The first release candidate for the last release from the GCC 4.8 branch, GCC 4.8.5, is available from
ftp://gcc.gnu.org/pub/gcc/snapshots/4.8.5-RC-20150614 and shortly its mirrors. I have so far bootstrapped and tested the release candidate on x86_64-unknown-linux-gnu. Please test it and report any issues to bugzilla. If all goes well, I'd like to release 4.8.5 at the end of next week.