diff -up nvidia-texture-tools/src/nvcore/DefsGnucLinux.h.orig nvidia-texture-tools/src/nvcore/DefsGnucLinux.h

--- nvidia-texture-tools/src/nvcore/DefsGnucLinux.h.orig	2012-05-18 22:17:43.367822764 -0300

+++ nvidia-texture-tools/src/nvcore/DefsGnucLinux.h	2012-05-18 22:19:50.709827759 -0300

@@ -2,6 +2,8 @@

 #error "Do not include this file directly."

 #endif

+#include <bits/wordsize.h>

+

 // Function linkage

 #define DLL_IMPORT

 #if __GNUC__ >= 4

@@ -58,8 +60,13 @@ typedef signed short        int16;

 typedef unsigned int        uint32;

 typedef signed int          int32;

+#if __WORDSIZE == 32

 typedef unsigned long long  uint64;

 typedef signed long long    int64;

+#else

+typedef unsigned long       uint64;

+typedef signed long         int64;

+#endif

 // Aliases

 typedef uint32              uint;