Replace autogen.sh with a simple wrapper for autoreconf.

The autoreconf tool does the same tool detection the older
shell script does, and is now sufficiently widely deployed
to depend on. The new script is what is currently used in
other Xiph.Org projects.

Note this is a change to the new pattern of needing to
invoke ./configure separately after running ./autogen.sh.

(Fix #2254)

autogen.sh

@@ -1,124 +1,10 @@
 #!/bin/sh
 # Run this to set up the build system: configure, makefiles, etc.
-# (based on the version in enlightenment's cvs)
+set -e
 
-package="icecast"
-
-olddir=`pwd`
 srcdir=`dirname $0`
-test -z "$srcdir" && srcdir=.
+test -n "$srcdir" && cd "$srcdir"
 
-cd "$srcdir"
-DIE=0
+echo "Updating build configuration files for Icecast, please wait...."
 
-(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\.]\([0-9]\.[0-9]\).*/\1/"
-                                                                                
-# do we need automake?
-if test -r Makefile.am; then
-    echo "Checking for automake version"
-    options=`fgrep AUTOMAKE_OPTIONS Makefile.am`
-    AM_NEEDED=`echo "$options" | $VERSIONGREP`
-    AM_PROGS=automake
-    AC_PROGS=aclocal
-    if test -n "$AM_NEEDED" && test "x$AM_NEEDED" != "x$options"
-    then
-        AM_PROGS="automake-$AM_NEEDED automake$AM_NEEDED $AM_PROGS"
-        AC_PROGS="aclocal-$AM_NEEDED aclocal$AM_NEEDED $AC_PROGS"
-    else
-        AM_NEEDED=""
-    fi
-    AM_PROGS="$AUTOMAKE $AM_PROGS"
-    AC_PROGS="$ACLOCAL $AC_PROGS"
-    for am in $AM_PROGS; do
-      ($am --version > /dev/null 2>&1) 2>/dev/null || continue
-      ver=`$am --version | head -1 | $VERSIONGREP`
-      AWK_RES=`echo $ver $AM_NEEDED | awk '{ if ( $1 >= $2 ) print "yes"; else print "no" }'`
-      if test "$AWK_RES" = "yes"; then
-        AUTOMAKE=$am
-        echo "  found $AUTOMAKE"
-        break
-      fi
-    done
-    for ac in $AC_PROGS; do
-      ($ac --version > /dev/null 2>&1) 2>/dev/null || continue
-      ver=`$ac --version < /dev/null | head -1 | $VERSIONGREP`
-      AWK_RES=`echo $ver $AM_NEEDED | awk '{ if ( $1 >= $2 ) print "yes"; else print "no" }'`
-      if test "$AWK_RES" = "yes"; then
-        ACLOCAL=$ac
-        echo "  found $ACLOCAL"
-        break
-      fi
-    done
-    test -z $AUTOMAKE || test -z $ACLOCAL && {
-        echo
-        if test -n "$AM_NEEDED"; then
-            echo "You must have automake version $AM_NEEDED installed"
-            echo "to compile $package."
-        else
-            echo "You must have automake installed to compile $package."
-        fi
-        echo "Download the appropriate package for your distribution,"
-        echo "or get the source tarball at ftp://ftp.gnu.org/pub/gnu/"
-        DIE=1
-      }
-fi
-
-if command libtoolize --version 2>/dev/null; then
-  USE_GLIBTOOLIZE=0
-else
-  if command glibtoolize --version 2>/dev/null; then
-    USE_GLIBTOOLIZE=1
-  else
-    echo
-    echo "You must have libtool installed to compile $package."
-    echo "Download the appropriate package for your system,"
-    echo "or get the source from one of the GNU ftp sites"
-    echo "listed in http://www.gnu.org/order/ftp.html"
-    DIE=1
-  fi
-fi
-
-if test "$DIE" -eq 1; then
-  exit 1
-fi
-
-echo "Generating configuration files for $package, please wait...."
-
-ACLOCAL_FLAGS="$ACLOCAL_FLAGS -I m4"
-if test -n "$ACLOCAL"; then
-  echo "  $ACLOCAL $ACLOCAL_FLAGS"
-  $ACLOCAL $ACLOCAL_FLAGS
-fi
-
-echo "  autoheader"
-autoheader
-
-if test "$USE_GLIBTOOLIZE" -eq 0; then
-  echo "  libtoolize --automake"
-  libtoolize --automake
-else
-  echo "  glibtoolize --automake"
-  glibtoolize --automake
-fi
-
-if test -n "$AUTOMAKE"; then
-  echo "  $AUTOMAKE --add-missing"
-  $AUTOMAKE --add-missing 
-fi
-
-echo "  autoconf"
-autoconf
-
-if test -z "$*"; 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
-cd $olddir
-$srcdir/configure "$@" && echo
+autoreconf -isf