basic tests

makefile

@@ -5,7 +5,7 @@ FLEX = flex
 
 TARGET = build/py2rb
 
-$(TARGET): build/parser.o build/lexer.o build/main.o 
+$(TARGET): build/parser.o build/lexer.o build/main.o
 	$(CXX) $^ -o $@
 
 build/parser.cpp build/parser.hpp: src/parser.y | build
@@ -17,11 +17,13 @@ build/lexer.cpp build/lexer.hpp: src/lexer.l build/parser.hpp src/scanner.hpp sr
 build/%.o: build/%.cpp
 	$(CXX) -c $(ARGS) $< -o $@
 
-build/%.o: src/%.cpp | build
-	$(CXX) -c $(ARGS) $< -o $@
+build/main.o: src/main.cpp build src/codegen.hpp
+	$(CXX) -c $(ARGS) src/main.cpp -o build/main.o
 
 src/ast.hpp: src/ast/base.hpp src/ast/expressions.hpp src/ast/literals.hpp src/ast/operators.hpp src/ast/statements.hpp src/ast/string_utils.hpp
 
+src/codegen.hpp : src/ast.hpp
+
 build:
 	mkdir -p build
 
@@ -34,4 +36,4 @@ run: $(TARGET)
 test: $(TARGET)
 	test/tester.sh
 
-.PHONY: clean run test 
+.PHONY: clean run test