New configure facility.

prepare

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+if aclocal -I m4 && autoheader && autoconf; then
+	conffile="Jamconfig.in"
+
+	echo "#" > $conffile
+	echo "# Do not edit this file. Edit configure.in and *.m4 files" >> $conffile 
+	echo "# and run './prepare'" >> $conffile
+	echo "#" >> $conffile
+	echo "" >> $conffile
+
+	# a cool trict from autojam
+	autoconf --trace=AC_SUBST \
+  	| sed -e 's/configure.in:[0-9]*:AC_SUBST:\([^:]*\).*/\1 ?= "@\1@" ;/g' \
+	| sed -e '/ac_*/d' -e '/ECHO_*/d' \
+	| sort -u \
+  	>> $conffile
+
+	echo 'INSTALL_DIR ?= "@INSTALL_DIR@" ;' >> $conffile
+
+	# a junk from autoheader
+	rm -f "edeconf.h.in~"
+
+	echo ""
+	echo "Now run ./configure [OPTIONS]"
+	echo "or './configure --help' to see them"
+else
+	echo ""
+	echo "We failed :(. There should be some output, right ?"
+	exit 1
+fi