[FFmpeg-devel] [PATCH] Improve detection of out-of-tree builds

[Martin Storsjö]

Hi,

The code that detects whether a build is a normal in-tree build or an 
out-of-tree build fails if configure is called in-tree with an explicit 
path.

Of course, normally one wouldn't call configure in-tree with an explicit 
path, but that's what done by "make config" at the moment.

In practice, this can be noticed with a clean checkout like this:

./configure
make config

Which ends with:

"/path/to/ffmpeg"/configure 
Out of tree builds are impossible with config.h in source dir.


The attached patch fixes this issue.

// Martin
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