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Re: Conditional AC_CHECK_HEADER

From: Paul Eggert
Subject: Re: Conditional AC_CHECK_HEADER
Date: Sun, 5 Feb 2023 21:58:23 -0800
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.2

On 2023-02-04 05:42, Florian Weimer wrote:
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.

The restriction is documented here:

(look under AS_IF) and here:

Admittedly the doc could be clearer.

It's widely understood to be a misfeature, but it's gonna be hard to fix.

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