Added build system

Makefile

@@ -0,0 +1,33 @@
+# Makefile for s2d_engine.a
+
+TARGET = s2d_engine.a
+
+BUILD_DIR ?= build
+DUMMY != mkdir -p $(BUILD_DIR)
+
+C_FILES = $(wildcard ./*.c)
+O_FILES = $(foreach file,$(C_FILES),$(BUILD_DIR)/$(file:.c=.o))
+
+CROSS := mips-linux-gnu-
+CC = $(CROSS)gcc
+AR = $(CROSS)ar
+
+INCLUDE_BASE := ../../
+I_DIRS = src include/n64/PR include/n64 include/libc include .
+FULL_I_DIRS = $(addprefix $(INCLUDE_BASE),$(I_DIRS))
+I_FLAGS = $(foreach i,$(FULL_I_DIRS),-I$(i))
+
+TARGET_CFLAGS = -nostdinc -I include/libc -DTARGET_N64 -DF3DEX_GBI_2 -DNON_MATCHING -DAVOID_UB
+CFLAGS := -Wall $(TARGET_CFLAGS) $(I_FLAGS) -march=vr4300 -mtune=vr4300 -mfix4300 -mabi=32 -mno-shared -G 0 -fno-PIC -mno-abicalls -fno-zero-initialized-in-bss -fno-toplevel-reorder -Wno-missing-braces
+
+default: all
+
+all: $(BUILD_DIR)/$(TARGET)
+
+$(BUILD_DIR)/$(TARGET): $(O_FILES)
+	$(AR) rcs -o $@ $(O_FILES)
+
+$(BUILD_DIR)/%.o: %.c
+	$(CC) -c $(CFLAGS) -o $@ $<
+
+print-% : ; $(info $* is a $(flavor $*) variable set to [$($*)]) @true