2019年1月4日 · GNU M4 is being actively developed, and version 2.0 will have many new features, such as better input control, multiple precision arithmetic and loadable modules.

符合 POSIX 标准的 m4，可将缓存空间划分为 10 种级别，编号依次为 0, 1, 2, ..., 9。 GNU m4 对缓存空间的级别数量不作限制。 m4 默认在 0 号缓存中工作，它在这个缓存对文本进行处理，然后将其发送到输出流。 使用 m4 内建的宏 divert，可以从当前缓存切换到其他缓存。

m4 is a general-purpose macro processor included in most Unix-like operating systems, and is a component of the POSIX standard. The language was designed by Brian Kernighan and Dennis Ritchie for the original versions of UNIX. It is an extension of an earlier macro processor, m3, written by Ritchie for an unknown AP-3 minicomputer. [1]

GNU M4是传统UNIX宏处理器的一种实现方式，它还具有一些内置功能，包括文件，shell，运算等。 作为一个宏处理器，将输入复制到扩展的输出，它要么内置，要么用户定义，且可以接受参数。

GNU m4 為 m4 巨集前處理器的 GNU 版本。 其目的是為了避免傳統m4前處理器中的多種限制，諸如對行長度的最大值限制，巨集大小的最大值限制，巨集數量的限制等。

2015年12月6日 · 符合 POSIX 标准的 m4，可将缓存空间划分为 10 种级别，编号依次为 0, 1, 2, ..., 9。 GNU m4 对缓存空间的级别数量不作限制。 m4 默认在 0 号缓存中工作，它在这个缓存对文本进行处理，然后将其发送到输出流。 使用 m4 内建的宏 divert，可以从当前缓存切换到其他缓存。

This first chapter explains what GNU m4 is, where m4 comes from, how to read and use this documentation, how to call the m4 program, and how to report bugs about it.

GNU M4 is an implementation of the traditional Unix macro processor. It is mostly SVR4 compatible although it has some extensions (for example, handling more than 9 positional parameters to macros). GNU M4 also has built-in functions for including files, running shell commands, doing arithmetic, etc.

2021年5月29日 · GNU M4 - GNU macro processor Free Software Foundation last updated May 29, 2021 This manual (m4) is available in the following formats: HTML (532K bytes) - entirely on one web page. HTML - with one web page per node. HTML compressed (116K gzipped characters) - entirely on one web page.

2024年10月13日 · GNU M4 is an implementation of the traditional Unix macro processor. It is mostly SVR4 compatible although it has some extensions (for example, handling more than 9 positional parameters to macros). GNU M4 also has built-in functions for including files, running shell commands, doing arithmetic, etc.