[FFmpeg-devel] [PATCH] Use pkgconfig for dirac libs

[Diego 'Flameeyes' Pettenò]

M?ns Rullg?rd <mans at mansr.com> writes:

>> Are you using the command as "pkg-config" ? pkg-config is a tool that,
>> akin to gcc, ld and others, have a CTARGET as well as a CHOST; this
>> means that you should have an arm-unknown-linux-gnueabi-pkg-config
>> command that looks in /usr/arm-unknown-linux-gnueabi/usr/lib/pkgconfig
>> rather than in /usr/lib/pkgconfig .
>
> It *does* look there; that's not the problem.  The problem is that the
> pkgconfig files installed there point to /usr.  Go figure.

Uh? May I ask what tool is building /usr/arm-unknown-linux-gnueabi tree
then? I'm sure enough that the (scarse) Gentoo crosscompiling supports
generate proper .pc files that _don't_ point to /usr/lib so I'd be ready
to expect a bug in some build tool that prepares that root...

>> I just checked the configure and it uses pkg-config directly; instead it
>> should use "${cross_prefix}pkg-config", and then it wouldn't "lie" to you
>> anymore. Yes I know it's no the most intuitive of things, but if you
>> think a bit about how crosscompiling is done it does fit in.
>
> The more I think, the more useless pkgconfig seems.  The compiler is
> already configured to look in the cross-root.  It's pkgconfig that
> sends it elsewhere.

A properly-configured pkg-config executable shouldn't send it anywhere;
standard non-crosscompiling pkg-config never returns -I/usr/include or
-L/usr/lib (or -L/usr/lib64 on amd64 multilib systems); a
properly-configured crosscompiling pkg-config will do the same...

> I'm not talking about the ffmpeg configure script.  I'm talking about
> supposedly kosher autohell-generated scripts in various packages,
> including gnu coreutils.
>
> If I don't use pkgconfig, everything works as expected; if I do use it,
> all hell breaks loose.  Hence, I won't use it unless forced to.

May I ask to see a config.log to make sure the right pkg-config is
picked up? Since I do work in the field of cross-compiling I'm quite
interested to see if there are such problems and resolve them.

-- 
Diego "Flameeyes" Petten?
http://blog.flameeyes.eu/
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