Linux command
m4 命令
文本
复制后可按需替换文件名、目录或参数。
常用示例
Process file
m4 [input.m4]
Output to file
m4 [input.m4] > [output.txt]
Define macro
m4 -D [NAME=value] [input.m4]
Include directory
m4 -I [/path/to/includes] [input.m4]
Prefix builtins
m4 -P [input.m4]
Debug output
m4 -d [input.m4]
说明
m4 is a macro processor. It expands macros in text files to generate output. The tool is used to preprocess configuration files and source code. It's part of autoconf.
参数
- -D _NAME=VALUE_
- Define macro.
- -U _NAME_
- Undefine macro.
- -I _DIR_
- Add include path.
- -P
- Prefix builtins with m4_.
- -d
- Enable debug output.
- --help
- Display help information.
FAQ
What is the m4 command used for?
m4 is a macro processor. It expands macros in text files to generate output. The tool is used to preprocess configuration files and source code. It's part of autoconf.
How do I run a basic m4 example?
Run `m4 [input.m4]` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
What does -D _NAME=VALUE_ do in m4?
Define macro.