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Message-ID: <53CC4132.9030508@marino.st>
Date: Mon, 21 Jul 2014 00:22:42 +0200
From: John Marino <freebsd.contact@marino.st>
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To: Baptiste Daroussin <bapt@FreeBSD.org>, marino@freebsd.org
Subject: Re: svn commit: r362304 - head/x11-toolkits/pango
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On 7/21/2014 00:18, Baptiste Daroussin wrote:
> On Mon, Jul 21, 2014 at 12:12:08AM +0200, John Marino wrote:
>> Don't bother with headers.
>>
>>> readelf -d /usr/local/lib/libpango-1.0.so
>>
>> libm is listed as a required shared library, plain as day.
>> for non-explicit linking the linker will pick all those up.  For
>> explicit linking, they have to be passed to the linker.
> 
> Anything linking to libpango will not have to link with libm because of that,
> that just mean that libpango itself needs to load the libm.so when being loaded
> 
> final binary linking to libpango only needs explicit link to libm only if pango
> headers make the binary to use directly libm symbols which is not the case here.
> 

yes it is the case here.
It uses ceil or floor or sqrt or some other common math function.

All this change did is add a configure argument.  How the .pc get built
is done by the pango configure & makefile.  It's not a dragonfly thing.
 If pango pc gets -lm due to this configure argument, it's because pango
knows that it's needed when explicit linking is required.

Right?

John