On 2015.09.10 at 05:36 +0000, Michael Mishourovsky wrote: > Dear Sirs, following your suggestions I checked again https://gcc.gnu.org/wiki/InstallingGCC. > > Key point was here: https://gcc.gnu.org/install/download.html (last > passage) "Likewise the GMP, MPFR and MPC libraries can be > automatically built together with GCC. Unpack the GMP, MPFR and/or MPC > source distributions in the directory containing the GCC sources and > rename their directories to gmp, mpfr and mpc, respectively (or use > symbolic links with the same name)." > > Actually my assumption was that if I run download_prerequisites from > /contrib, it will download everything and put it at right places; but > actually it does not follow statement above (it does not create gmp, > mpfr and mpc folder in main gcc package directory) So I did it > manually and copied files there. Well, https://gcc.gnu.org/wiki/InstallingGCC says: »Alternatively, after extracting the GCC source archive, simply run the ./contrib/download_prerequisites script in the GCC source directory.« The »in the GCC source directory« part is important. If you run it from anywhere else it will not work. -- Markus