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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.lang.c
Subject: Re: Python recompile
Date: Thu, 6 Mar 2025 21:30:21 -0000 (UTC)
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On Thu, 6 Mar 2025 20:16:27 +0000, bart wrote:

> So, why doesn't the configuration script itself have a configuration
> script? Will the language used in the script run on EVERY Linux and Unix
> system?

Yes. It takes a lot of work to ensure that, including avoiding quirks and 
bugs in particular Unix systems’ shell implementations. This is all taken 
into account in the definition of the m4 macros that are actually used to 
generate all that shell script.

POSIX provides the official spec, but that isn’t entirely enough.

Luckily, the demise of nearly all proprietary Unix systems has simplified 
the picture enormously.