makefile refactor

Makefile

+SRC_DIR = src
+BIN_DIR = bin
+BUILD_DIR = build
+CPP_FILES = \
+	$(SRC_DIR)/context.cpp \
+	$(SRC_DIR)/functions.cpp \
+	$(SRC_DIR)/document.cpp \
+	$(SRC_DIR)/document_parser.cpp \
+	$(SRC_DIR)/eval_apply.cpp \
+	$(SRC_DIR)/node.cpp \
+	$(SRC_DIR)/node_comparisons.cpp \
+	$(SRC_DIR)/values.cpp \
+	$(SRC_DIR)/prelexer.cpp
+
+sasscpp: $(SRC_DIR)/sasscpp.cpp $(CPP_FILES)
+	g++ -o $(BIN_DIR)/sasscpp $(SRC_DIR)/sasscpp.cpp $(CPP_FILES)
+
+sassc: sassc_obj libsass
+	gcc -o $(BIN_DIR)/sassc $(BUILD_DIR)/sassc.o libsass.a -lstdc++
+
+sassc_obj: $(SRC_DIR)/sassc.c
+	gcc -c $(SRC_DIR)/sassc.c
+	mv $(SRC_DIR)/*.o $(BUILD_DIR)/.
+
+libsass: libsass_objs
+	ar rvs libsass.a \
+			$(BUILD_DIR)/sass_interface.o \
+			$(BUILD_DIR)/context.o \
+			$(BUILD_DIR)/functions.o \
+			$(BUILD_DIR)/document.o \
+			$(BUILD_DIR)/document_parser.o \
+			$(BUILD_DIR)/eval_apply.o \
+			$(BUILD_DIR)/node.o \
+			$(BUILD_DIR)/node_comparisons.o \
+			$(BUILD_DIR)/values.o \
+			$(BUILD_DIR)/prelexer.o
+
+libsass_objs: build_dir $(SRC_DIR)/sass_interface.cpp $(CPP_FILES)
+	g++ -c -combine $(SRC_DIR)/sass_interface.cpp $(CPP_FILES)
+	mv *.o $(BUILD_DIR)/
+
+test: sassc
+	ruby spec.rb spec/basic/
+
+test_all: sassc
+	ruby spec.rb spec/
+
+build_dir:
+	mkdir -p $(BUILD_DIR)
+
+clean:
+	rm -rf *.o build/*.o *.a
+	rm -rf bin/*
\ No newline at end of file

src/Makefile

-
-
-sasscpp: sasscpp.cpp context.cpp functions.cpp document.cpp document_parser.cpp eval_apply.cpp node.cpp node_comparisons.cpp values.cpp prelexer.cpp
-	g++ -o bin/sasscpp sasscpp.cpp context.cpp functions.cpp document.cpp document_parser.cpp eval_apply.cpp node.cpp node_comparisons.cpp values.cpp prelexer.cpp
-
-sassc: sassc.o libsass
-	gcc -o bin/sassc sassc.o libsass.a -lstdc++
-
-sassc_obj: sassc.c
-	gcc -c sassc.c
-
-libsass: sass_interface.o context.o functions.o document.o document_parser.o eval_apply.o node.o node_comparisons.o values.o prelexer.o
-	ar rvs libsass.a sass_interface.o context.o functions.o document.o document_parser.o eval_apply.o node.o node_comparisons.o values.o prelexer.o
-
-libsass_objs: sass_interface.cpp context.cpp functions.cpp document.cpp document_parser.cpp eval_apply.cpp node.cpp node_comparisons.cpp values.cpp prelexer.cpp
-	g++ -c sass_interface.cpp context.cpp functions.cpp document.cpp document_parser.cpp eval_apply.cpp node.cpp node_comparisons.cpp values.cpp prelexer.cpp
-
-test: sassc
-	ruby spec.rb spec/basic/
-
-test_all: sassc
-	ruby spec.rb spec/
-
-clean:
-	rm -rf *.o
-	rm -rf *.a
-	rm -rf bin/*
\ No newline at end of file