Undeclared symbols: QFe and Qff

[cdoucet]

I try to compile sources with cmake and I get the following error message.
Is it obvious for someone before I try to solve it?

In file included from /usr/include/c++/5/cassert:43:0,
from /home/cdoucet/Depots/github/FreeFem-sources/src/femlib/GenericMesh.hpp:40,
from /home/cdoucet/Depots/github/FreeFem-sources/src/femlib/Mesh3dn.hpp:48,
from /home/cdoucet/Depots/github/FreeFem-sources/src/femlib/FESpacen.hpp:54,
from /home/cdoucet/Depots/github/FreeFem-sources/src/fflib/ff++.hpp:29,
from /home/cdoucet/Depots/github/FreeFem-sources/examples++-load/Element_Mixte3d.cpp:36:
/home/cdoucet/Depots/github/FreeFem-sources/examples++-load/Element_Mixte3d.cpp: In constructor ‘Fem2D::TypeOfFE_RT1_3d::TypeOfFE_RT1_3d()’:
/home/cdoucet/Depots/github/FreeFem-sources/examples++-load/Element_Mixte3d.cpp:2277:10: error: ‘QFe’ was not declared in this scope
assert(QFe.n);
^
/home/cdoucet/Depots/github/FreeFem-sources/examples++-load/Element_Mixte3d.cpp:2278:10: error: ‘QFf’ was not declared in this scope
assert(QFf.n);