+### and now some special lyx flags.
+AC_ARG_ENABLE(assertions,
+ [ --enable-assertions add runtime sanity checks in the program],,
+ [if test $lyx_devel_version = yes -o $lyx_prerelease = yes ; then
+ enable_assertions=yes;
+ else
+ enable_assertions=no;
+ fi;])
+if test "x$enable_assertions" = xyes ; then
+ lyx_flags="$lyx_flags assertions"
+ AC_DEFINE(ENABLE_ASSERTIONS,1,
+ [Define if you want assertions to be enabled in the code])
+fi
+