On Tue, Jan 7, 2020 at 1:38 PM Richard Biener <richard.guent...@gmail.com> wrote: > > On Sun, Jan 5, 2020 at 9:28 PM Bruno Haible <br...@clisp.org> wrote: > > > > Hi, > > > > The minimum support library version of MPC for building GCC 10 is not > > correct. > > > > After downloading gcc-10-20191229.tar.xz and > > $ cd gcc-10-20191229/gcc/doc > > $ ./install.texi2html > > $ xdg-open HTML/prerequisites.html > > I installed > > - gmp 4.3.2 - works, > > - mpfr 3.1.0 - works, > > - mpc 0.8.1 - fails! > > > > The failure has been reported already in [1]. The fix is to use > > > > - mpc 1.0.3 - works. > > Indeed. I checked 0.8.2 and it doesn't work, I checked 1.0.1 and that does > so I adjusted it to 1.0.1 or later.
Note that in-tree builds are only supported for exactly the versions that ./download_prerequesites download but the minimal documented versions are those that are known to work when the library is compiled and installed separately. Richard. > Richard. > > > This wastes some time for everyone who attempts to install GCC 10 from > > scratch. > > > > In [2] it was suggested to look in the contrib/download_prerequisites > > script. > > This script indeed contains > > > > mpc='mpc-1.0.3.tar.gz' > > > > Additionally, the mpc-0.8.1 release is so old that it is not (or no longer) > > on ftp.gnu.org [3]. > > > > Therefore I would suggest > > 1) to change the documentation (HTML/prerequisites.html) in the GCC 10 > > snapshots to mention mpc-1.0.3 instead of mpc-0.8.1, > > 2) likewise, change https://gcc.gnu.org/install/prerequisites.html > > to mention mpc-1.0.3 instead of mpc-0.8.1. > > > > Bruno > > > > [1] https://gcc.gnu.org/ml/gcc/2017-05/msg00022.html > > [2] https://gcc.gnu.org/ml/gcc/2017-05/msg00024.html > > [3] https://ftp.gnu.org/gnu/mpc/ > >
