[Elphel-support] PHP EXIF reading functions

[Sebastian Pichelhofer]

Exif reading functions like exif_read_data() would be a nice addition
to Elphel firmware:
http://www.php.net/manual/en/function.exif-read-data.php

By default the extension is not installed in the current camera firmware:

<?
$load_ext = get_loaded_extensions();
var_dump($load_ext);
?>

How can this additional module be installed / activated / cross-compiled?

Regards Sebastian