Add valgrind makefile command

I'm not sure if it's very helpful with MPI, but at least it's there

makefile

@@ -29,3 +29,9 @@ all: $(TARGET)
 # Compile target if dependencies update. Then run.
 run: $(TARGET)
 	@$(EXE) -n $(CORES) --oversubscribe ./$(TARGET) $(ARGS)
+
+
+# Compile target if dependencies update. Then run.
+valgrind: $(TARGET)
+	@rm ./logs/*
+	@$(EXE) -n $(CORES) --oversubscribe valgrind --leak-check=full --suppressions=valgrind_supression.txt --log-file=./logs/vg.%p ./$(TARGET) $(ARGS)

valgrind_supression.txt

+{
+   ignore_unversioned_libs
+   Memcheck:Leak
+   ...
+   obj:*/lib*/lib*.so
+}
+{
+   ignore_versioned_libs
+   Memcheck:Leak
+   ...
+   obj:*/lib*/lib*.so.*
+}