Re: [Haskell-cafe] building ghc-8.4.2 from source: undefined reference to 'mpz_powm_sec'

Hi

You can start by checking whether you have libgmp

ah yes, I was missing the "gmp-static" package (on Fedora) so the compilation picked up some other gmp version installed someplace else. (Worse, since I had "gmp-devel", I think it picked the .so from one place, and .a from another.) Thanks, and sorry for the noise. - J.W.