* libc/string/swab.c: Specify that it's defined in <unistd.h>.

* libc/include/string.h: Don't include <sys/types.h>,
	as it causes really bad namespace pollution.  Don't declare
	swab(), it is properly declared in unistd.h.

newlib/libc/include/string.h

@@ -13,7 +13,6 @@ extern "C" {
 
 #include "_ansi.h"
 #include <sys/reent.h>
-#include <sys/types.h>
 
 #define __need_size_t
 #include <stddef.h>
@@ -72,7 +71,6 @@ const char  *_EXFUN(strsignal, (int __signo));
 #endif
 int     _EXFUN(strtosigno, (const char *__name));
 #endif
-void	 _EXFUN(swab,(const void *, void *, ssize_t));
 
 /* These function names are used on Windows and perhaps other systems.  */
 #ifndef strcmpi

newlib/libc/string/swab.c

@@ -3,7 +3,7 @@ FUNCTION
 	<<swab>>---swap adjacent bytes
 
 ANSI_SYNOPSIS
-	#include <string.h>
+	#include <unistd.h>
 	void swab(const void *<[in]>, void *<[out]>, ssize_t <[n]>);
 
 TRAD_SYNOPSIS