I'm having trouble getting started with building yhc on MacOS. The configure step does not get very far: $ ./configure --prefix=/sw checking for gcc... gcc checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ANSI C... none needed checking for __gmpz_init in -lgmp... no configure: error: cannot find libgmp However, I do have libgmp installed, in /sw/lib, and my LD_LIBRARY_PATH variable points to that directory. Any ideas? Regards, Malcolm