Remove (Open)Watcom support.

This compiler is not being developed since several years and almost certainly
can't be used to build the current wxWidgets sources anyhow, so remove all
support for it, including a lot of extremely ugly workarounds for its bugs
with template functions.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76546 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/defs.h

@@ -243,8 +243,6 @@ typedef short int WXTYPE;
         #define HAVE_EXPLICIT
     #elif defined(__DIGITALMARS__)
         #define HAVE_EXPLICIT
-    #elif defined(__WATCOMC__)
-        #define HAVE_EXPLICIT
     #endif
 #endif /*  !HAVE_EXPLICIT */
 
@@ -421,13 +419,6 @@ typedef short int WXTYPE;
            special cases.
          */
 
-        #ifdef __WATCOMC__
-            /* Watcom uses array type for va_list except for PPC and Alpha */
-            #if !defined(__PPC__) && !defined(__AXP__)
-                #define VA_LIST_IS_ARRAY
-            #endif
-        #endif /* __WATCOMC__ */
-
         #if defined(__PPC__) && (defined(_CALL_SYSV) || defined (_WIN32))
             /*
                 PPC using SysV ABI and NT/PPC are special in that they use an
@@ -882,10 +873,6 @@ typedef short int WXTYPE;
 /*  compiler specific settings */
 /*  ---------------------------------------------------------------------------- */
 
-#if wxONLY_WATCOM_EARLIER_THAN(1,4)
-    typedef short mode_t;
-#endif
-
 /*  where should i put this? we need to make sure of this as it breaks */
 /*  the <iostream> code. */
 #if !wxUSE_IOSTREAMH && defined(__WXDEBUG__)
@@ -1128,10 +1115,6 @@ typedef wxUint32 wxDword;
     #define wxLongLong_t __int64
     #define wxLongLongSuffix i64
     #define wxLongLongFmtSpec "L"
-#elif (defined(__WATCOMC__) && (defined(__WIN32__) || defined(__DOS__)))
-      #define wxLongLong_t __int64
-      #define wxLongLongSuffix i64
-      #define wxLongLongFmtSpec "L"
 #elif defined(__DIGITALMARS__)
       #define wxLongLong_t __int64
       #define wxLongLongSuffix LL
@@ -1218,8 +1201,6 @@ typedef wxUint32 wxDword;
     #if defined(_SSIZE_T_) || defined(_SSIZE_T_DEFINED)
         #define HAVE_SSIZE_T
     #endif
-#elif wxCHECK_WATCOM_VERSION(1,4)
-    #define HAVE_SSIZE_T
 #endif
 #endif /* !HAVE_SSIZE_T */