Update Makefile and do not use graphviz for now

Signed-off-by: Rafael Ravedutti <rafaelravedutti@gmail.com>

Makefile

 .PHONY: all build clean
 
+PYCMD=python3
+CC=mpicxx
+NVCC=nvcc
+CUDA_PATH=/apps/SPACK/0.18.0/opt/linux-almalinux8-zen/gcc-8.5.0/cuda-11.6.2-mlkhyhqwqk7cyltlmvw7n4ofdui5ocup
+
 all: clean build lj_cpu lj_gpu
 	@echo "Everything was done!"
 
 build:
 	@echo "Building pairs package..."
-	python3 setup.py build && python3 setup.py install --user
+	$(PYCMD) setup.py build && $(PYCMD) setup.py install --user
 
 lj_ns.cpp:
 	@echo "Generating and compiling Lennard-Jones example for CPU..."
-	python3 examples/lj_func.py cpu
+	$(PYCMD) examples/lj_func.py cpu
 
 lj_ns.cu:
 	@echo "Generating and compiling Lennard-Jones example for GPU..."
-	python3 examples/lj_func.py gpu
+	$(PYCMD) examples/lj_func.py gpu
 
 # Targets
 lj_cpu: lj_ns.cpp
 #	g++ -o lj_cpu lj_ns.cpp -DDEBUG
-	mpic++ -O3 -o lj_cpu lj_ns.cpp runtime/pairs.cpp runtime/domain/regular_6d_stencil.cpp runtime/devices/dummy.cpp -DDEBUG
+	$(CC) -O3 -o lj_cpu lj_ns.cpp runtime/pairs.cpp runtime/domain/regular_6d_stencil.cpp runtime/devices/dummy.cpp -DDEBUG
 
 lj_gpu: lj_ns.cu
-	mpic++ -c -o pairs.o runtime/pairs.cpp -DDEBUG
-	mpic++ -c -o regular_6d_stencil.o runtime/domain/regular_6d_stencil.cpp -DDEBUG
-	nvcc -c -o cuda_runtime.o runtime/devices/cuda.cu -DDEBUG
-	nvcc -c -o lj_gpu.o lj_ns.cu -DDEBUG
-	mpic++ -o lj_gpu lj_gpu.o cuda_runtime.o pairs.o regular_6d_stencil.o -lcudart -L/usr/local/cuda/lib64
+	$(CC) -c -o pairs.o runtime/pairs.cpp -DDEBUG
+	$(CC) -c -o regular_6d_stencil.o runtime/domain/regular_6d_stencil.cpp -DDEBUG
+	$(NVCC) -c -o cuda_runtime.o runtime/devices/cuda.cu -DDEBUG
+	$(NVCC) -c -o lj_gpu.o lj_ns.cu -DDEBUG
+	$(CC) -o lj_gpu lj_gpu.o cuda_runtime.o pairs.o regular_6d_stencil.o -lcudart -L$(CUDA_PATH)/lib64
 
 clean:
 	@echo "Cleaning..."

src/pairs/sim/simulation.py

@@ -9,7 +9,7 @@ from pairs.ir.properties import Properties
 from pairs.ir.symbols import Symbol
 from pairs.ir.types import Types
 from pairs.ir.variables import Variables
-from pairs.graph.graphviz import ASTGraph
+#from pairs.graph.graphviz import ASTGraph
 from pairs.mapping.funcs import compute
 from pairs.sim.arrays import ArraysDecl
 from pairs.sim.cell_lists import CellLists, CellListsBuild, CellListsStencilBuild
@@ -284,5 +284,5 @@ class Simulation:
         # For this part on, all bin ops are generated without usage verification
         self.check_decl_usage = False
 
-        ASTGraph(self.functions, "functions").render()
+        #ASTGraph(self.functions, "functions").render()
         self.code_gen.generate_program(program)