-# Generate acinclude.m4
-echo -n "Generate acinclude.m4... "
-rm -f acinclude.m4 sigc++/acinclude.m4
-touch acinclude.m4
-for fil in config/lyxinclude.m4 config/libtool.m4 config/gettext.m4 config/lcmessage.m4 config/progtest.m4 config/sigc++.m4 config/kde.m4 config/gnome/aclocal-include.m4 config/gnome/gnome-print-check.m4 config/gnome/compiler-flags.m4 config/gnome/gnome-pthread-check.m4 config/gnome/curses.m4 config/gnome/gnome-support.m4 config/gnome/gnome-bonobo-check.m4 config/gnome/gnome-undelfs.m4 config/gnome/gnome-common.m4 config/gnome/gnome-vfs.m4 config/gnome/gnome-fileutils.m4 config/gnome/gnome-x-checks.m4 config/gnome/gnome-ghttp-check.m4 config/gnome/gnome-xml-check.m4 config/gnome/gnome-gnorba-check.m4 config/gnome/gnome.m4 config/gnome/gnome-guile-checks.m4 config/gnome/gperf-check.m4 config/gnome/gnome-libgtop-check.m4 config/gnome/linger.m4 config/gnome/gnome-objc-checks.m4 config/gnome/need-declaration.m4 config/gnome/gnome-orbit-check.m4 config/gnome/gtk--.m4 config/gnome/gnome--.m4 ; do
- cat $fil >> acinclude.m4
-done
-touch sigc++/acinclude.m4
-for fil in config/libtool.m4 ; do
- cat $fil >> sigc++/acinclude.m4
-done
-echo "done."
+case $automake_version in
+ *' '1.1[456]*)
+ ;;
+ *)
+ echo "This automake version is not supported by LyX."
+ echo "LyX only supports automake 1.14 through 1.16."
+ exit 1
+ ;;
+esac
+
+# Discover what version of autoconf we are using.
+autoversion=$($AUTOCONF --version 2>/dev/null | head -n 1)
+
+if test "$autoversion" != ""; then
+ echo "Using $autoversion"
+else
+ echo "LyX requires autoconf >= 2.65"
+ exit 1
+fi
+
+case $autoversion in
+ *' '2.6[5-9])
+ ;;
+ *)
+ echo "This autoconf version is not supported by LyX."
+ echo "LyX only supports autoconf 2.65-2.69."
+ exit 1
+ ;;
+esac
+
+# Delete old cache directories.
+# automake will stop if their contents was created by an earlier version.
+rm -rf autom4te.cache