diff -ruwN source/configure source-new/configure
--- source/configure	2022-11-06 04:13:26.000000000 +0700
+++ source-new/configure	2026-02-17 13:42:38.449890407 +0700
@@ -3480,8 +3480,6 @@
 echo $ECHO_N "checking if $CXX works... $ECHO_C" >&6
 
 		save_CPPFLAGS="$CPPFLAGS"
-		eval cf_includedir=${includedir}
-		CPPFLAGS="$CPPFLAGS -I${cf_includedir}"
 
 cat >"conftest.$ac_ext" <<_ACEOF
 #line 3487 "configure"
@@ -6386,7 +6384,7 @@
 		fi
 		cf_cv_rm_so_locs=yes
 		;;
-	(linux*|gnu*|k*bsd*-gnu)
+	(linux*|gnu*|k*bsd*-gnu|redox*)
 		if test "$DFT_LWR_MODEL" = "shared" && test -n "$LD_RPATH_OPT" ; then
 			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
 			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"