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

src/common/filefn.cpp

@@ -49,11 +49,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#if !wxONLY_WATCOM_EARLIER_THAN(1,4)
-    #if !(defined(_MSC_VER) && (_MSC_VER > 800))
-        #include <errno.h>
-    #endif
-#endif
+#include <errno.h>
 
 #if defined(__WXMAC__)
     #include  "wx/osx/private.h"  // includes mac headers
@@ -1152,7 +1148,6 @@ bool wxRemoveFile(const wxString& file)
 {
 #if defined(__VISUALC__) \
  || defined(__BORLANDC__) \
- || defined(__WATCOMC__) \
  || defined(__DMC__) \
  || defined(__GNUWIN32__)
     int res = wxRemove(file);
@@ -1187,10 +1182,7 @@ bool wxMkdir(const wxString& dir, int perm)
   #endif
 #elif defined(__DOS__)
     const wxChar *dirname = dir.c_str();
-  #if defined(__WATCOMC__)
-    (void)perm;
-    if ( wxMkDir(wxFNSTRINGCAST wxFNCONV(dirname)) != 0 )
-  #elif defined(__DJGPP__)
+  #if defined(__DJGPP__)
     if ( mkdir(wxFNCONV(dirname), perm) != 0 )
   #else
     #error "Unsupported DOS compiler!"
@@ -1817,12 +1809,10 @@ wxFileKind wxGetFileKind(int fd)
 
 wxFileKind wxGetFileKind(FILE *fp)
 {
-    // Note: The watcom rtl dll doesn't have fileno (the static lib does).
-    //       Should be fixed in version 1.4.
-#if defined(wxFILEKIND_STUB) || wxONLY_WATCOM_EARLIER_THAN(1,4)
+#if defined(wxFILEKIND_STUB)
     (void)fp;
     return wxFILE_KIND_DISK;
-#elif defined(__WINDOWS__) && !defined(__CYGWIN__) && !defined(__WATCOMC__) && !defined(__WINE__)
+#elif defined(__WINDOWS__) && !defined(__CYGWIN__) && !defined(__WINE__)
     return fp ? wxGetFileKind(_fileno(fp)) : wxFILE_KIND_UNKNOWN;
 #else
     return fp ? wxGetFileKind(fileno(fp)) : wxFILE_KIND_UNKNOWN;