https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67728
--- Comment #9 from Bernd Edlinger <bernd.edlinger at hotmail dot de> --- (In reply to Andrew Roberts from comment #8) > The initial bug report was for cross compiling. Bug 70211 is for native > builds on ARM. Given the huge growth in ARM development boards, this needs > at least documenting. As with the original reporter I spent ages trying to > figure this out before stumbling across a solution (and the solution isn't > to build GMP out of tree either). Building GMP out of tree creates another > can of worms (esp on multiarch machines). > > Any documentation fix should mention the targets that need the change (ARM), > and that both cross and native builds are affected. Also reference the > undefined symbol __gmpn_invert_limb so people know they have run across it. > > Once you do the above it sort of becomes obvious that actually building GMP > intree with the correct CPU instead of none is proper solution. Or does that > not work for cross compilies? > > The easier it is for people to build gcc themselves the more testing > prelease versions will get. what happens if you use the versions from download_prerequisites? gmp -> ../gmp-4.3.2 mpc -> ../mpc-0.8.1 mpfr -> ../mpfr-2.4.2
