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Re: Conditional AC_CHECK_HEADER

From: Russ Allbery
Subject: Re: Conditional AC_CHECK_HEADER
Date: Sat, 04 Feb 2023 09:26:48 -0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux)

Florian Weimer <> writes:

> I want to submit this upstream.  Is there are some explanation somewhere
> why it's not permitted to invoke AC_CHECK_HEADER under shell conditional
> statement?  I couldn't find it in the manual.

It's documented under AS_IF:

The principle that one should always use an AS_* construct if one exists
rather than regular shell constructs could probably be documented more

Russ Allbery (             <>

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