Fix compiler warnings in no-window-system-build

* src/composite.c (autocmp_chars): Declare and set 'f' only if
HAVE_WINDOW_SYSTEM.

* src/dispextern.h (FACE_SUITABLE_FOR_ASCII_CHAR_P)
(FACE_FOR_CHAR): Explicitly discard unused arguments.

* src/font.c (font_open_entity): Declare 'min_width' where it is
first set, and only if HAVE_WINDOW_SYSTEM.

* src/frame.c [!HAVE_WINDOW_SYSTEM] (decode_window_system_frame):
Define _Noreturn version to avoid "suggest attribute noreturn"
compiler warning.
(check_window_system): Declare as _Noreturn.
(Ficonify_frame):
(Fset_frame_position): Don’t declare and set 'f'.

* src/frame.h [!HAVE_WINDOW_SYSTEM] (decode_window_system_frame)
(check_window_system):  Add _Noreturn prototypes.
(FRAME_FRINGE_COLS, FRAME_TOTAL_FRINGE_WIDTH)
(FRAME_LEFT_FRINGE_WIDTH, FRAME_RIGHT_FRINGE_WIDTH)
(FRAME_INTERNAL_BORDER_WIDTH, FRAME_RIGHT_DIVIDER_WIDTH)
(FRAME_BOTTOM_DIVIDER_WIDTH): Explicitly discard unused argument.

* src/xdisp.c (handle_single_display_spec): Declare
'fringe_bitmap' only if HAVE_WINDOW_SYSTEM.
(append_space_for_newline): Declare 'g' where it is first set.
(Fmove_point_visually): Declare and set 'target_is_eol_p' only if
HAVE_WINDOW_SYSTEM.
(show_mouse_face): Declare and set 'f' and 'phys_cursor_on_p' only
if HAVE_WINDOW_SYSTEM.
(note_mode_line_or_margin_highlight):
(note_mouse_highlight): Declare and set 'cursor' and 'pointer'
only if HAVE_WINDOW_SYSTEM.

* src/xfaces.c (realize_default_face): Declare and set 'face' only
if HAVE_X_WINDOWS.  Remove redundant #ifdef.

7 files changed, 85 insertions, 30 deletions

diff --git a/src/composite.c b/src/composite.c
index bef1c5f7c3b..5696e3ee3a9 100644
--- a/src/composite.c
+++ b/src/composite.c
@@ -867,7 +867,11 @@ autocmp_chars (Lisp_Object rule, ptrdiff_t charpos, ptrdiff_t bytepos,
 	       Lisp_Object string)
 {
   ptrdiff_t count = SPECPDL_INDEX ();
+#ifdef HAVE_WINDOW_SYSTEM
   struct frame *f = XFRAME (win->frame);
+#else
+  (void) XFRAME (win->frame);
+#endif
   Lisp_Object pos = make_number (charpos);
   ptrdiff_t to;
   ptrdiff_t pt = PT, pt_byte = PT_BYTE;
diff --git a/src/dispextern.h b/src/dispextern.h
index e83b7c7fc83..987d7f8b048 100644
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -1843,8 +1843,11 @@ struct face_cache
 
 #else /* not HAVE_WINDOW_SYSTEM */
 
-#define FACE_SUITABLE_FOR_ASCII_CHAR_P(FACE, CHAR) true
-#define FACE_FOR_CHAR(F, FACE, CHAR, POS, OBJECT) ((FACE)->id)
+#define FACE_SUITABLE_FOR_ASCII_CHAR_P(FACE, CHAR)	   \
+  ((void) (FACE), (void) (CHAR), true)
+#define FACE_FOR_CHAR(F, FACE, CHAR, POS, OBJECT)	   \
+  ((void) (F), (void) (FACE), (void) (CHAR), (void) (POS), \
+   (void) (OBJECT), (FACE)->id)
 
 #endif /* not HAVE_WINDOW_SYSTEM */
 
diff --git a/src/font.c b/src/font.c
index f289891bf65..144ba07c42a 100644
--- a/src/font.c
+++ b/src/font.c
@@ -2863,7 +2863,7 @@ font_open_entity (struct frame *f, Lisp_Object entity, int pixel_size)
   struct font_driver_list *driver_list;
   Lisp_Object objlist, size, val, font_object;
   struct font *font;
-  int min_width, height, psize;
+  int height, psize;
 
   eassert (FONT_ENTITY_P (entity));
   size = AREF (entity, FONT_SIZE_INDEX);
@@ -2907,10 +2907,12 @@ font_open_entity (struct frame *f, Lisp_Object entity, int pixel_size)
 	Fcons (font_object, AREF (entity, FONT_OBJLIST_INDEX)));
 
   font = XFONT_OBJECT (font_object);
-  min_width = (font->min_width ? font->min_width
-	       : font->average_width ? font->average_width
-	       : font->space_width ? font->space_width
-	       : 1);
+#ifdef HAVE_WINDOW_SYSTEM
+  int min_width = (font->min_width ? font->min_width
+		   : font->average_width ? font->average_width
+		   : font->space_width ? font->space_width
+		   : 1);
+#endif
 
   int font_ascent, font_descent;
   get_font_ascent_descent (font, &font_ascent, &font_descent);
diff --git a/src/frame.c b/src/frame.c
index df9753905b2..9048452381c 100644
--- a/src/frame.c
+++ b/src/frame.c
@@ -113,8 +113,6 @@ window_system_available (struct frame *f)
   return f ? FRAME_WINDOW_P (f) || FRAME_MSDOS_P (f) : x_display_list != NULL;
 }
 
-#endif /* HAVE_WINDOW_SYSTEM */
-
 struct frame *
 decode_window_system_frame (Lisp_Object frame)
 {
@@ -125,6 +123,16 @@ decode_window_system_frame (Lisp_Object frame)
   return f;
 }
 
+#else  /* not HAVE_WINDOW_SYSTEM */
+
+_Noreturn void
+decode_window_system_frame (Lisp_Object frame)
+{
+  error ("Window system is not in use");
+}
+
+_Noreturn
+#endif	/* not HAVE_WINDOW_SYSTEM */
 void
 check_window_system (struct frame *f)
 {
@@ -2129,7 +2137,11 @@ DEFUN ("iconify-frame", Ficonify_frame, Siconify_frame,
 If omitted, FRAME defaults to the currently selected frame.  */)
   (Lisp_Object frame)
 {
+#ifdef HAVE_WINDOW_SYSTEM
   struct frame *f = decode_live_frame (frame);
+#else
+  (void) decode_live_frame (frame);
+#endif
 
   /* Don't allow minibuf_window to remain on an iconified frame.  */
   check_minibuf_window (frame, EQ (minibuf_window, selected_window));
@@ -3001,7 +3013,11 @@ or bottom edge of the outer frame of FRAME relative to the right or
 bottom edge of FRAME's display.  */)
   (Lisp_Object frame, Lisp_Object x, Lisp_Object y)
 {
+#ifdef HAVE_WINDOW_SYSTEM
   register struct frame *f = decode_live_frame (frame);
+#else
+  (void) decode_live_frame (frame);
+#endif
 
   CHECK_TYPE_RANGED_INTEGER (int, x);
   CHECK_TYPE_RANGED_INTEGER (int, y);
diff --git a/src/frame.h b/src/frame.h
index 7d64e00b422..4ee0a7411f9 100644
--- a/src/frame.h
+++ b/src/frame.h
@@ -1102,21 +1102,23 @@ extern Lisp_Object selected_frame;
 extern int frame_default_tool_bar_height;
 #endif
 
-extern struct frame *decode_window_system_frame (Lisp_Object);
 extern struct frame *decode_live_frame (Lisp_Object);
 extern struct frame *decode_any_frame (Lisp_Object);
 extern struct frame *make_initial_frame (void);
 extern struct frame *make_frame (bool);
 #ifdef HAVE_WINDOW_SYSTEM
+extern void check_window_system (struct frame *);
+extern struct frame *decode_window_system_frame (Lisp_Object);
 extern struct frame *make_minibuffer_frame (void);
 extern struct frame *make_frame_without_minibuffer (Lisp_Object,
                                                     struct kboard *,
                                                     Lisp_Object);
 extern bool window_system_available (struct frame *);
 #else /* not HAVE_WINDOW_SYSTEM */
+extern _Noreturn void check_window_system (struct frame *);
+extern _Noreturn void decode_window_system_frame (Lisp_Object);
 #define window_system_available(f) ((void) (f), false)
 #endif /* HAVE_WINDOW_SYSTEM */
-extern void check_window_system (struct frame *);
 extern void frame_make_pointer_invisible (struct frame *);
 extern void frame_make_pointer_visible (struct frame *);
 extern Lisp_Object delete_frame (Lisp_Object, Lisp_Object);
@@ -1181,13 +1183,13 @@ extern Lisp_Object Vframe_list;
 
 #else /* not HAVE_WINDOW_SYSTEM */
 
-#define FRAME_FRINGE_COLS(F)	0
-#define FRAME_TOTAL_FRINGE_WIDTH(F)	0
-#define FRAME_LEFT_FRINGE_WIDTH(F)  0
-#define FRAME_RIGHT_FRINGE_WIDTH(F) 0
-#define FRAME_INTERNAL_BORDER_WIDTH(F) 0
-#define FRAME_RIGHT_DIVIDER_WIDTH(F) 0
-#define FRAME_BOTTOM_DIVIDER_WIDTH(F) 0
+#define FRAME_FRINGE_COLS(F) ((void) (F), 0)
+#define FRAME_TOTAL_FRINGE_WIDTH(F) ((void) (F), 0)
+#define FRAME_LEFT_FRINGE_WIDTH(F) ((void) (F), 0)
+#define FRAME_RIGHT_FRINGE_WIDTH(F) ((void) (F), 0)
+#define FRAME_INTERNAL_BORDER_WIDTH(F) ((void) (F), 0)
+#define FRAME_RIGHT_DIVIDER_WIDTH(F) ((void) (F), 0)
+#define FRAME_BOTTOM_DIVIDER_WIDTH(F) ((void) (F), 0)
 
 #endif /* not HAVE_WINDOW_SYSTEM */
 
diff --git a/src/xdisp.c b/src/xdisp.c
index d589080ac4c..bcb283f8faa 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -5017,8 +5017,6 @@ handle_single_display_spec (struct it *it, Lisp_Object spec, Lisp_Object object,
 	  || EQ (XCAR (spec), Qright_fringe))
       && CONSP (XCDR (spec)))
     {
-      int fringe_bitmap;
-
       if (it)
 	{
 	  if (!FRAME_WINDOW_P (it->f))
@@ -5042,6 +5040,8 @@ handle_single_display_spec (struct it *it, Lisp_Object spec, Lisp_Object object,
 	return 1;
 
 #ifdef HAVE_WINDOW_SYSTEM
+      int fringe_bitmap;
+
       value = XCAR (XCDR (spec));
       if (!SYMBOLP (value)
 	  || !(fringe_bitmap = lookup_fringe_bitmap (value)))
@@ -19509,7 +19509,6 @@ append_space_for_newline (struct it *it, bool default_face_p)
 	  struct text_pos saved_pos;
 	  Lisp_Object saved_object;
 	  struct face *face;
-	  struct glyph *g;
 
 	  saved_object = it->object;
 	  saved_pos = it->position;
@@ -19545,7 +19544,7 @@ append_space_for_newline (struct it *it, bool default_face_p)
 	  /* Make sure this space glyph has the right ascent and
 	     descent values, or else cursor at end of line will look
 	     funny, and height of empty lines will be incorrect.  */
-	  g = it->glyph_row->glyphs[TEXT_AREA] + n;
+	  struct glyph *g = it->glyph_row->glyphs[TEXT_AREA] + n;
 	  struct font *font = face->font ? face->font : FRAME_FONT (it->f);
 	  if (n == 0)
 	    {
@@ -21687,7 +21686,9 @@ Value is the new character position of point.  */)
       int pt_x, target_x, pixel_width, pt_vpos;
       bool at_eol_p;
       bool overshoot_expected = false;
+#ifdef HAVE_WINDOW_SYSTEM
       bool target_is_eol_p = false;
+#endif
 
       /* Setup the arena.  */
       SET_TEXT_POS (pt, PT, PT_BYTE);
@@ -21802,7 +21803,9 @@ Value is the new character position of point.  */)
 	    {
 	      move_it_by_lines (&it, -1);
 	      target_x = it.last_visible_x - !FRAME_WINDOW_P (it.f);
+#ifdef HAVE_WINDOW_SYSTEM
 	      target_is_eol_p = true;
+#endif
 	      /* Under word-wrap, we don't know the x coordinate of
 		 the last character displayed on the previous line,
 		 which immediately precedes the wrap point.  To find
@@ -28594,7 +28597,11 @@ static void
 show_mouse_face (Mouse_HLInfo *hlinfo, enum draw_glyphs_face draw)
 {
   struct window *w = XWINDOW (hlinfo->mouse_face_window);
+#ifdef HAVE_WINDOW_SYSTEM
   struct frame *f = XFRAME (WINDOW_FRAME (w));
+#else
+  (void) XFRAME (WINDOW_FRAME (w));
+#endif
 
   if (/* If window is in the process of being destroyed, don't bother
 	 to do anything.  */
@@ -28605,7 +28612,9 @@ show_mouse_face (Mouse_HLInfo *hlinfo, enum draw_glyphs_face draw)
 	 anymore.  This can happen when a window is split.  */
       && hlinfo->mouse_face_end_row < w->current_matrix->nrows)
     {
+#ifdef HAVE_WINDOW_SYSTEM
       bool phys_cursor_on_p = w->phys_cursor_on_p;
+#endif
       struct glyph_row *row, *first, *last;
 
       first = MATRIX_ROW (w->current_matrix, hlinfo->mouse_face_beg_row);
@@ -29697,9 +29706,9 @@ note_mode_line_or_margin_highlight (Lisp_Object window, int x, int y,
   Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);
 #ifdef HAVE_WINDOW_SYSTEM
   Display_Info *dpyinfo;
-#endif
   Cursor cursor = No_Cursor;
   Lisp_Object pointer = Qnil;
+#endif
   int dx, dy, width, height;
   ptrdiff_t charpos;
   Lisp_Object string, object = Qnil;
@@ -29950,8 +29959,12 @@ note_mode_line_or_margin_highlight (Lisp_Object window, int x, int y,
 	       && hlinfo->mouse_face_beg_row == vpos )
 	    return;
 
+#ifdef HAVE_WINDOW_SYSTEM
 	  if (clear_mouse_face (hlinfo))
 	    cursor = No_Cursor;
+#else
+	  (void) clear_mouse_face (hlinfo);
+#endif
 
 	  if (!row->reversed_p)
 	    {
@@ -29985,8 +29998,10 @@ note_mode_line_or_margin_highlight (Lisp_Object window, int x, int y,
 	  show_mouse_face (hlinfo, DRAW_MOUSE_FACE);
 	  mouse_face_shown = true;
 
+#ifdef HAVE_WINDOW_SYSTEM
 	  if (NILP (pointer))
 	    pointer = Qhand;
+#endif
 	}
     }
 
@@ -30017,8 +30032,10 @@ note_mouse_highlight (struct frame *f, int x, int y)
   enum window_part part = ON_NOTHING;
   Lisp_Object window;
   struct window *w;
+#ifdef HAVE_WINDOW_SYSTEM
   Cursor cursor = No_Cursor;
   Lisp_Object pointer = Qnil;  /* Takes precedence over cursor!  */
+#endif
   struct buffer *b;
 
   /* When a menu is active, don't highlight because this looks odd.  */
@@ -30201,9 +30218,11 @@ note_mouse_highlight (struct frame *f, int x, int y)
 	      && glyph->type == STRETCH_GLYPH
 	      && glyph->avoid_cursor_p))
 	{
+#ifndef HAVE_WINDOW_SYSTEM
+	  (void) clear_mouse_face (hlinfo);
+#else  /* HAVE_WINDOW_SYSTEM */
 	  if (clear_mouse_face (hlinfo))
 	    cursor = No_Cursor;
-#ifdef HAVE_WINDOW_SYSTEM
 	  if (FRAME_WINDOW_P (f) && NILP (pointer))
 	    {
 	      if (area != TEXT_AREA)
@@ -30211,7 +30230,7 @@ note_mouse_highlight (struct frame *f, int x, int y)
 	      else
 		pointer = Vvoid_text_area_pointer;
 	    }
-#endif
+#endif	/* HAVE_WINDOW_SYSTEM */
 	  goto set_cursor;
 	}
 
@@ -30256,8 +30275,10 @@ note_mouse_highlight (struct frame *f, int x, int y)
 
       same_region = coords_in_mouse_face_p (w, hpos, vpos);
 
+#ifdef HAVE_WINDOW_SYSTEM
       if (same_region)
 	cursor = No_Cursor;
+#endif
 
       /* Check mouse-face highlighting.  */
       if (! same_region
@@ -30284,8 +30305,12 @@ note_mouse_highlight (struct frame *f, int x, int y)
 	  hlinfo->mouse_face_overlay = overlay;
 
 	  /* Clear the display of the old active region, if any.  */
+#ifdef HAVE_WINDOW_SYSTEM
 	  if (clear_mouse_face (hlinfo))
 	    cursor = No_Cursor;
+#else
+	  (void) clear_mouse_face (hlinfo);
+#endif
 
 	  /* If no overlay applies, get a text property.  */
 	  if (NILP (overlay))
@@ -30316,7 +30341,9 @@ note_mouse_highlight (struct frame *f, int x, int y)
 		= face_at_string_position (w, object, pos, 0, &ignore,
 					   glyph->face_id, true);
 	      show_mouse_face (hlinfo, DRAW_MOUSE_FACE);
+#ifdef HAVE_WINDOW_SYSTEM
 	      cursor = No_Cursor;
+#endif
 	    }
 	  else
 	    {
@@ -30400,7 +30427,9 @@ note_mouse_highlight (struct frame *f, int x, int y)
 					      : XFASTINT (after),
 					      before_string, after_string,
 					      disp_string);
+#ifdef HAVE_WINDOW_SYSTEM
 		  cursor = No_Cursor;
+#endif
 		}
 	    }
 	}
diff --git a/src/xfaces.c b/src/xfaces.c
index ea02ee7ccbe..faf28fc513d 100644
--- a/src/xfaces.c
+++ b/src/xfaces.c
@@ -5198,7 +5198,6 @@ realize_default_face (struct frame *f)
   struct face_cache *c = FRAME_FACE_CACHE (f);
   Lisp_Object lface;
   Lisp_Object attrs[LFACE_VECTOR_SIZE];
-  struct face *face;
 
   /* If the `default' face is not yet known, create it.  */
   lface = lface_from_face_name (f, Qdefault, false);
@@ -5288,10 +5287,11 @@ realize_default_face (struct frame *f)
   eassert (lface_fully_specified_p (XVECTOR (lface)->contents));
   check_lface (lface);
   memcpy (attrs, XVECTOR (lface)->contents, sizeof attrs);
-  face = realize_face (c, attrs, DEFAULT_FACE_ID);
 
-#ifdef HAVE_WINDOW_SYSTEM
-#ifdef HAVE_X_WINDOWS
+#ifndef HAVE_X_WINDOWS
+  (void) realize_face (c, attrs, DEFAULT_FACE_ID);
+#else  /* HAVE_X_WINDOWS */
+  struct face *face = realize_face (c, attrs, DEFAULT_FACE_ID);
   if (FRAME_X_P (f) && face->font != FRAME_FONT (f))
     {
       /* This can happen when making a frame on a display that does
@@ -5306,7 +5306,6 @@ realize_default_face (struct frame *f)
       x_set_font (f, LFACE_FONT (lface), Qnil);
     }
 #endif	/* HAVE_X_WINDOWS */
-#endif	/* HAVE_WINDOW_SYSTEM */
   return true;
 }