Make the wchar_t type machine dependent.

This is required for ARM EABI. Section 7.1.1 of the Procedure Call for the
ARM Architecture (AAPCS) defines wchar_t as either an unsigned int or an
unsigned short with the former preferred.

Because of this requirement we need to move the definition of __wchar_t to
a machine dependent header. It also cleans up the macros defining the limits
of wchar_t by defining __WCHAR_MIN and __WCHAR_MAX in the same machine
dependent header then using them to define WCHAR_MIN and WCHAR_MAX
respectively.

Discussed with:	bde

1 files changed, 4 insertions, 5 deletions

diff --git a/sys/sys/_types.h b/sys/sys/_types.h
index c59afd3..27ecaf4 100644
--- a/sys/sys/_types.h
+++ b/sys/sys/_types.h
@@ -80,14 +80,13 @@ typedef int		__cpusetid_t;	/* cpuset identifier. */
  * ANSI C), but they use __ct_rune_t instead of int.
  *
  * NOTE: rune_t is not covered by ANSI nor other standards, and should not
- * be instantiated outside of lib/libc/locale.  Use wchar_t.  wchar_t and
- * rune_t must be the same type.  Also, wint_t must be no narrower than
- * wchar_t, and should be able to hold all members of the largest
- * character set plus one extra value (WEOF), and must be at least 16 bits.
+ * be instantiated outside of lib/libc/locale.  Use wchar_t.  wint_t and
+ * rune_t must be the same type.  Also, wint_t should be able to hold all
+ * members of the largest character set plus one extra value (WEOF), and
+ * must be at least 16 bits.
  */
 typedef	int		__ct_rune_t;	/* arg type for ctype funcs */
 typedef	__ct_rune_t	__rune_t;	/* rune_t (see above) */
-typedef	__ct_rune_t	__wchar_t;	/* wchar_t (see above) */
 typedef	__ct_rune_t	__wint_t;	/* wint_t (see above) */
 
 typedef	__uint32_t	__dev_t;	/* device number */