[FFmpeg-devel] [PATCH] Fix pkg-config detection when using a cross-prefix

[Derek Buitenhuis]

On 02/07/2012 3:47 PM, Kyle Schwarz wrote:
> No one compiles a pkg-config for a cross toolchain. It has a lot of 
> circular dependency's and is a pain to compile. Everyone simple finds 
> some way to hack the FFmpeg to use the native one. These hacks would not 
> be needed if FFmpeg's configure functioned like other package configures 
> and had a fallback.

This is a lie and I can think of an exact circumstance this happens.

Stuff like Yocto/Poky and OpenEmbedded DO.

Imagine the following scenario:

I am in an x86_64 eglibc based Linux system. I am using an x86_86
cross-toolchain to generate x86_64 code for systems using uclibc.

It fails to find the cross-pkg-config (which these DO provide), and it
attempts to link to the host's libraries, which output all manner
of confusing and misleading errors.

(And yes it's real: http://chromashift.org/tools/linux/poky-uclibc-x86_64-x86_64-static-toolchain-1.2%2bsnapshot-20120507.tar.xz)

- Derek