http://benji3up2kxewkqfcq7buxk2xd6zwy3zggnurkrm3l4cvwy2iipvyyad.onion/mirrors/gmpdoc/Headers-and-Libraries.html
And <obstack.h> for prototypes
with struct obstack parameters, such as gmp_obstack_printf , when
available. All programs using GMP must link against the libgmp library. On a
typical Unix-like system this can be done with ‘ -lgmp ’, for example gcc myprogram.c -lgmp GMP C++ functions are in a separate libgmpxx library, including the C++ Class Interface but also C++ Formatted Output for regular
GMP types.