move WinSock definitions of EBADF, EINTR, EINVAL and EAFNOSUPPORT to setup_once.h

ares/setup_once.h

@@ -276,6 +276,12 @@ typedef int sig_atomic_t;
  */
 
 #ifdef USE_WINSOCK
+#undef  EBADF            /* override definition in errno.h */
+#define EBADF            WSAEBADF
+#undef  EINTR            /* override definition in errno.h */
+#define EINTR            WSAEINTR
+#undef  EINVAL           /* override definition in errno.h */
+#define EINVAL           WSAEINVAL
 #define EWOULDBLOCK      WSAEWOULDBLOCK
 #define EINPROGRESS      WSAEINPROGRESS
 #define EALREADY         WSAEALREADY

lib/inet_pton.c

@@ -41,10 +41,6 @@
 #define INADDRSZ         4
 #define INT16SZ          2
 
-#ifdef USE_WINSOCK
-#define EAFNOSUPPORT    WSAEAFNOSUPPORT
-#endif
-
 /*
  * WARNING: Don't even consider trying to compile this on a system where
  * sizeof(int) < 4.  sizeof(int) > 4 is fine; all the world's not a VAX.

lib/select.c

@@ -23,8 +23,6 @@
 
 #include "setup.h"
 
-#include <errno.h>
-
 #ifdef HAVE_SYS_SELECT_H
 #include <sys/select.h>
 #endif
@@ -51,15 +49,6 @@
 #include "connect.h"
 #include "select.h"
 
-#ifdef USE_WINSOCK
-#  undef  EBADF
-#  define EBADF  WSAEBADF
-#  undef  EINTR
-#  define EINTR  WSAEINTR
-#  undef  EINVAL
-#  define EINVAL WSAEINVAL
-#endif
-
 /* Winsock and TPF sockets are not in range [0..FD_SETSIZE-1] */
 
 #if defined(USE_WINSOCK) || defined(TPF)

lib/setup_once.h

@@ -283,6 +283,12 @@ typedef int sig_atomic_t;
  */
 
 #ifdef USE_WINSOCK
+#undef  EBADF            /* override definition in errno.h */
+#define EBADF            WSAEBADF
+#undef  EINTR            /* override definition in errno.h */
+#define EINTR            WSAEINTR
+#undef  EINVAL           /* override definition in errno.h */
+#define EINVAL           WSAEINVAL
 #define EWOULDBLOCK      WSAEWOULDBLOCK
 #define EINPROGRESS      WSAEINPROGRESS
 #define EALREADY         WSAEALREADY