Index: trunk/psModules/configure.in
===================================================================
--- trunk/psModules/configure.in	(revision 1888)
+++ trunk/psModules/configure.in	(revision 2164)
@@ -64,3 +64,6 @@
 AC_CHECK_LIB(pslib,main,,AC_MSG_ERROR(psLib library required))
 
+dnl for MacOSX, where sqrtf is in mx
+AC_CHECK_LIB(mx,sqrtf)
+
 AC_OUTPUT(Makefile src/Makefile test/Makefile)