Borland builds also need ssize_t typedef'd. Watcom can come along for the ride.

src/xpdev/gen_defs.h

@@ -172,10 +172,8 @@ typedef ulong   uint32_t;
 #endif
 
 #if !defined(__MSDOS__)
-#if defined(_MSC_VER) // when and where will Microsoft typedef ssize_t (correctly) in the future?
-typedef SSIZE_T ssize_t;
-#endif
 #if defined(_MSC_VER) || defined(__WATCOMC__) || defined(__BORLANDC__)
+typedef SSIZE_T ssize_t;
 typedef signed __int64 int64_t;
 typedef unsigned __int64 uint64_t;
 #define INTTYPES_H_64BIT_PREFIX         "I64"