Hello, This enhancement is based on YP#7581 in regards to consider gcc 5.x as default for YP1.9
http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=3d81a56912fb2c6ca1c5aafb93cbc6e2cfea20b3
verified on master: ea562de57590c966cd5a75fda8defecd397e6436 tcmode-default.inc:GCCVERSION ?= "5.%"