Fix a few wide character build issues

libc/locale/Make.defs

@@ -37,7 +37,7 @@ ifeq ($(CONFIG_LIBC_LOCALE),y)
 
 # Add the locale files to the build
 
-CSRCS += lib_setlocale.c
+CSRCS += lib_setlocale.c lib_localeconv.c
 
 # Add the locale directory to the build
 

libc/locale/lib_localeconv.c

@@ -60,7 +60,7 @@
  *
  ****************************************************************************/
 
-FAR struct lconv *localeconv(void);
+FAR struct lconv *localeconv(void)
 {
   /* NULL indicates the the locale was not changed */
 

libc/stdlib/Make.defs

@@ -45,6 +45,10 @@ ifeq ($(CONFIG_FS_WRITABLE),y)
 CSRCS += lib_mktemp.c lib_mkstemp.c
 endif
 
+ifeq ($(CONFIG_LIBC_WCHAR),y)
+CSRCS += lib_mbtowc.c lib_wctomb.c
+endif
+
 ifeq ($(CONFIG_PSEUDOTERM_SUSV1),y)
 CSRCS += lib_ptsname.c lib_ptsnamer.c
 endif

libc/stdlib/lib_mbtowc.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * libc/wchar/lib_mbtowc.c
+ * libc/stdlib/lib_mbtowc.c
  *
  *   Copyright (c)1999 Citrus Project,
  *   All rights reserved.

libc/stdlib/lib_wctomb.c

@@ -1,5 +1,5 @@
 /****************************************************************************
- * libc/wchar/lib_wctomb.c
+ * libc/stdlib/lib_wctomb.c
  *
  * This code is derived from software contributed to Berkeley by
  * Chris Torek.
@@ -35,9 +35,10 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#include <wchar.h>
+
 #include <string.h>
 #include <stdlib.h>
+#include <wchar.h>
 #include <errno.h>
 
 #ifdef CONFIG_LIBC_WCHAR

libc/wchar/Make.defs

@@ -38,9 +38,8 @@ ifeq ($(CONFIG_LIBC_WCHAR),y)
 # Add the internal C files to the build
 
 CSRCS += lib_wcscmp.c lib_wcslen.c lib_wmemchr.c lib_wmemcmp.c lib_wmemcpy.c
-CSRCS += lib_wmemmove.c lib_wmemset.c lib_mbtowc.c lib_btowc.c lib_mbrtowc.c
-CSRCS += lib_wctomb.c lib_wctob.c lib_wcslcpy.c lib_wcsxfrm.c lib_wctype.c
-CSRCS += lib_wcrtomb.c
+CSRCS += lib_wmemmove.c lib_wmemset.c lib_btowc.c lib_mbrtowc.c lib_wctob.c
+CSRCS +=lib_wcslcpy.c lib_wcsxfrm.c lib_wcrtomb.c
 
 # Add the wchar directory to the build
 

libc/wchar/lib_btowc.c

@@ -33,10 +33,11 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#include <wchar.h>
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <wchar.h>
 
 #ifdef CONFIG_LIBC_WCHAR
 
@@ -54,18 +55,18 @@
 
 wint_t btowc(int c)
 {
-  int retval = 0;
   wchar_t pwc;
-  unsigned char b;
+  char b;
+  int retval = 0;
 
   if (c == EOF)
     {
       return WEOF;
     }
 
-  b = (unsigned char)c;
+  b = (char)c;
 
-  retval = mbtowc(&pwc, &b, 1);
+  retval = mbtowc(&pwc, (FAR const char *)&b, 1);
 
   if (retval != 0 && retval != 1)
     {

libc/wchar/lib_mbrtowc.c

@@ -33,11 +33,12 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#include <wchar.h>
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
+#include <wchar.h>
 
 #ifdef CONFIG_LIBC_WCHAR
 
@@ -68,11 +69,11 @@ size_t mbrtowc(FAR wchar_t *pwc, FAR const char *s, size_t n, mbstate_t *ps)
 
   if (retval == -1)
     {
-      return (size_t) (-1);
+      return (size_t)(-1);
     }
   else
     {
-      return (size_t) retval;
+      return (size_t)retval;
     }
 }
 #endif

libc/wchar/lib_wcsxfrm.c

@@ -32,6 +32,7 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
+
 #include <string.h>
 #include <wchar.h>
 

libc/wchar/lib_wctob.c

@@ -35,9 +35,11 @@
  ****************************************************************************/
 
 #include <nuttx/config.h>
-#include <wchar.h>
+
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
+#include <wchar.h>
 #include <limits.h>
 
 #ifdef CONFIG_LIBC_WCHAR