Re: [Xen-devel] [PATCH] autoconf: add missing compression checks for libxc

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 06.03.12 at 16:01, Roger Pau MonnÃ<roger.pau@xxxxxxxxxxxxx> wrote:
> 2012/3/6 Jan Beulich <JBeulich@xxxxxxxx>:
>> ... are you certain that checking for these symbols in the respective
>> libraries suffices? The old check really was verifying corresponding
>> header files' presence.
> 
> I think it's best to do it this way, what this tests do is try to
> compile a sample program that uses the library, which is much more
> closer to the reality than just checking for a header existence. In a
> strange case you might have the header files, but maybe the library is
> broken, so we can not use it. What I can do if you want is check for
> the header files also, something like this?

Hmm, no - I was rather thinking of a real usability test (which implies
existence), i.e. include the header in the test source snippet. This is
what really matches reality.

Jan

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