On Sat, 11 Jan 2014, Steve M. Robbins wrote: > Just to be sure: did you tell your C++ > compiler that gmp is C by doing something like > > extern "C" { > #include <gmp.h> > } Just to be sure: that's advice on what *NOT* to do. gmp.h works fine in C and C++ as is and messing with extern "C" is only going to cause problems. -- Marc Glisse