http://benji3up2kxewkqfcq7buxk2xd6zwy3zggnurkrm3l4cvwy2iipvyyad.onion/mirrors/gmpdoc/Notes-for-Particular-Systems.html
FreeBSD 7.x, 8.x, 9.x ¶ GMP releases starting with 6.0 do not support ‘ ABI=32 ’ on FreeBSD/amd64
prior to release 10.0 of the system. The cause is a broken limits.h ,
which GMP no longer works around. MS-DOS and MS Windows ¶ On an MS-DOS system DJGPP can be used to build GMP, and on an MS Windows
system Cygwin, DJGPP and MINGW can be used.