http://bugs.gentoo.org/147567

--- configure
+++ configure
@@ -3721,6 +3721,11 @@
   #endif
 
   #include "$kerneldir/include/linux/version.h"
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
+# include "$kerneldir/include/linux/utsrelease.h"
+#endif
+
 int
 main ()
 {