Fix macOS/GNUstep compilation warnings

* src/nsfns.m (handlePanelKeys): Unused function.
* src/nsterm.m (ns_set_appearance):
([EmacsView initFrameFromEmacs:]): Use EmacsWindow type instead of
NSWindow.
(ns_clip_to_row): Unused function.
(ns_dumpglyphs_stretch): Remove unused variable.
(ns_term_init):
([EmacsWindow setAppearance]): Only compile on macOS.
(ns_mouse_position): Make sure f is initialised on GNUstep.
* src/emacs.c (main): Move allocation of autorelease pool to before
first use.

src/emacs.c

@@ -1243,6 +1243,7 @@ main (int argc, char **argv)
   if (! (lc_all && strcmp (lc_all, "C") == 0))
     {
       #ifdef HAVE_NS
+        ns_pool = ns_alloc_autorelease_pool ();
         ns_init_locale ();
       #endif
       setlocale (LC_ALL, "");
@@ -1612,8 +1613,6 @@ Using an Emacs configured with --with-x-toolkit=lucid does not have this problem
 #endif
 
 #ifdef HAVE_NS
-  ns_pool = ns_alloc_autorelease_pool ();
-
   if (!noninteractive)
     {
 #ifdef NS_IMPL_COCOA

src/nsfns.m

@@ -3012,80 +3012,6 @@ DEFUN ("ns-show-character-palette",
 
    ========================================================================== */
 
-/*
-  Handle arrow/function/control keys and copy/paste/cut in file dialogs.
-  Return YES if handled, NO if not.
- */
-static BOOL
-handlePanelKeys (NSSavePanel *panel, NSEvent *theEvent)
-{
-  NSString *s;
-  int i;
-  BOOL ret = NO;
-
-  if ([theEvent type] != NSEventTypeKeyDown) return NO;
-  s = [theEvent characters];
-
-  for (i = 0; i < [s length]; ++i)
-    {
-      int ch = (int) [s characterAtIndex: i];
-      switch (ch)
-        {
-        case NSHomeFunctionKey:
-        case NSDownArrowFunctionKey:
-        case NSUpArrowFunctionKey:
-        case NSLeftArrowFunctionKey:
-        case NSRightArrowFunctionKey:
-        case NSPageUpFunctionKey:
-        case NSPageDownFunctionKey:
-        case NSEndFunctionKey:
-          /* Don't send command modified keys, as those are handled in the
-             performKeyEquivalent method of the super class.  */
-          if (! ([theEvent modifierFlags] & NSEventModifierFlagCommand))
-            {
-              [panel sendEvent: theEvent];
-              ret = YES;
-            }
-          break;
-          /* As we don't have the standard key commands for
-             copy/paste/cut/select-all in our edit menu, we must handle
-             them here.  TODO: handle Emacs key bindings for copy/cut/select-all
-             here, paste works, because we have that in our Edit menu.
-             I.e. refactor out code in nsterm.m, keyDown: to figure out the
-             correct modifier.  */
-        case 'x': // Cut
-        case 'c': // Copy
-        case 'v': // Paste
-        case 'a': // Select all
-          if ([theEvent modifierFlags] & NSEventModifierFlagCommand)
-            {
-              [NSApp sendAction:
-                       (ch == 'x'
-                        ? @selector(cut:)
-                        : (ch == 'c'
-                           ? @selector(copy:)
-                           : (ch == 'v'
-                              ? @selector(paste:)
-                              : @selector(selectAll:))))
-                             to:nil from:panel];
-              ret = YES;
-            }
-        default:
-          // Send all control keys, as the text field supports C-a, C-f, C-e
-          // C-b and more.
-          if ([theEvent modifierFlags] & NSEventModifierFlagControl)
-            {
-              [panel sendEvent: theEvent];
-              ret = YES;
-            }
-          break;
-        }
-    }
-
-
-  return ret;
-}
-
 @implementation EmacsFileDelegate
 /* --------------------------------------------------------------------------
    Delegate methods for Open/Save panels

src/nsterm.m

@@ -1238,20 +1238,6 @@ ns_unfocus (struct frame *f)
 }
 
 
-static void
-ns_clip_to_row (struct window *w, struct glyph_row *row,
-		enum glyph_row_area area, BOOL gc)
-/* --------------------------------------------------------------------------
-     Internal (but parallels other terms): Focus drawing on given row
-   -------------------------------------------------------------------------- */
-{
-  struct frame *f = XFRAME (WINDOW_FRAME (w));
-  NSRect clip_rect = ns_row_rect (w, row, area);
-
-  ns_focus (f, &clip_rect, 1);
-}
-
-
 /* ==========================================================================
 
     Visible bell and beep.
@@ -2089,7 +2075,7 @@ ns_set_appearance (struct frame *f, Lisp_Object new_value, Lisp_Object old_value
 {
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 101000
   EmacsView *view = (EmacsView *)FRAME_NS_VIEW (f);
-  NSWindow *window = [view window];
+  EmacsWindow *window = (EmacsWindow *)[view window];
 
   NSTRACE ("ns_set_appearance");
 
@@ -2553,7 +2539,7 @@ ns_mouse_position (struct frame **fp, int insist, Lisp_Object *bar_window,
   id view;
   NSPoint view_position;
   Lisp_Object frame, tail;
-  struct frame *f;
+  struct frame *f = NULL;
   struct ns_display_info *dpyinfo;
 
   NSTRACE ("ns_mouse_position");
@@ -4005,7 +3991,7 @@ ns_dumpglyphs_stretch (struct glyph_string *s)
 {
   NSRect r[2];
   NSRect glyphRect;
-  int n, i;
+  int n;
   struct face *face;
   NSColor *fgCol, *bgCol;
 
@@ -5389,7 +5375,7 @@ ns_term_init (Lisp_Object display_name)
           }
 
         /* FIXME: Report any errors writing the color file below.  */
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101100
+#if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 101100
 #if MAC_OS_X_VERSION_MIN_REQUIRED < 101100
         if ([cl respondsToSelector:@selector(writeToURL:error:)])
 #endif
@@ -7395,7 +7381,7 @@ not_in_argv (NSString *arg)
 {
   NSRect r, wr;
   Lisp_Object tem;
-  NSWindow *win;
+  EmacsWindow *win;
   NSColor *col;
   NSString *name;
 
@@ -8816,7 +8802,7 @@ not_in_argv (NSString *arg)
 
 - (void)setAppearance
 {
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101000
+#if defined (NS_IMPL_COCOA) && MAC_OS_X_VERSION_MAX_ALLOWED >= 101000
   struct frame *f = ((EmacsView *)[self delegate])->emacsframe;
   NSAppearance *appearance = nil;