Added Makefile

Makefile

@@ -1,36 +1,65 @@
+CC = gcc
+INCLUDE_DIR = ./include
+SOURCE_DIR = ./src
+CFLAGS += -I$(INCLUDE_DIR) -ansi -std=c99
+LIBS += -lgsl -lopenblas -lm
 # Debug flags and release flags for GCC
-ifeq ($(BUILD),debug)   
-CFLAGS += -O0 -g
-BUILD_DIR = build/debug
-else
+ifeq ($(BUILD),release)
 CFLAGS += -O2 -s -DNDEBUG
-BUILD_DIR = build/release
+_BUILD_DIR = ./build/release
+_OBJECT_DIR = ./obj/release
+else
+CFLAGS += -O0 -g
+_BUILD_DIR = ./build/debug
+_OBJECT_DIR = ./obj/debug
 endif
 
+# Check for required directories for GCC outputs
+ifeq ($(wildcard $(OBJECT_DIR)/.),)
+$(shell mkdir -p $(OBJECT_DIR))
+endif
+
+# Valgrind specific flags for debugging help
+VALGRIND_ARGS += -s --leak-check=full --track-origins=yes \
+								 --show-leak-kinds=all
+
 # Get the system architecture if not specified
 ifeq ($(ARCH),)
-	ARCH = $(shell uname -m)
+ARCH = $(shell uname -m)
+BUILD_DIR = $(addsuffix $(ARCH), $(_BUILD_DIR)/)
+OBJECT_DIR = $(addsuffix $(ARCH), $(_OBJECT_DIR)/)
 endif
 
-VALGRIND_ARGS += --leak-check=full --track-origins=yes --show-leak-kinds=all
+# Create directories if they don't exist
+ifeq ($(wildcard $(BUILD_DIR)/.),)
+$(shell mkdir -p $(BUILD_DIR))
+endif
+ifeq ($(wildcard $(OBJECT_DIR)/.),)
+$(shell mkdir -p $(OBJECT_DIR))
+endif
+
+# Binary name for executable to compile
 BINARY_NAME = demo
+# Source list files
+SRC = kernels solve gp demo
+OBJ = $(patsubst %,$(OBJECT_DIR)/%.o,$(SRC))
 
-$(BUILD_DIR)/$(ARCH)/$(BINARY_NAME): obj/kernels.o obj/solve.o obj/gp.o obj/main.o
-	gcc -std=c99 $(CFLAGS) obj/kernels.o obj/gp.o obj/solve.o obj/main.o\
-		-lgsl -lopenblas -lm -o $(BUILD_DIR)/$(ARCH)/$(BINARY_NAME).$(ARCH)
-obj/$(BINARY_NAME).o: $(BINARY_NAME).c
-	gcc -Wall -c main.c -o obj/main.o
-obj/kernels.o: src/kernels.c
-	gcc -Wall -c src/kernels.c -o obj/kernels.o
-obj/solve.o: src/solve.c
-	gcc -Wall -c src/solve.c -o obj/solve.o
-obj/gp.o: src/gp.c
-	gcc -Wall -c src/gp.c -o obj/gp.o
 
-.PHONY : debug
-debug:
-	$(MAKE) "BUILD=debug" && valgrind $(VALGRIND_ARGS) build/debug/main.x86_64
+
+$(OBJECT_DIR)/%.o: $(SOURCE_DIR)/%.c
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+$(BUILD_DIR)/$(BINARY_NAME).$(ARCH): $(OBJ)
+	gcc -std=c99 $(CFLAGS) $(OBJ) $(LIBS) -o $(BUILD_DIR)/$(BINARY_NAME).$(ARCH)
+
+.PHONY : release
+release:
+	$(MAKE) "BUILD=release"
 
 .PHONY : clean
 clean:
-	rm obj/*.o
+	rm -rf $(OBJECT_DIR)/*.o build
+
+.PHONY : valgrind
+valgrind:
+	valgrind $(VALGRIND_ARGS) $(BUILD_DIR)/$(BINARY_NAME).$(ARCH)