Missing libavcodec library in ffmpeg port

[Boey Maun Suang]

Hi Dave,

On 22/04/2007, at 05:02, David Liontooth wrote:

> David Liontooth wrote:
>> Ryan Schmidt wrote:
>>
>>> On Apr 21, 2007, at 02:54, David Liontooth wrote:
>>>
>>>
>>>>     +               --extra-cflags="-I/opt/local/include"
>>>>     --extra-ldflags="-L/opt/local/lib" \
>>>>
>>> Should not need either of those since MacPorts now includes those
>>> automatically for all ports.
>>>
>> That makes sense, but if I leave them out I get this:
>>
>>     ERROR: LAME not found
>>
>> Same for xvid. It may be my environment is non-standard, but afaik  
>> I've
>> followed the usual procedures.
> Let me rephrase: what could be wrong with my build environment that
> makes ./configure not see the relevant libraries?

The problem is that MacPorts currently sets "-I/opt/local/include"  
only in CPPFLAGS, which is where it should properly go, but ffmpeg  
only looks at CFLAGS, so we need to add the contents of CPPFLAGS to  
CFLAGS to make ffmpeg happy; I'm sure that I've seen other packages  
that behave the same way.

I've committed a patch to fix this [1]; let me know how it works for  
you.

> What is the equivalent
> of /etc/ld.so.conf (a list of shared /dynamic library locations) and
> ldconfig (dynamic linker configuration) on OSX?

Neither of those exist on Mac OS X, and I don't believe that it has  
an equivalent command/configuration file technique to specify other  
directories to search for shared libraries.  The closest you can get  
is to set the DYLD_LIBRARY_PATH, DYLD_FALLBACK_LIBRARY_PATH and/or  
(for frameworks) DYLD_FALLBACK_FRAMEWORK_PATH environment variables,  
but you probably know that there are dangers associated with this  
route.  In the case of this port, however, this is moot, because the  
problem was that ffmpeg couldn't find the headers, not the shared  
libraries.

Kind regards,


Maun Suang

[1] http://trac.macports.org/projects/macports/changeset/24349

-- 
Boey Maun Suang (Boey is my surname)
Email: boeyms at macports.org