从 configure.ac 中的文件中读取版本号 [英] Read a version number from a file in configure.ac

问题描述

出于某些原因，我在纯文本文件而不是 configure.ac 中定义了我的项目版本号.我想创建一个语句来读取版本号并在编译时存储它.

I define my project version number in a plain text file instead of configure.ac for some reasons. I would like to create a statement that would read the version number and store it during compilation time.

现在我的 configure.ac 看起来像这样:

Right now my configure.ac looks like this:

AC_INIT([my program],[999.9.9])

我想要类似的东西:

AC_INIT([my program],[ $(cat VERSION) ])

这当然行不通.这里的诀窍是什么?(我知道我失去了一些便携性——我现在不在乎).谢谢！

This wont work of course. What is the trick here? (I know I am loosing some portability - I don't care at the moment). Thanks!

推荐答案

尝试:

AC_INIT([my program], m4_esyscmd([tr -d '
' < VERSION]))

根据评论中建议的修复进行了编辑.

Edited with fixes suggested in the comments.

我还可以使用以下方法删除不可移植的 tr 调用:

I was also able to remove the non-portable tr invocation using:

AC_INIT([my program], [m4_translit(m4_esyscmd([cat VERSION]),m4_newline)])

这似乎同样有效，Enrico 在下面的评论中建议的解决方案也是如此:

which seems to work just as well, as does the solution suggested by Enrico in the comments below:

AC_INIT([my program], [m4_esyscmd_s([cat VERSION])])

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