[gentoo-amd64] Status of Gcc-5.1.0?

[Frank Peters <frank.peters@comcast.net>]

What is going on with the new gcc-5.1.0?

I've read some reports that others are already using gcc-5.1.0,
yet when I try to install gcc-5.1.0 it pulled in isl-0.14 which
completely broke my current gcc-4.9.2.  As a result I could compile
nothing.  I had to temporarily install the Fedora isl-0.12.2
libraries so I could downgrade to the Gentoo version and get things
working again. 

I notice that gcc-5.1.0 has a keyword mask and isl-0.14 and
cloog-0.18.3, both of which are needed for gcc-5.1.0, are hard masked.

My plan is to leave things alone until everything becomes unmasked
but how are others able to use gcc-5.1.0?

The only way to do so would be to install isl-0.14 in a different
slot but I don't think portage will allow this.

Frank Peters