GitLab

The combination of clang++ 3.4 with libstdc++ from GCC 4.6
doesn't work.

Apparently the default is

on_success: change
on_failure: always

which seems reasonable.

Hooray for testing travis configs via pushing to master.

gcc 4.6 (the default) does have some C++11 support, but its flag is -std=c++0x. Since 4.7 was released in 2012, I think it's reasonable to require it.