--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1177,8 +1177,6 @@ A jump table for the options with a shor
 				 Unix: "/tmp/*,$TMPDIR/*,$TMP/*,$TEMP/*"
 				 Mac: "/private/tmp/*,$TMPDIR/*,$TMP/*,$TEMP/*")
 			global
-			{not available when compiled without the |+wildignore|
-			feature}
 	A list of file patterns.  When one of the patterns matches with the
 	name of the file which is written, no backup file is created.  Both
 	the specified file name and the full path name of the file are used.
@@ -9024,8 +9022,6 @@ A jump table for the options with a shor
 						*'wildignore'* *'wig'*
 'wildignore' 'wig'	string	(default "")
 			global
-			{not available when compiled without the |+wildignore|
-			feature}
 	A list of file patterns.  A file that matches with one of these
 	patterns is ignored when expanding |wildcards|, completing file or
 	directory names, and influences the result of |expand()|, |glob()| and
@@ -9156,8 +9152,6 @@ A jump table for the options with a shor
 						*'wildoptions'* *'wop'*
 'wildoptions' 'wop'	string	(default "")
 			global
-			{not available when compiled without the |+wildignore|
-			feature}
 	A list of words that change how |cmdline-completion| is done.
 	The following values are supported:
 	  fuzzy		Use |fuzzy-matching| to find completion matches. When

--- a/runtime/doc/various.txt
+++ b/runtime/doc/various.txt
@@ -490,7 +490,7 @@ T  *+visual*		Visual mode |Visual-mode| 
 T  *+visualextra*	extra Visual mode commands |blockwise-operators|
 T  *+vreplace*		|gR| and |gr|
    *+vtp*		on MS-Windows console: support for 'termguicolors'
-N  *+wildignore*	|'wildignore'|
+T  *+wildignore*	|'wildignore'|  Always enabled since 9.0.0278
 N  *+wildmenu*		|'wildmenu'|
 T  *+windows*		more than one window; Always enabled since 8.0.1118.
 m  *+writebackup*	|'writebackup'| is default on

--- a/src/bufwrite.c
+++ b/src/bufwrite.c
@@ -1136,10 +1136,8 @@ buf_write(
 
     // If 'backupskip' is not empty, don't make a backup for some files.
     dobackup = (p_wb || p_bk || *p_pm != NUL);
-#ifdef FEAT_WILDIGN
     if (dobackup && *p_bsk != NUL && match_file_list(p_bsk, sfname, ffname))
 	dobackup = FALSE;
-#endif
 
     // Save the value of got_int and reset it.  We don't want a previous
     // interruption cancel writing, only hitting CTRL-C while writing should

--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -6260,13 +6260,7 @@ f_has(typval_T *argvars, typval_T *rettv
 		0
 #endif
 		},
-	{"wildignore",
-#ifdef FEAT_WILDIGN
-		1
-#else
-		0
-#endif
-		},
+	{"wildignore", 1},
 	{"wildmenu",
 #ifdef FEAT_WILDMENU
 		1

--- a/src/feature.h
+++ b/src/feature.h
@@ -118,6 +118,7 @@
  * +textobjects		Text objects: "vaw", "das", etc.
  * +file_in_path	"gf" and "<cfile>" commands.
  * +path_extra		up/downwards searching in 'path' and 'tags'.
+ * +wildignore		'wildignore' and 'backupskip' options
  *
  * Obsolete:
  * +tag_old_static	Old style static tags: "file:tag  file  ..".
@@ -285,7 +286,7 @@
 /*
  * +timers		timer_start()
  */
-#if defined(FEAT_RELTIME) && (defined(UNIX) || defined(MSWIN) || defined(VMS) )
+#if defined(FEAT_RELTIME) && (defined(UNIX) || defined(MSWIN) || defined(VMS))
 # define FEAT_TIMERS
 #endif
 
@@ -338,14 +339,6 @@
 #endif
 
 /*
- * +wildignore		'wildignore' and 'backupskip' options
- *			Needed for Unix to make "crontab -e" work.
- */
-#if defined(FEAT_NORMAL) || defined(UNIX)
-# define FEAT_WILDIGN
-#endif
-
-/*
  * +wildmenu		'wildmenu' option
  */
 #if defined(FEAT_NORMAL)

--- a/src/fileio.c
+++ b/src/fileio.c
@@ -312,7 +312,9 @@ readfile(
 	curbuf->b_op_start = orig_start;
 
 	if (flags & READ_NOFILE)
-	    return NOTDONE;  // so that BufEnter can be triggered
+	    // Return NOTDONE instead of FAIL so that BufEnter can be triggered
+	    // and other operations don't fail.
+	    return NOTDONE;
     }
 
     if ((shortmess(SHM_OVER) || curbuf->b_help) && p_verbose == 0)
@@ -5402,7 +5404,6 @@ match_file_pat(
     return result;
 }
 
-#if defined(FEAT_WILDIGN) || defined(PROTO)
 /*
  * Return TRUE if a file matches with a pattern in "list".
  * "list" is a comma-separated list of patterns, like 'wildignore'.
@@ -5436,7 +5437,6 @@ match_file_list(char_u *list, char_u *sf
     }
     return FALSE;
 }
-#endif
 
 /*
  * Convert the given pattern "pat" which has shell style wildcards in it, into

--- a/src/filepath.c
+++ b/src/filepath.c
@@ -3136,7 +3136,6 @@ expand_wildcards(
     if ((flags & EW_KEEPALL) || retval == FAIL)
 	return retval;
 
-#ifdef FEAT_WILDIGN
     /*
      * Remove names that match 'wildignore'.
      */
@@ -3172,7 +3171,6 @@ expand_wildcards(
 	    return FAIL;
 	}
     }
-#endif
 
     /*
      * Move the names where 'suffixes' match to the end.

--- a/src/option.c
+++ b/src/option.c
@@ -126,17 +126,16 @@ set_init_1(int clean_arg)
 	set_string_default_esc("sh", p, TRUE);
 #endif
 
-#ifdef FEAT_WILDIGN
     /*
      * Set the default for 'backupskip' to include environment variables for
      * temp files.
      */
     {
-# ifdef UNIX
+#ifdef UNIX
 	static char	*(names[4]) = {"", "TMPDIR", "TEMP", "TMP"};
-# else
+#else
 	static char	*(names[3]) = {"TMPDIR", "TEMP", "TMP"};
-# endif
+#endif
 	int		len;
 	garray_T	ga;
 	int		mustfree;
@@ -148,15 +147,15 @@ set_init_1(int clean_arg)
 	for (n = 0; n < (long)ARRAY_LENGTH(names); ++n)
 	{
 	    mustfree = FALSE;
-# ifdef UNIX
+#ifdef UNIX
 	    if (*names[n] == NUL)
-#  ifdef MACOS_X
+# ifdef MACOS_X
 		p = (char_u *)"/private/tmp";
-#  else
+# else
 		p = (char_u *)"/tmp";
-#  endif
+# endif
 	    else
-# endif
+#endif
 		p = vim_getenv((char_u *)names[n], &mustfree);
 	    if (p != NULL && *p != NUL)
 	    {
@@ -186,7 +185,6 @@ set_init_1(int clean_arg)
 	    vim_free(ga.ga_data);
 	}
     }
-#endif
 
     /*
      * 'maxmemtot' and 'maxmem' may have to be adjusted for available memory

--- a/src/option.h
+++ b/src/option.h
@@ -451,9 +451,7 @@ EXTERN unsigned	bo_flags;
 #define BO_TERM		0x40000
 #define BO_WILD		0x80000
 
-#ifdef FEAT_WILDIGN
 EXTERN char_u	*p_bsk;		// 'backupskip'
-#endif
 #ifdef FEAT_CRYPT
 EXTERN char_u	*p_cm;		// 'cryptmethod'
 #endif
@@ -1061,9 +1059,7 @@ EXTERN long	p_window;	// 'window'
 #define FEAT_WAK
 EXTERN char_u	*p_wak;		// 'winaltkeys'
 #endif
-#ifdef FEAT_WILDIGN
 EXTERN char_u	*p_wig;		// 'wildignore'
-#endif
 EXTERN int	p_wiv;		// 'weirdinvert'
 EXTERN char_u	*p_ww;		// 'whichwrap'
 EXTERN long	p_wc;		// 'wildchar'

--- a/src/optiondefs.h
+++ b/src/optiondefs.h
@@ -427,13 +427,8 @@ static struct vimoption options[] =
 #endif
 					    (char_u *)0L} SCTX_INIT},
     {"backupskip",  "bsk",  P_STRING|P_VI_DEF|P_ONECOMMA|P_NODUP,
-#ifdef FEAT_WILDIGN
 			    (char_u *)&p_bsk, PV_NONE,
 			    {(char_u *)"", (char_u *)0L}
-#else
-			    (char_u *)NULL, PV_NONE,
-			    {(char_u *)0L, (char_u *)0L}
-#endif
 			    SCTX_INIT},
     {"balloondelay","bdlay",P_NUM|P_VI_DEF,
 #ifdef FEAT_BEVAL
@@ -2757,11 +2752,7 @@ static struct vimoption options[] =
 			    (char_u *)&p_wcm, PV_NONE,
 			    {(char_u *)0L, (char_u *)0L} SCTX_INIT},
     {"wildignore",  "wig",  P_STRING|P_VI_DEF|P_ONECOMMA|P_NODUP,
-#ifdef FEAT_WILDIGN
 			    (char_u *)&p_wig, PV_NONE,
-#else
-			    (char_u *)NULL, PV_NONE,
-#endif
 			    {(char_u *)"", (char_u *)0L} SCTX_INIT},
     {"wildignorecase", "wic", P_BOOL|P_VI_DEF,
 			    (char_u *)&p_wic, PV_NONE,

--- a/src/version.c
+++ b/src/version.c
@@ -655,11 +655,7 @@ static char *(features[]) =
 	"-vtp",
 # endif
 #endif
-#ifdef FEAT_WILDIGN
 	"+wildignore",
-#else
-	"-wildignore",
-#endif
 #ifdef FEAT_WILDMENU
 	"+wildmenu",
 #else
@@ -724,6 +720,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    278,
+/**/
     277,
 /**/
     276,