Fix FTBFS on mips64el architecture due to missing definition of the _XSERVER64 macro.

nx-X11/config/cf/Imake.cf

@@ -883,6 +883,9 @@ XCOMM Keep cpp from replacing path elements containing i486/i586/i686
 #  undef __mips__
 #  if defined(MIPSEL) || defined(_MIPSEL)
 #   define MipselArchitecture
+#   if (_MIPS_SIM == _ABI64)
+#    define Mips64elArchitecture
+#   endif
 #  endif
 #  undef MIPSEL
 #  undef _MIPSEL

nx-X11/config/cf/linux.cf

@@ -723,7 +723,7 @@ XCOMM binutils:	(LinuxBinUtilsMajorVersion)
 # define ServerExtraDefines	-DGCCUSESGAS XFree86ServerDefines
 #endif /* Mc68020Architecture */
 
-#ifdef MipsArchitecture
+#if defined(MipsArchitecture) && !defined(MipselArchitecture)
 # ifndef OptimizedCDebugFlags
 #  define OptimizedCDebugFlags	DefaultGcc2MipsOpt
 # endif
@@ -732,6 +732,19 @@ XCOMM binutils:	(LinuxBinUtilsMajorVersion)
 # define ServerExtraDefines	-DGCCUSESGAS XFree86ServerDefines
 #endif
 
+#ifdef MipselArchitecture
+# ifndef OptimizedCDebugFlags
+#  define OptimizedCDebugFlags	DefaultGcc2MipsOpt
+# endif
+# define LinuxMachineDefines	-D__MIPSEL__
+# define ServerOSDefines	XFree86ServerOSDefines -DDDXTIME
+# ifdef Mips64elArchitecture
+#  define ServerExtraDefines	-DGCCUSESGAS XFree86ServerDefines -D_XSERVER64
+# else
+#  define ServerExtraDefines	-DGCCUSESGAS XFree86ServerDefines
+# endif
+#endif
+
 #ifdef Ppc64Architecture
 # define DefaultCCOptions	-mminimal-toc
 # ifndef OptimizedCDebugFlags