[Bug c++/58592] -flto -fwhole-program caused undefined reference in g++ 4.7.3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58592

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
try removing -fwhole-program and add -fuse-linker-plugin

Note that it's unlikely we that somebody works on this for 4.7, which means
you may want to try GCC 4.8.1 or later.