Makefile中的错误，编译多个C文件

Question

我正在尝试创建一个makefile，以便可以编译多个C文件。 此makefile不能按预期工作，并且仅在我运行make all并给出有关ex3的错误时才编译ex1（请参阅错误日志）

CFLAGS=-Wall -g


all:
    make ex1
    make ex3

clean:
    rm -f ex1
    rm -f ex3

错误：

make all
make ex1
make[1]: Entering directory '/home/daniel/ownCloud/code/Learn C the hard way/Make'
cc -Wall -g    ex1.c   -o ex1
make[1]: Leaving directory '/home/daniel/ownCloud/code/Learn C the hard way/Make'
make ex3
make[1]: Entering directory '/home/daniel/ownCloud/code/Learn C the hard way/Make'
make[1]: *** No rule to make target 'ex3'.  Stop.
make[1]: Leaving directory '/home/daniel/ownCloud/code/Learn C the hard way/Make'
Makefile:5: recipe for target 'all' failed
make: *** [all] Error 2

Answer 1

递归调用make是一个好主意。 您应该按如下所示编写makefile：

CFLAGS=-Wall -g

all: ex1 ex3

clean:
    rm -f ex1 ex3