Dear Richy, I was planning to upgrade to GiNaC-0.7 and CLN-1.1, but I ran into a small problem: CLN-1.1 does not build out of the box on my system. After configure and make, in the "test" subdirectory: c++ -O exam.o exam_I.o exam_RA.o exam_SF.o exam_FF.o exam_DF.o exam_LF.o exam_I_gcd.o exam_I_sqrtp.o ../src/.libs/libcln.so -lm -o .libs/exam -Wl,--rpath -Wl,/usr/local/lib exam_I.o: In function `test_integer_plus(void)': exam_I.o(.text+0xc1): undefined reference to `default_print_flags' Runnnig nm -u on src/.libs/libcln.so.1.0.0 shows me that default_print_flags is indeed unresolved, together with some other symbols, which I suspect should be better resolved: ... cl_class_bignum cl_class_complex cl_class_dfloat cl_class_ffloat cl_class_fixnum cl_class_gvector_integer cl_class_gvector_number cl_class_lfloat cl_class_modint_ring cl_class_ratio cl_class_sfloat cl_class_string cl_class_svector_number cl_class_svector_ringelt cl_class_univpoly_ring default_print_flags ... I have a slight suspicion that it might be the compiler. The compiler I'm using is gcc 2.91.66 Best regards, Stefan