diff --git a/examples/common.mk b/examples/common.mk
index db7b8eee..252c1196 100644
--- a/examples/common.mk
+++ b/examples/common.mk
@@ -1,11 +1,11 @@
 
-TASK_CXX=../tasksys.cpp
+TASK_CXX=../tasksys3d.cpp
 TASK_LIB=-lpthread
-TASK_OBJ=objs/tasksys.o
+TASK_OBJ=objs/tasksys3d.o
 
-CXX=clang++
+CXX=g++ -fopenmp
 CXXFLAGS+=-Iobjs/ -O2
-CC=clang
+CC=gcc -fopenmp
 CCFLAGS+=-Iobjs/ -O2
 
 LIBS=-lm $(TASK_LIB) -lstdc++
diff --git a/examples/tasksys.cpp b/examples/tasksys.cpp
index c9c2fa7b..d7b524a8 100644
--- a/examples/tasksys.cpp
+++ b/examples/tasksys.cpp
@@ -59,7 +59,9 @@
 #define ISPC_USE_PTHREADS
 #define ISPC_USE_PTHREADS_FULLY_SUBSCRIBED
 #define ISPC_USE_CILK
+*/
 #define ISPC_USE_OMP
+/*
 #define ISPC_USE_TBB_TASK_GROUP
 #define ISPC_USE_TBB_PARALLEL_FOR