patches/packages/gcc-4.8.4-arm-1_slack14.1.txz
In October 2014, the ARM Kernel developers blacklisted GCC versions 4.8.0
up to GCC 4.8.2 (inclusive) because those versions were building kernels that
were corrupting file systems. See this post for more details:
http://article.gmane.org/gmane.linux.ports.arm.omap/119412
You'll need to upgrade to these GCC packages if you want to build
Linux version 3.18 or higher.
Thanks to dowelld for the report.

patches/packages/gcc-g++-4.8.4-arm-1_slack14.1.txz

patches/packages/gcc-gfortran-4.8.4-arm-1_slack14.1.txz

patches/packages/gcc-gnat-4.8.4-arm-1_slack14.1.txz

patches/packages/gcc-go-4.8.4-arm-1_slack14.1.txz

patches/packages/gcc-java-4.8.4-arm-1_slack14.1.txz

patches/packages/gcc-objc-4.8.4-arm-1_slack14.1.txz