patch 8.1.0785: depending on the configuration some functions are unused

Problem:    Depending on the configuration some functions are unused.
Solution:   Add more #ifdefs, remove unused functions. (Dominique Pelle,
            closes #3822)

Author: brammool

src/buffer.c

@@ -5660,6 +5660,7 @@ bt_normal(buf_T *buf)
     return buf != NULL && buf->b_p_bt[0] == NUL;
 }
 
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
 /*
  * Return TRUE if "buf" is the quickfix buffer.
  */
@@ -5668,7 +5669,9 @@ bt_quickfix(buf_T *buf)
 {
     return buf != NULL && buf->b_p_bt[0] == 'q';
 }
+#endif
 
+#if defined(FEAT_TERMINAL) || defined(PROTO)
 /*
  * Return TRUE if "buf" is a terminal buffer.
  */
@@ -5677,6 +5680,7 @@ bt_terminal(buf_T *buf)
 {
     return buf != NULL && buf->b_p_bt[0] == 't';
 }
+#endif
 
 /*
  * Return TRUE if "buf" is a help buffer.
@@ -5721,6 +5725,7 @@ bt_dontwrite(buf_T *buf)
 	         || buf->b_p_bt[0] == 'p');
 }
 
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
     int
 bt_dontwrite_msg(buf_T *buf)
 {
@@ -5731,6 +5736,7 @@ bt_dontwrite_msg(buf_T *buf)
     }
     return FALSE;
 }
+#endif
 
 /*
  * Return TRUE if the buffer should be hidden, according to 'hidden', ":hide"

src/channel.c

@@ -2750,6 +2750,7 @@ may_invoke_callback(channel_T *channel, ch_part_T part)
     return TRUE;
 }
 
+#if defined(FEAT_NETBEANS_INTG) || defined(PROTO)
 /*
  * Return TRUE when channel "channel" is open for writing to.
  * Also returns FALSE or invalid "channel".
@@ -2760,6 +2761,7 @@ channel_can_write_to(channel_T *channel)
     return channel != NULL && (channel->CH_SOCK_FD != INVALID_FD
 			  || channel->CH_IN_FD != INVALID_FD);
 }
+#endif
 
 /*
  * Return TRUE when channel "channel" is open for reading or writing.

src/ex_cmds2.c

@@ -1578,7 +1578,7 @@ timer_free_all()
 #  endif
 # endif
 
-#if defined(FEAT_SYN_HL) && defined(FEAT_RELTIME) && defined(FEAT_FLOAT)
+#if defined(FEAT_SYN_HL) && defined(FEAT_RELTIME) && defined(FEAT_FLOAT) && defined(FEAT_PROFILE)
 # if defined(HAVE_MATH_H)
 #  include <math.h>
 # endif

src/ex_docmd.c

@@ -12314,13 +12314,15 @@ get_messages_arg(expand_T *xp UNUSED, int idx)
 }
 #endif
 
+#if defined(FEAT_CMDL_COMPL) || defined(PROTO)
     char_u *
 get_mapclear_arg(expand_T *xp UNUSED, int idx)
 {
     if (idx == 0)
 	return (char_u *)"<buffer>";
     return NULL;
 }
+#endif
 
 static int filetype_detect = FALSE;
 static int filetype_plugin = FALSE;

src/fileio.c

@@ -9303,6 +9303,7 @@ has_cursormoved(void)
     return (first_autopat[(int)EVENT_CURSORMOVED] != NULL);
 }
 
+#if defined(FEAT_CONCEAL) || defined(PROTO)
 /*
  * Return TRUE when there is a CursorMovedI autocommand defined.
  */
@@ -9311,6 +9312,7 @@ has_cursormovedI(void)
 {
     return (first_autopat[(int)EVENT_CURSORMOVEDI] != NULL);
 }
+#endif
 
 /*
  * Return TRUE when there is a TextChanged autocommand defined.
@@ -9330,6 +9332,7 @@ has_textchangedI(void)
     return (first_autopat[(int)EVENT_TEXTCHANGEDI] != NULL);
 }
 
+#if defined(FEAT_INS_EXPAND) || defined(PROTO)
 /*
  * Return TRUE when there is a TextChangedP autocommand defined.
  */
@@ -9338,6 +9341,7 @@ has_textchangedP(void)
 {
     return (first_autopat[(int)EVENT_TEXTCHANGEDP] != NULL);
 }
+#endif
 
 /*
  * Return TRUE when there is an InsertCharPre autocommand defined.
@@ -9366,6 +9370,7 @@ has_funcundefined(void)
     return (first_autopat[(int)EVENT_FUNCUNDEFINED] != NULL);
 }
 
+#if defined(FEAT_EVAL) || defined(PROTO)
 /*
  * Return TRUE when there is a TextYankPost autocommand defined.
  */
@@ -9374,6 +9379,7 @@ has_textyankpost(void)
 {
     return (first_autopat[(int)EVENT_TEXTYANKPOST] != NULL);
 }
+#endif
 
 /*
  * Execute autocommands for "event" and file name "fname".
@@ -9823,11 +9829,14 @@ unblock_autocmds(void)
 # endif
 }
 
+#if defined(FEAT_EVAL) && (defined(FEAT_XIM) || defined(IME_WITHOUT_XIM)) \
+	|| defined(PROTO)
     int
 is_autocmd_blocked(void)
 {
     return autocmd_blocked != 0;
 }
+#endif
 
 /*
  * Find next autocommand pattern that matches.
@@ -10088,6 +10097,7 @@ get_event_name(expand_T *xp UNUSED, int idx)
 
 #endif	/* FEAT_CMDL_COMPL */
 
+#if defined(FEAT_EVAL) || defined(PROTO)
 /*
  * Return TRUE if autocmd is supported.
  */
@@ -10196,6 +10206,7 @@ au_exists(char_u *arg)
     vim_free(arg_save);
     return retval;
 }
+#endif
 
 
 /*

src/getchar.c

@@ -413,6 +413,7 @@ stuff_empty(void)
 	 && readbuf2.bh_first.b_next == NULL);
 }
 
+#if defined(FEAT_EVAL) || defined(PROTO)
 /*
  * Return TRUE if readbuf1 is empty.  There may still be redo characters in
  * redbuf2.
@@ -422,6 +423,7 @@ readbuf1_empty(void)
 {
     return (readbuf1.bh_first.b_next == NULL);
 }
+#endif
 
 /*
  * Set a typeahead character that won't be flushed.

src/gui_gtk_x11.c

@@ -6737,11 +6737,13 @@ clip_mch_set_selection(VimClipboard *cbd UNUSED)
 {
 }
 
+#if (defined(FEAT_XCLIPBOARD) && defined(USE_SYSTEM)) || defined(PROTO)
     int
 clip_gtk_owner_exists(VimClipboard *cbd)
 {
     return gdk_selection_owner_get(cbd->gtk_sel_atom) != NULL;
 }
+#endif
 
 
 #if defined(FEAT_MENU) || defined(PROTO)

src/hashtab.c

@@ -81,6 +81,7 @@ hash_clear(hashtab_T *ht)
 	vim_free(ht->ht_array);
 }
 
+#if defined(FEAT_SPELL) || defined(PROTO)
 /*
  * Free the array of a hash table and all the keys it contains.  The keys must
  * have been allocated.  "off" is the offset from the start of the allocate
@@ -103,6 +104,7 @@ hash_clear_all(hashtab_T *ht, int off)
     }
     hash_clear(ht);
 }
+#endif
 
 /*
  * Find "key" in hashtable "ht".  "key" must not be NULL.
@@ -178,6 +180,7 @@ hash_lookup(hashtab_T *ht, char_u *key, hash_T hash)
     }
 }
 
+#if defined(FEAT_EVAL) || defined(FEAT_SYN_HL) || defined(PROTO)
 /*
  * Print the efficiency of hashtable lookups.
  * Useful when trying different hash algorithms.
@@ -194,6 +197,7 @@ hash_debug_results(void)
 				hash_count_perturb * 100 / hash_count_lookup);
 #endif
 }
+#endif
 
 /*
  * Add item with key "key" to hashtable "ht".

src/json.c

@@ -54,6 +54,7 @@ json_encode(typval_T *val, int options)
     return ga.ga_data;
 }
 
+#if defined(FEAT_JOB_CHANNEL) || defined(PROTO)
 /*
  * Encode ["nr", "val"] into a JSON format string in allocated memory.
  * "options" can contain JSON_JS, JSON_NO_NONE and JSON_NL.
@@ -83,6 +84,7 @@ json_encode_nr_expr(int nr, typval_T *val, int options)
     list_unref(listtv.vval.v_list);
     return ga.ga_data;
 }
+#endif
 
     static void
 write_string(garray_T *gap, char_u *str)
@@ -1082,6 +1084,7 @@ json_decode_all(js_read_T *reader, typval_T *res, int options)
     return OK;
 }
 
+#if defined(FEAT_JOB_CHANNEL) || defined(PROTO)
 /*
  * Decode the JSON from "reader" and store the result in "res".
  * "options" can be JSON_JS or zero;
@@ -1102,6 +1105,7 @@ json_decode(js_read_T *reader, typval_T *res, int options)
 
     return ret;
 }
+#endif
 
 /*
  * Decode the JSON from "reader" to find the end of the message.

src/mbyte.c

@@ -844,6 +844,7 @@ bomb_size(void)
     return n;
 }
 
+#if defined(FEAT_QUICKFIX) || defined(PROTO)
 /*
  * Remove all BOM from "s" by moving remaining text.
  */
@@ -863,6 +864,7 @@ remove_bom(char_u *s)
 	}
     }
 }
+#endif
 
 /*
  * Get class of pointer: