+dnl ** check whether this machine has GMP 2.0 installed
+#
+AC_CHECK_LIB(gmp, mpz_fdiv_qr, HaveLibGmp=YES, HaveLibGmp=NO)
+AC_SUBST(HaveLibGmp)
+
+#
+dnl ** check whether this machine has BFD and liberty installed (used for debugging)
+dnl ** the order of these tests matters: bfd needs liberty
+#
+AC_CHECK_LIB(iberty, xmalloc)
+AC_CHECK_LIB(bfd, bfd_init)
+
+#