http://benji3up2kxewkqfcq7buxk2xd6zwy3zggnurkrm3l4cvwy2iipvyyad.onion/mirrors/gmpdoc/Introduction-to-GMP.html
If you have a system with multiple
ABIs, then read ABI and ISA , for the compiler options that must be used
on applications. The rest of the manual can be used for later reference, although it is
probably a good idea to glance through it.