I dont know what was the reason to comment-out this before, but now it seems to work

2ec4a036 · Luka Stanisic · 11182223 · 2ec4a036
Commit 2ec4a036 authored Mar 08, 2017 by Luka Stanisic
--- a/Src/GroupTree/StarPUUtils/FStarPUCpuWrapper.hpp
+++ b/Src/GroupTree/StarPUUtils/FStarPUCpuWrapper.hpp
@@ -28,7 +28,7 @@

 #if defined(STARPU_USE_MPI) && defined(SCALFMM_USE_MPI)
 //extern "C"{
-//#include <starpu_mpi.h>
+#include <starpu_mpi.h>
 //}
 #endif