[ 12%] Building CXX object Source/ThirdParty/StanHull/CMakeFiles/StanHull.dir/hull.cpp.o
/home/romain/Projects/Urho3D/Source/ThirdParty/StanHull/hull.cpp:2590:28: error: cannot initialize return object of type 'int' with an rvalue of type 'nullptr_t'
if(verts_count <4) return NULL;
^~~~
/usr/include/sys/_null.h:37:14: note: expanded from macro 'NULL'
#define NULL nullptr
^~~~~~~
1 error generated.