--- crrcsim/configure.ac.orig 2012-05-14 08:18:50.872454465 +1000
+++ crrcsim/configure.ac 2012-05-14 08:34:47.713680910 +1000
@@ -227,6 +227,8 @@
     CGAL_CFLAGS=-frounding-math
     CGAL_LIBS=-lCGAL
     AC_DEFINE([WINDDATA3D], [1], [Import code for wind data, needs CGAL, 0 to disable])
+ AC_CHECK_LIB(gmp,__gmpq_init,,AC_MSG_ERROR([gmp library not found. Please install it.]))
+ AC_CHECK_LIB(boost_thread-mt,main,,AC_MSG_ERROR([boost_thread-mt library not found. Please install it.]))
 else
     has_CGAL="no   (CGAL not found)"
     CGAL_LIBS=