makefile执行出错的问题

我在AIX下测试make编译一个小程序：

makefile文件：

    edit: main.o \
            cc -o main.o
    main.o: main.c \
            cc -c main.c
    clean: \
            rm edit main.o
程序cc编译通过，但是在make编译下显示出错，如下：

personal>make
"makefile", line 2: make: 1254-056 Shell command not associated with a dependency: edit: main.o  cc -o .
"makefile", line 4: make: 1254-056 Shell command not associated with a dependency: main.o: main.c  cc -.
"makefile", line 6: make: 1254-056 Shell command not associated with a dependency: clean:  rm edit main.
make: 1254-058 Fatal errors encountered -- cannot continue.