port configuration data [was re: firefox & png]

[david coder]

+++ david coder [23/08/12 12:26 -0400]:
> +++ Jamie Paul Griffin [23/08/12 07:54 +0100]:
>> [ Polytropon wrote on Thu 23.Aug'12 at  2:00:15 +0200 ]
>>
>>> On Wed, 22 Aug 2012 19:43:55 -0400, david coder wrote:
>>> > thx, i hadn't seen the reply to my earlier message.
>>> > > unfortunately, though i've got the png port installed w/ > > 
>>> 	OPTIONS=        APNG "Animated PNG support" On
>>>
>>> That should be the default. Anyway, you can always check which
>>> options had been in use when building and installing a port:
>>>
>>> 	% cat /var/db/ports/png/options
>>> 	# This file is auto-generated by 'make config'.
>>> 	# No user-servicable parts inside!
>>> 	# Options for png-1.4.8
>>> 	_OPTIONS_READ=png-1.4.8
>>> 	WITH_APNG=true
>>>
>>> In this example you can see that it has been properly installed.
>>>
>>>
>>>
>>> > the install of freebsd fails w/ the error message given below.
>>>
>>> Sadly the Firefox build error message is not included. 
>>>
>>>
>>>
>>> > is there something else required in the png makefile or elsewhere that i'm
>>> > missing?
>>>
>>> I'm sure this entry of /usr/ports/UPDATING applies:
>>>
>>> 20120531:
>>>   AFFECTS: users of graphics/png
>>>   AUTHOR: dinoex at FreeBSD.org
>>>
>>>   The PNG library has been updated to version 1.5.10.  Please rebuild all
>>>   ports that depend on it.
>>
>> I built Firefox 14 a couple of days ago and png installed is now version 1.5.12. So an updated ports tree should incorporate that change now shouldn't it.
>
> true, but from what i have been able to sniff out on my own, ports
> configuration data are stored in /usr/local/include, not anywhere in the ports
> tree, so that if png has been installed already & you do a "make showconfig"
> in /usr/ports/graphics/png, the data are read from files in /usr/local/include,
> & if you run "make config" in /usr/ports/graphics/png, the files affected by
> any change are in /usr/local/include, not anywhere in the ports tree.
>
> this has been a learning experience for me & prolly will continue to be as
> others here correct me.
>
> david coder
> _______________________________________________

it's happened already:  in another post here, polytropon gives a more central
role to /var/db/ports/png/options.  if i understand him correctly, "make
showconfig" executed in /usr/ports/graphics/png reads from that file.
changes made through "make config" change both that file & files in
/usr/local/include & subdirectories thereof.

please correct me if i'm wrong.

david coder