+# enable/disable readline
+AC_ARG_WITH([readline],
+ [AS_HELP_STRING([--with-readline], [support fancy command line editing @<:@default=check@:>@])],
+ [with_readline="$withval"], [with_readline=yes])
+
+# enable debug build
+AC_ARG_ENABLE(debug,
+ [AS_HELP_STRING([--enable-debug], [enable debug mode [default=no]])],
+ [enable_debug=yes], [enable_debug=no])
+
+# enable/disable documentation generation
+AC_ARG_ENABLE(doc,
+ [AS_HELP_STRING([--enable-doc], [enable documentation generation [default=no]])],
+ [enable_doc=yes], [enable_doc=no])
+
+# enable/disable build of NgSpy
+AC_ARG_ENABLE(spy,
+ [AS_HELP_STRING([--enable-spy], [enable NgSpy [default=no]])],
+ [enable_spy=yes], [enable_spy=no])
+AM_CONDITIONAL(ENABLE_SPY, test x$enable_spy = xyes)
+
+# enable/disable build of NgEmu
+AC_ARG_ENABLE(emu,
+ [AS_HELP_STRING([--enable-emu], [enable NgEmu [default=no]])],
+ [enable_emu=yes], [enable_emu=no])
+AM_CONDITIONAL(ENABLE_EMU, test x$enable_emu = xyes)
+
+
+
+AS_IF([test "x${enable_doc}" = "xyes"], [
+ AC_CHECK_PROGS([DOXYGEN], [doxygen])
+ AS_IF([test -z "$DOXYGEN"], [
+ AC_MSG_ERROR([Doxygen not found])
+ ])
+])
+AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])
+
+
+AS_IF([test "x${with_readline}" != "xno"], [
+ AC_CHECK_LIB([readline], [readline], [
+ AC_SUBST([READLINE_LIBS], [-lreadline])
+ AC_DEFINE([HAVE_LIBREADLINE], [1], [Define if you have libreadline])
+ ], [
+ AC_MSG_FAILURE([readline test failed (--without-readline to disable)])
+ ])
+])
+
+
+
+CFLAGS="-Wall -Wextra -Os"
+
+if test "x${enable_debug}" = xyes; then
+ CFLAGS="$CFLAGS -g"
+else
+ CFLAGS="$CFLAGS -fomit-frame-pointer"
+ LDFLAGS="$LDFLAGS -s"
+fi