Add support for autoconf macros in m4/

Needed by commit 972a34ec.

Use autoreconf in autogen.sh instead of the handwritten version,
it's simpler, and also updates things that we weren't handling.

Drop the hand-written INSTALL file.  Its information content was
~zero, and autotools wants to overwrite it with its own version,
so don't fight that, just .gitignore it.

.gitignore

@@ -15,6 +15,7 @@ config.status
 config.sub
 configure
 depcomp
+INSTALL
 install-sh
 .deps
 .libs
@@ -25,6 +26,11 @@ testcelt
 libtool
 ltmain.sh
 missing
+m4/libtool.m4
+m4/ltoptions.m4
+m4/ltsugar.m4
+m4/ltversion.m4
+m4/lt~obsolete.m4
 opus_compare
 opus_demo
 repacketizer_demo

INSTALL

-See README file for details

Makefile.am

 AUTOMAKE_OPTIONS = subdir-objects
+ACLOCAL_AMFLAGS = -I m4
 
 lib_LTLIBRARIES = libopus.la
 

autogen.sh

 #!/bin/sh
-
-# Copyright (c) 2010-2011 Jean-Marc Valin
-#
-#  This file is extracted from RFC6716. Please see that RFC for additional
-#  information.
-#
-#  Redistribution and use in source and binary forms, with or without
-#  modification, are permitted provided that the following conditions
-#  are met:
-#
-#  - Redistributions of source code must retain the above copyright
-#  notice, this list of conditions and the following disclaimer.
-#
-#  - Redistributions in binary form must reproduce the above copyright
-#  notice, this list of conditions and the following disclaimer in the
-#  documentation and/or other materials provided with the distribution.
-#
-#  - Neither the name of Internet Society, IETF or IETF Trust, nor the
-#  names of specific contributors, may be used to endorse or promote
-#  products derived from this software without specific prior written
-#  permission.
-#
-#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-#  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-#  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-#  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-#  OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-#  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-#  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-#  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-#  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-#  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
 # Run this to set up the build system: configure, makefiles, etc.
-# (based on the version in enlightenment's cvs)
+set -e
 
-package="opus"
-
-olddir=`pwd`
 srcdir=`dirname $0`
-test -z "$srcdir" && srcdir=.
-
-cd "$srcdir"
-DIE=0
-
-echo "checking for autoconf... "
-(autoconf --version) < /dev/null > /dev/null 2>&1 || {
-        echo
-        echo "You must have autoconf installed to compile $package."
-        echo "Download the appropriate package for your distribution,"
-        echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
-        DIE=1
-}
+test -n "$srcdir" && cd "$srcdir"
 
-VERSIONGREP="sed -e s/.*[^0-9\.]\([0-9]\.[0-9]*\).*/\1/"
-VERSIONMKINT="sed -e s/[^0-9]//"
-
-# do we need automake?
-if test -r Makefile.am; then
-  AM_OPTIONS=`fgrep AUTOMAKE_OPTIONS Makefile.am`
-  AM_NEEDED=`echo $AM_OPTIONS | $VERSIONGREP`
-  if test "$AM_NEEDED" = "$AM_OPTIONS"; then
-    AM_NEEDED=""
-  fi
-  if test -z $AM_NEEDED; then
-    echo -n "checking for automake... "
-    AUTOMAKE=automake
-    ACLOCAL=aclocal
-    if ($AUTOMAKE --version < /dev/null > /dev/null 2>&1); then
-      echo "yes"
-    else
-      echo "no"
-      AUTOMAKE=
-    fi
-  else
-    echo -n "checking for automake $AM_NEEDED or later... "
-    for am in automake-$AM_NEEDED automake$AM_NEEDED automake; do
-      ($am --version < /dev/null > /dev/null 2>&1) || continue
-      ver=`$am --version < /dev/null | head -n 1 | $VERSIONGREP | $VERSIONMKINT`
-      verneeded=`echo $AM_NEEDED | $VERSIONMKINT`
-      if test $ver -ge $verneeded; then
-        AUTOMAKE=$am
-        echo $AUTOMAKE
-        break
-      fi
-    done
-    test -z $AUTOMAKE &&  echo "no"
-    echo -n "checking for aclocal $AM_NEEDED or later... "
-    for ac in aclocal-$AM_NEEDED aclocal$AM_NEEDED aclocal; do
-      ($ac --version < /dev/null > /dev/null 2>&1) || continue
-      ver=`$ac --version < /dev/null | head -n 1 | $VERSIONGREP | $VERSIONMKINT`
-      verneeded=`echo $AM_NEEDED | $VERSIONMKINT`
-      if test $ver -ge $verneeded; then
-        ACLOCAL=$ac
-        echo $ACLOCAL
-        break
-      fi
-    done
-    test -z $ACLOCAL && echo "no"
-  fi
-  test -z $AUTOMAKE || test -z $ACLOCAL && {
-        echo
-        echo "You must have automake installed to compile $package."
-        echo "Download the appropriate package for your distribution,"
-        echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
-        exit 1
-  }
-fi
-
-echo -n "checking for libtool... "
-for LIBTOOLIZE in libtoolize glibtoolize nope; do
-  ($LIBTOOLIZE --version) < /dev/null > /dev/null 2>&1 && break
-done
-if test x$LIBTOOLIZE = xnope; then
-  echo "nope."
-  LIBTOOLIZE=libtoolize
-else
-  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
-
-echo "Generating configuration files for $package, please wait...."
+echo "Updating build configuration files for opusfile, please wait...."
 
 ACLOCAL_FLAGS="-I m4"
-echo "  $ACLOCAL $ACLOCAL_FLAGS"
-$ACLOCAL $ACLOCAL_FLAGS || exit 1
-echo "  autoheader"
-autoheader || exit 1
-echo "  $LIBTOOLIZE --automake"
-$LIBTOOLIZE --automake || exit 1
-echo "  $AUTOMAKE --add-missing $AUTOMAKE_FLAGS"
-$AUTOMAKE --add-missing $AUTOMAKE_FLAGS || exit 1
-echo "  autoconf"
-autoconf || exit 1
-
-cd $olddir
-#$srcdir/configure "$@" && echo
+autoreconf -isf

configure.ac

@@ -14,6 +14,7 @@ m4_define([CURRENT_VERSION],
 AC_INIT([opus],[CURRENT_VERSION],[opus@xiph.org])
 
 AC_CONFIG_SRCDIR(src/opus_encoder.c)
+AC_CONFIG_MACRO_DIR([m4])
 
 dnl enable silent rules on automake 1.11 and later
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])