remove HAVE_WCHAR_H

config/config.h.in

@@ -85,7 +85,6 @@
 #define HAVE_UTIME 1
 #define HAVE_UTIME_H 1
 #define HAVE_UTIMES 1
-#define HAVE_WCHAR_H 1
 #define HAVE_WCTYPE_H 1
 #cmakedefine HAVE_WORKING_LIBINTL
 #define RETSIGTYPE void

src/charset.c

@@ -4,6 +4,7 @@
 
 #include <string.h>
 #include <wctype.h>
+#include <wchar.h>  // for towupper() and towlower()
 
 #include "vim.h"
 #include "charset.h"
@@ -19,9 +20,6 @@
 
 static int win_chartabsize(win_T *wp, char_u *p, colnr_T col);
 
-#if defined(HAVE_WCHAR_H)
-# include <wchar.h>  // for towupper() and towlower()
-#endif  // if defined(HAVE_WCHAR_H)
 static int win_nolbr_chartabsize(win_T *wp, char_u *s, colnr_T col,
                                  int *headp);
 

src/mbyte.c

@@ -78,6 +78,7 @@
  */
 
 #include <string.h>
+# include <wchar.h>
 
 #include "vim.h"
 #include "mbyte.h"
@@ -95,15 +96,6 @@
 
 # define WINBYTE BYTE
 
-
-
-
-#ifdef HAVE_WCHAR_H
-# include <wchar.h>
-#endif
-
-
-
 static int enc_canon_search(char_u *name);
 static int dbcs_char2len(int c);
 static int dbcs_char2bytes(int c, char_u *buf);

src/spell.c

@@ -964,9 +964,7 @@ static void close_spellbuf(buf_T *buf);
  * differ from what the .spl file uses.
  * These must not be called with negative number!
  */
-# if defined(HAVE_WCHAR_H)
-#  include <wchar.h>        /* for towupper() and towlower() */
-# endif
+#include <wchar.h>        /* for towupper() and towlower() */
 /* Multi-byte implementation.  For Unicode we can call utf_*(), but don't do
  * that for ASCII, because we don't want to use 'casemap' here.  Otherwise use
  * the "w" library function for characters above 255. */