rhel 7, where is libstdc++.so.5?

I'm getting an error from vendor firmware updater on rhel7:

./arcconf: error while loading shared libraries: libstdc++.so.5: cannot open shared object file: No such file or directory

I believe this used to be compat-libstdc++ but I can't find it with yum... Anyone know where it's gone or how to use the vendor program?