init commit

Makefile

@@ -0,0 +1,40 @@
+CC       ?= gcc
+AR       ?= ar
+RANLIB   ?= ranlib
+CFLAGS   ?= -Os -fno-builtin -ffreestanding -nostdinc
+LDFLAGS  ?= -nostdlib -static
+
+-include config.mak
+ARCH     ?= x86_64
+
+CFLAGS   += -I. -I include
+
+SRC_DIRS  = src/string src/stdio src/stdlib src/internal
+OBJ_DIR   = obj
+LIB_DIR   = lib
+
+SRCS := $(shell find $(SRC_DIRS) -name '*.c' 2>/dev/null)
+OBJS := $(SRCS:%=$(OBJ_DIR)/%.o)
+CRT_OBJ := crt/crt1.o
+
+.PHONY: all clean distclean
+
+all: $(LIB_DIR)/libc.a $(CRT_OBJ)
+
+$(OBJ_DIR)/%.c.o: %.c
+	@mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+$(LIB_DIR)/libc.a: $(OBJS)
+	@mkdir -p $(LIB_DIR)
+	$(AR) crs $@ $^
+	$(RANLIB) $@
+
+crt/crt1.o: crt/crt1.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -rf $(OBJ_DIR) $(LIB_DIR)
+
+distclean: clean
+	rm -f config.mak