diff -up nvidia-texture-tools/src/nvcore/Debug.cpp.orig nvidia-texture-tools/src/nvcore/Debug.cpp
--- nvidia-texture-tools/src/nvcore/Debug.cpp.orig	2012-05-18 22:10:11.359805471 -0300
+++ nvidia-texture-tools/src/nvcore/Debug.cpp	2012-05-18 22:11:15.588807912 -0300
@@ -34,6 +34,10 @@
 #	endif
 #endif
 
+#if NV_OS_LINUX
+#	include <unistd.h>	// getpid
+#endif
+
 #if NV_OS_DARWIN
 #	include <unistd.h>	// getpid
 #	include <sys/types.h>