+ACLOCAL="aclocal -I ${PWD}/m4"
+AUTOHEADER="autoheader"
+AUTOMAKE="automake --add-missing --copy --foreign"
+AUTOCONF="autoconf"
+ACINCLUDE_FILES="lyxinclude.m4 libtool.m4 pkg.m4 qt.m4 qt4.m4 spell.m4"
+
+# Discover what version of automake we are using.
+automake_version=`$AUTOMAKE --version 2>/dev/null | head -n 1`
+
+test "$automake_version" != "" && {
+ echo "Using $automake_version"
+} || {
+ echo "LyX requires automake >= 1.9"
+ exit 1
+}
+
+case $automake_version in
+ *' '1.9*)
+ ;;
+ *)
+
+ echo "This automake version is not supported by LyX."
+ echo "LyX only supports automake 1.9."
+ exit 1
+ ;;
+esac
+
+# Discover what version of autoconf we are using.
+autoversion=`$AUTOCONF --version 2>/dev/null | head -n 1`
+
+test "$autoversion" != "" && {
+ echo "Using $autoversion"
+} || {
+ echo "LyX requires autoconf >= 2.52"
+ exit 1
+}
+
+case $autoversion in
+ *' '2.5[2-9]|*' '2.60[ab]|*' '2.6[0-1])
+ EXTRA_ACINCLUDE_FILES="lyxinclude25x.m4"
+ ;;
+ *)
+ echo "This autoconf version is not supported by LyX."
+ echo "LyX only supports autoconf 2.52-2.61."
+ exit 1
+ ;;
+esac
+
+echo -n "Locating GNU m4... "