As you known there are three toolchain branches: toolchains-1.1.x, toolchains-1.2.x, and toolchains-1.3.x. The first branch toolchains-1.1.x collects code for building toolchains based on GCC5, the second branch toolchains-1.2.x supports toolchains based on GCC6, and third toolchains-1.3.x branch created for building toolchains based on GCC7.
Now we released toolchains with latest GNU Libc 2.26. As you known GCC 6.4.0 and GCC 7.1.0 are not ready for glibc-2.26 and required patches already applied on corresponded branches.
You can find toolchains versions 1.2.1 and 1.3.1 on our FTP Server.
Corresponded tags have been created at tags directory.