autogen.sh: Allow calling from out of tree

This is similar to the fix that was done for gstreamer

https://bugzilla.gnome.org/show_bug.cgi?id=667664

diff --git a/autogen.sh b/autogen.sh
index e43e0df..5611736 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,9 +1,20 @@
 #!/bin/sh
 
+set -e
+
 if [ `whoami` = ds ] ; then
   confargs="$confargs --enable-gtk-doc"
 fi
 
-autoreconf -i -f &&
-./configure --disable-static $confargs $@
+test -n "$srcdir" || srcdir=`dirname "$0"`
+test -n "$srcdir" || srcdir=.
+
+olddir=`pwd`
+cd "$srcdir"
+
+autoreconf -i -f
+
+cd "$olddir"
+
+$srcdir/configure --disable-static $confargs $@