Re: [gentoo-dev] Gcc 6 and Gcc 5 update

[Benda Xu]

Hi,

"Walter Dnes" <waltdnes@××××××××.org> writes:

>   Are the gmp, mpc, mpfr, and isl libs included? According to the
> "Support libraries" section at https://gcc.gnu.org/wiki/InstallingGCC

They are managed by their own ebuilds.

>> Alternatively, after extracting the GCC source archive, simply
>> run the ./contrib/download_prerequisites script in the GCC source
>> directory.  That will download the support libraries and create
>> symlinks, causing them to be built automatically as part of the GCC
>> build process. Set GRAPHITE_LOOP_OPT=no in the script if you want
>> to build GCC without ISL, which is only needed for the optional
>> Graphite loop optimizations.
>
>   That approach guarantees that the appropriate library versions are
> available for the version of GCC that you're building.

Bundled libraries are discouraged in Gentoo, because you cannot reuse
the libraries for other packages and it is not transparent to fix
security bugs.

Benda