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From Eric Covener <cove...@gmail.com>
Subject Re: [users@httpd] Conditionally LoadModule?
Date Tue, 15 Nov 2016 02:59:29 GMT
On Mon, Nov 14, 2016 at 9:40 PM, Jack Bates <4ecvsm@nottheoilrig.com> wrote:
> Why doesn't the following work?
>
>> <If "-f /usr/lib/apache2/modules/libphp7.0.so">
>>     LoadModule php7_module      modules/libphp7.0.so
>> </If>
>> <Else>
>>     LoadModule php5_module      modules/libphp5.so
>> </Else>
>
>
> /usr/lib/apache2/modules/libphp7.0.so exists on my system,
> but Apache keeps trying to load /usr/lib/apache2/modules/libphp5.so:
>
>> Cannot load modules/libphp5.so into server:
>> /usr/lib/apache2/modules/libphp5.so: cannot open shared object file: No such
>> file or directory


It should be syntactically rejected but probably isn't because of a bug.

LoadModule is executed while being read at startup.
<if> is evaluated during request processing, so it's obviously far too late.

I do have a patch for <IfFile> that acts like <ifDefine> (works at
startup) somewhere that would satisfy this kind of config. Otherwise,
you need to do the test -f in a startup script, then pass -DFOO to
apachectl based on the result, and use IfDefine in your config.

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