diff --git a/autogen.sh b/autogen.sh
index a26be1b1f78e59818ca65fcd39af3a91b758f8a0..380d1f3ca6dccbc471ecf2deade836d8ed8f2a20 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -1,130 +1,14 @@
 #!/bin/sh
-# Run this to set up the build system: configure, makefiles, etc.
-# (based on the version in enlightenment's cvs)
-
-package="theora"
+# Copyright (c) 2010-2015 Xiph.Org Foundation and contributors.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the COPYING file.
 
-ACLOCAL_FLAGS="-I m4"
+# Run this to set up the build system: configure, makefiles, etc.
+set -e
 
-olddir=`pwd`
 srcdir=`dirname $0`
-test -z "$srcdir" && srcdir=.
-
-cd "$srcdir"
-DIE=0
-
-/bin/echo "checking for autoconf... "
-(autoconf --version) < /dev/null > /dev/null 2>&1 || {
-        echo
-        echo "You must have autoconf installed to compile $package."
-        echo "Download the appropriate package for your distribution,"
-        echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
-        DIE=1
-}
-
-VERSIONGREP="sed -e s/.*[^0-9\.]\([0-9][0-9]*\.[0-9][0-9]*\).*/\1/"
-VERSIONMKMAJ="sed -e s/\([0-9][0-9]*\)[^0-9].*/\\1/"
-VERSIONMKMIN="sed -e s/.*[0-9][0-9]*\.//"
-
-# do we need automake?
-if test -r Makefile.am; then
-  AM_OPTIONS=`fgrep AUTOMAKE_OPTIONS Makefile.am`
-  AM_NEEDED=`echo $AM_OPTIONS | $VERSIONGREP`
-  if test x"$AM_NEEDED" = "x$AM_OPTIONS"; then
-    AM_NEEDED=""
-  fi
-  if test -z $AM_NEEDED; then
-    /bin/echo -n "checking for automake... "
-    AUTOMAKE=automake
-    ACLOCAL=aclocal
-    if ($AUTOMAKE --version < /dev/null > /dev/null 2>&1); then
-      /bin/echo "yes"
-    else
-      /bin/echo "no"
-      AUTOMAKE=
-    fi
-  else
-    /bin/echo -n "checking for automake $AM_NEEDED or later... "
-    majneeded=`echo $AM_NEEDED | $VERSIONMKMAJ`
-    minneeded=`echo $AM_NEEDED | $VERSIONMKMIN`
-    for am in automake-$AM_NEEDED automake$AM_NEEDED \
-	automake automake-1.7 automake-1.8 automake-1.9 \
-        automake-1.10 automake-1.11; do
-      ($am --version < /dev/null > /dev/null 2>&1) || continue
-      ver=`$am --version < /dev/null | head -n 1 | $VERSIONGREP`
-      maj=`echo $ver | $VERSIONMKMAJ`
-      min=`echo $ver | $VERSIONMKMIN`
-      if test $maj -eq $majneeded -a $min -ge $minneeded; then
-        AUTOMAKE=$am
-        /bin/echo $AUTOMAKE
-        break
-      fi
-    done
-    test -z $AUTOMAKE &&  /bin/echo "no"
-    /bin/echo -n "checking for aclocal $AM_NEEDED or later... "
-    for ac in aclocal-$AM_NEEDED aclocal$AM_NEEDED \
-	aclocal aclocal-1.7 aclocal-1.8 aclocal-1.9 aclocal-1.10 aclocal-1.11; do
-      ($ac --version < /dev/null > /dev/null 2>&1) || continue
-      ver=`$ac --version < /dev/null | head -n 1 | $VERSIONGREP`
-      maj=`echo $ver | $VERSIONMKMAJ`
-      min=`echo $ver | $VERSIONMKMIN`
-      if test $maj -eq $majneeded -a $min -ge $minneeded; then
-        ACLOCAL=$ac
-        /bin/echo $ACLOCAL
-        break
-      fi
-    done
-    test -z $ACLOCAL && /bin/echo "no"
-  fi
-  test -z $AUTOMAKE || test -z $ACLOCAL && {
-        echo
-        echo "You must have automake installed to compile $package."
-        echo "Download the appropriate package for your distribution,"
-        echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
-        exit 1
-  }
-fi
-
-/bin/echo -n "checking for libtool... "
-for LIBTOOLIZE in libtoolize glibtoolize nope; do
-  ($LIBTOOLIZE --version) < /dev/null > /dev/null 2>&1 && break
-done
-if test x$LIBTOOLIZE = xnope; then
-  /bin/echo "nope."
-  LIBTOOLIZE=libtoolize
-else
-  /bin/echo $LIBTOOLIZE
-fi
-($LIBTOOLIZE --version) < /dev/null > /dev/null 2>&1 || {
-	echo
-	echo "You must have libtool installed to compile $package."
-	echo "Download the appropriate package for your system,"
-	echo "or get the source from one of the GNU ftp sites"
-	echo "listed in http://www.gnu.org/order/ftp.html"
-	DIE=1
-}
-
-if test "$DIE" -eq 1; then
-        exit 1
-fi
-
-if test -z "$*"; then
-        echo "I am going to run ./configure with no arguments - if you wish "
-        echo "to pass any to it, please specify them on the $0 command line."
-fi
-
-/bin/echo "Generating configuration files for $package, please wait...."
+test -n "$srcdir" && cd "$srcdir"
 
-/bin/echo "  $ACLOCAL $ACLOCAL_FLAGS"
-$ACLOCAL $ACLOCAL_FLAGS || exit 1
-/bin/echo "  $LIBTOOLIZE --automake --force"
-$LIBTOOLIZE --automake --force || exit 1
-/bin/echo "  autoheader"
-autoheader || exit 1
-/bin/echo "  $AUTOMAKE --add-missing $AUTOMAKE_FLAGS"
-$AUTOMAKE --add-missing $AUTOMAKE_FLAGS || exit 1
-/bin/echo "  autoconf"
-autoconf || exit 1
+echo "Updating build configuration files, please wait...."
 
-cd $olddir
-$srcdir/configure "$@" && /bin/echo
+autoreconf -isf