When trying to emerge kde-base/kig-4.13.0 using x86_64-pc-linux-gnu-4.6.4 as the current compiler profile, the build fails with the message:
cc1plus: error: unrecognized command line option '-std=c++11'
Switching to x86_64-pc-linux-gnu-4.8.2 solves the problem.
Created attachment 375418 [details]
Thanks for reporting. This is fixed in cvs now. Please sync in some hours to get the changes.
+ 10 Aug 2014; Johannes Huber <firstname.lastname@example.org> kde4-base.eclass:
+ Raise gcc minimum version to 4.7, bugs #462550, #471770, #508324.