Index: configure.ac
===================================================================
diff -u -N -rb439657b5300f77fd03a9be3e768994d82c4e623 -rd4cb464a468e34a3d5dbf11d567d24571d31a55a
--- configure.ac	(.../configure.ac)	(revision b439657b5300f77fd03a9be3e768994d82c4e623)
+++ configure.ac	(.../configure.ac)	(revision d4cb464a468e34a3d5dbf11d567d24571d31a55a)
@@ -122,6 +122,9 @@
 # AC_DEFINE_UNQUOTED([NSF_COMMIT], "$nsf_commit", 
 #       	     [Commit ID at the time of the last configure run.])
 
+AC_CHECK_TYPES([intptr_t, uintptr_t])
+
+
 #--------------------------------------------------------------------
 # Load the tclConfig.sh file
 #--------------------------------------------------------------------