path: dependency for files NOT in macports

[Ryan Schmidt]

On Dec 11, 2008, at 18:04, Joshua Root wrote:

> Jeremy Huddleston wrote:
>
>> On Dec 11, 2008, at 08:50, Joshua Root wrote:
>>
>>> Ryan Schmidt wrote:
>>>>
>>>> On Dec 11, 2008, at 02:18, Anders F Björklund wrote:
>>>>
>>>>> Jeremy Huddleston wrote:
>>>>>
>>>>>> Is there a way for me to do something like:
>>>>>>
>>>>>> path:lib/pkgconfig/x11.pc:xorg-libX11
>>>>>>
>>>>>> but have that dependency satisfied by /usr/X11/lib/pkgconfig/ 
>>>>>> x11.pc ?
>>>>>
>>>>> You can use "${x11prefix}/lib/pkgconfig/x11.pc",
>>>>
>>>> Actually I'm told you currently can't because variables are not  
>>>> expanded
>>>> in depspecs.
>>>>
>>>> http://trac.macports.org/ticket/17182
>>>
>>> Technically that only seems to be the case for $prefix - but  
>>> expanding
>>> $x11prefix at indexing time is wrong anyway. Yet, it may do just  
>>> what
>>> you want in this particular case.
>>
>> either way, that's still checking that it's in ${x11prefix} only and
>> doesn't let the macports one satisfy it =/
>
> The dependency is satisfied if the named port is installed, regardless
> of whether it actually provides the specified file.

So in this case you would depend on

path:/usr/X11/lib/pkgconfig/x11.pc:xorg-libX11

If /usr/X11/lib/pxkgconfig.x11.pc exists that will satisfy (would be  
the case on Leopard and later), and if not, then port xorg-libX11  
will be installed (for Tiger and earlier).

Once variables are expanded in depspecs, you could change /usr/X11 to  
${x11prefix}.