpath (per_bfd->filename ());
 
-      filename = ldirname (abs.get ()) + SLASH_STRING + filename;
+      filename = gdb_ldirname (abs.get ()) + SLASH_STRING + filename;
     }
 
   /* First try the file name given in the section.  If that doesn't

gdb/dwarf2/read.c

@@ -5859,7 +5859,7 @@ find_file_and_directory (struct die_info *die, struct dwarf2_cu *cu)
       && res.get_name () != nullptr
       && IS_ABSOLUTE_PATH (res.get_name ()))
     {
-      res.set_comp_dir (ldirname (res.get_name ()));
+      res.set_comp_dir (gdb_ldirname (res.get_name ()));
       res.set_name (make_unique_xstrdup (lbasename (res.get_name ())));
     }
 
@@ -7434,7 +7434,7 @@ try_open_dwop_file (dwarf2_per_bfd *per_bfd, const char *file_name, int is_dwp,
     search_path = per_bfd->captured_debug_dir.c_str ();
 
   /* Add the path for the executable binary to the list of search paths.  */
-  std::string objfile_dir = ldirname (per_bfd->filename ());
+  std::string objfile_dir = gdb_ldirname (per_bfd->filename ());
   search_path_holder.reset (concat (objfile_dir.c_str (),
 				    dirname_separator_string,
 				    search_path, nullptr));
@@ -7807,7 +7807,7 @@ open_and_init_dwp_file (dwarf2_per_objfile *per_objfile)
       struct objfile *backlink = objfile->separate_debug_objfile_backlink;
       const char *backlink_basename = lbasename (backlink->original_name);
 
-      dwp_name = ldirname (objfile->original_name) + SLASH_STRING + backlink_basename;
+      dwp_name = gdb_ldirname (objfile->original_name) + SLASH_STRING + backlink_basename;
     }
   else
     dwp_name = objfile->original_name;

gdb/python/python.c

@@ -2446,7 +2446,7 @@ py_initialize ()
      /foo/lib/pythonX.Y/...
      This must be done before calling Py_Initialize.  */
   gdb::unique_xmalloc_ptr<char> progname
-    (concat (ldirname (python_libdir.c_str ()).c_str (), SLASH_STRING, "bin",
+    (concat (gdb_ldirname (python_libdir.c_str ()).c_str (), SLASH_STRING, "bin",
 	      SLASH_STRING, "python", (char *) NULL));
 
   {

gdb/symtab.c

@@ -4492,7 +4492,7 @@ info_sources_filter::matches (const char *fullname) const
       switch (m_match_type)
 	{
 	case match_on::DIRNAME:
-	  dirname = ldirname (fullname);
+	  dirname = gdb_ldirname (fullname);
 	  to_match = dirname.c_str ();
 	  break;
 	case match_on::BASENAME:

gdb/utils.c

@@ -3333,7 +3333,7 @@ gdb_argv_as_array_view_test ()
    argument.  */
 
 std::string
-ldirname (const char *filename)
+gdb_ldirname (const char *filename)
 {
   std::string dirname;
   const char *base = lbasename (filename);

gdb/utils.h

@@ -133,7 +133,7 @@ private:
 extern int gdb_filename_fnmatch (const char *pattern, const char *string,
 				 int flags);
 
-std::string ldirname (const char *filename);
+std::string gdb_ldirname (const char *filename);
 
 extern int count_path_elements (const char *path);
 

gdb/xml-syscall.c

@@ -319,7 +319,7 @@ xml_init_syscalls_info (const char *filename)
   if (!full_file)
     return NULL;
 
-  const std::string dirname = ldirname (filename);
+  const std::string dirname = gdb_ldirname (filename);
   auto fetch_another = [&dirname] (const char *name)
     {
       return xml_fetch_content_from_file (name, dirname.c_str ());

gdb/xml-tdesc.c

@@ -670,7 +670,7 @@ file_read_description_xml (const char *filename)
       return NULL;
     }
 
-  const std::string dirname = ldirname (filename);
+  const std::string dirname = gdb_ldirname (filename);
   auto fetch_another = [&dirname] (const char *name)
     {
       return xml_fetch_content_from_file (name, dirname.c_str ());