我正在通过一个例如 pgm 创建一个制作文件。
Http://mrbook.org/tutorials/make/
我的文件夹 eg _ make _ create 包含以下文件,
desktop:~/eg_make_creation$ ls
factorial.c functions.h hello hello.c main.c Makefile
# I am a comment, and I want to say that the variable CC will be
# the compiler to use.
CC=gcc
# Hwy!, I am comment no.2. I want to say that CFLAGS will be the
#options I'll pass to the compiler
CFLAGS=-c -Wall
all:hello
hello:main.o factorial.o hello.o
$(CC) main.o factorial.o hello.o -o hello
main.o:main.c
$(CC) $(CFLAGS) main.c
factorial.o:factorial.c
$(CC) $(CFLAGS) factorial.c
hello.o:hello.c
$(CC) $(CFLAGS) hello.c
clean:
rm -rf *o hello
错误:
desktop:~/eg_make_creation$ make all
make: Nothing to be done for `all'.
请帮助我理解编译这个程序。