[FFmpeg-devel] [PATCH] Use pkg-config for libschroedinger libs

Ramiro Polla ramiro
Mon May 12 23:18:33 CEST 2008

JonY wrote:
> Ramiro Polla wrote:
>> Reimar D?ffinger wrote:
>>> On Mon, May 12, 2008 at 05:13:04PM +0100, Ramiro Polla wrote:
>>>>>>>> also pkg-config is used in the line above for cflags,
>>>>>>>> the patch just fixes one missing use of pkg-config
>>>>>>> Two wrongs don't make a right.
>>>>>> just pointing it out, leaving it like it is now sure is the worst
>>>>>> solution.
>>>>>> a) use pkg-config and use it in all cases
>>>>>> b) dont use pkg-config at all
>>>>>> the patch fixes configure to conform to a)
>>>>>> you propose b) instead?
>>>>>> what are those systems without pkg-config if i may ask?
>>>>> That's irrelevant. As long as pkg-config isn't mandated by
>>>>> POSIX, we should assume it might not be there.
>>>> We should get rid of memalign() too. After all, it's not POSIX...
>>> Huh? FFmpeg already works without memalign. And there is even a hack
>>> that allows even the assembler optimizations to work without it.
>> Well, then it should be a configure option:
>> ./configure --enable-memalign
>>> So to me it seems your example actually confirms Mans' opinion?
>>> Also I think there is no problem to _also_ try pkg-config, but depending
>>> on it really is not a great thing - also as it encourages projects using
>>> pkg-config to do sloppy dependency-managment.
>> Good idea. It doesn't take an extraordinary amount of time and effort to
>> come up with an idea like attached patch.
>> [...]
>> Ramiro Polla
> Hi,
> Problem is add_cflags still depends on pkg-config for proper cflags. The 
> libschroedinger headers will not work properly without the correct cflags.
> Maybe configure should check for pkg-config earlier and determine how to 
> proceed if its not installed.

Right, and if pkg-config is not installed we can maybe read a few bytes 
from /dev/urandom and feed them as CFLAGS.

By the way, could you give us an example of what the libschroedinger 
CFLAGS look like (I'm too lazy to look it up atm =).

Ramiro Polla

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