makefile - 隐式 Makefile 目标

Question

http://www.cprogramming.com/tutorial/makefiles_continued.html解释隐式目标:

There are some actions that are nearly ubiquitous: for instance, you might have a collection of .c files that you may wish to execute the same command for. Ideally, the name of the file would be the target; using the implicit target ".c" you can specify a command to execute for any target that corresponds to the name of a .c file (minus the .c extension).

但是，当我尝试时，隐式目标被简单地忽略了。我的测试makefile如下:

Default: Foo.bar
    echo "In default."

.bar:
    echo "In .bar."

make: *** No rule to make target `Foo.bar', needed by `Default'.  Stop.

我错过了什么？

Answer 1

尝试:

default: foo.bar
    echo "In default."

%.bar:
    echo "In .bar."

您可能会询问旧式后缀规则 - 例如这个规则:

.c.o:
    cc -c $<

告诉 make 如何从 .c 源构建 .o 文件。带有 '%' 的形式被称为模式规则，更“现代”。我建议你阅读 GNU Make manual ，这是关于此类内容的非常有用的信息，并且易于阅读。