makefiles - 干净的目标

发布于 2024-11-17 00:57:34 字数 362 浏览 6 评论 0原文

谁能告诉我如何执行 makefile 中写入的 clean 目标。这是我的代码

jamm : hello.o ghola.o
    gcc $^ -o $@

%.o : %.c
    gcc -c S<

clean :  
    rm *.c

，我有一些问题。如何使用 clean 作为目标来清理所有这些 c 文件。我们给出命令 make -f file1（假设文件名是 file1），它会将目标视为 jamm 并执行，但它不会执行 clean 目标。如果在命令行中我说 make clean 它说没有这样的文件或目录，我是无法理解这个概念，任何人都可以告诉我当我在 make 文件中写入时如何执行这些干净的操作。请大家帮忙

原文

can anyone tell me how to execute the clean target which is written in the makefile.
here is my code

jamm : hello.o ghola.o
    gcc $^ -o $@

%.o : %.c
    gcc -c S<

clean :  
    rm *.c

i have some questions.how to clean all those c files using the clean as target. we give the command make -f file1(say filename is file1) and it sees the target as jamm and execute but it wont execute the clean target.If in the command line i say make clean it says no such file or directory i'm unable to get this concept can anyone please tell me how to execute these clean when i have written in my make file.please guyss

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我爱人 2024-11-24 00:57:34

检查您的目录中是否有名为“clean”的文件。
您的 make 调用可能认为它必须以某种方式生成一个“干净”的文件。

要解决此问题，请尝试在干净目标之前添加 .PHONY指标：

jamm : hello.o ghola.o
    gcc $^ -o $@

%.o : %.c
    gcc -c S<

# add this:
.PHONY: clean

clean :  
    rm *.c

顺便说一下：你的干净目标看起来很糟糕：你不应该删除.o文件而不是.c吗？？？

Check in your directory if you have a file named "clean".
It might be that your make call thinks it must generate a "clean" file somehow.

To fix this, try to add just before your clean target a .PHONY indicator:

jamm : hello.o ghola.o
    gcc $^ -o $@

%.o : %.c
    gcc -c S<

# add this:
.PHONY: clean

clean :  
    rm *.c

BY THE WAY: YOUR CLEAN TARGET LOOKS BAD: shouldn't you delete the .o files instead of the .c ????

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离笑几人歌 2024-11-24 00:57:34

在我的一个 makefile 中，clean 目标如下所示：

.PHONY: depend clean all new

clean:
    rm *.o *~ $(PROGS) ~/include/*.gch

请注意，包含可执行语句的行以制表符开头。

其他一些事情：

您可能不想 rm 您的 .c 文件。这些是您的源文件，您可能会丢失对它们进行编码的所有工作。
您想要删除的是您的对象（在我的示例中为 .o）和可执行文件（在我的示例中为 $(PROGS)，实际上是包含对象名称的任何变量可执行文件）文件和预编译头文件（.gch），因此您可以从头开始重新制作。
实际上不会生成该名称文件的目标（例如 clean）应列为 .PHONY 的先决条件。这让 make 知道即使有一个名为 clean 的文件，它也应该运行该命令。
要执行特定目标（例如clean），只需输入
```
清理干净
```
但请确保：
- 您与 makefile 位于同一目录
- 您的 makefile 需要命名为 Makefile 或 makefile。如果您使用的是 GNU make，您也可以将其命名为 GNUmakefile

In one of my makefiles, the clean target looks like this:

.PHONY: depend clean all new

clean:
    rm *.o *~ $(PROGS) ~/include/*.gch

Note that the line with the executable statement begins with a tab.

Some other things:

You probably don't want to rm your .c files. Those are your source files, and you could lose all your work coding them.
What you do want to remove are your object (.o in my example) and executable ($(PROGS) in my example, really any variable that contains the names of the executables) files, and precompiled headers (.gch), so you can remake from a clean slate.
Targets that don't actually produce a file by that name, like clean, should be listed as prerequisites of .PHONY. This lets make know that even if there is a file called clean, it should run the command anyway.
To execute a particular target (clean for example), just enter
```
make clean
```
but make sure that:
- You are in the same directory as your makefile
- Your makefile needs to be named Makefile or makefile. If you are using GNU make, you can also call it GNUmakefile