[Interest] Qt5 cannot be build on Debian Wheezy? GLIBCXX_3.4.20' not found

[Guido Seifert]

Hiya, is it possible that Qt5 cannot be build on the latest stable Debian? Wheezy?
I get:

	/usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required
	by ....qt5/qtwebengine/src/3rdparty/ninja/ninja)

According to uncle google GLIBCXX_3.4.20 is gcc 4.9, which does not exist under Wheezy.
Somehow I cannot believe this. Debian's stable are usually ancient, but also very popular.

Guido