Hello Bronek,

I have received updated <cmath> from Comeau and it contains all necessary functions - I just removed your workaround on my machine and performed tests, everything is fine. If anybody is interested, I can send out fixed <cmath> file for libcomo 31. Support for Comeau compiler is incredibly responsive, I think they treat it personally ;-)

Excellent. I think we can now assume the problem will not exist in future libcomo versions. I have made the uBLAS config.hpp library version dependant on this assumption.. #if defined (__COMO__) && ! defined (BOOST_STRICT_CONFIG) // Missing std::abs overloads for float types in <cmath> are in <cstdlib> #if defined(__LIBCOMO__) && (__LIBCOMO_VERSION__ <= 31) #include <cstdlib> #endif #endif Michael