未定义的主要参考

Question

使用makefile编译c ++程序时出现意外错误

我收到以下错误：

ishant@russell:~/CSD/cache$ make
make: Warning: File `makefile' has modification time 1.6e+03 s in the future
\g++ -o naivea.out naive.cpp mycache.cpp mylru.cpp myblock.cpp
/usr/lib/gcc/i486-linux-gnu/4.4.5/../../../../lib/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
collect2: ld returned 1 exit status
make: *** [naive] Error 1

我的makefile：

CC = \g++
CFLAGS = -W -Wall
COMMON = mycache.cpp mylru.cpp myblock.cpp
NAIVE = results/naive/
AWARE = results/aware/

all : naive aware 

naive : naive.cpp $(COMMON)
    $(CC) -o $(NAIVE)a.out $^

aware : cacheaware.cpp $(COMMON)
    $(CC) -o $(AWARE)a.out $^ -lm

mycache.cpp，mylru.cpp和myblock.cpp分别对类cache，lru和block中的方法有定义。虽然cacheaware.cpp和naive.cpp具有矩阵乘法代码以及main（）函数