The first release candidate for GCC 5.5 is available from ftp://gcc.gnu.org/pub/gcc/snapshots/5.5.0-RC-20171002
and shortly its mirrors. It has been generated from SVN revision 253367. I have so far bootstrapped and tested the release candidate on x86_64-linux and i686-linux. Please test it and report any issues to bugzilla. If all goes well, I'd like to release 5.5 on Monday, October 9th.
