--- gcc-4.5.2/configure.orig	2011-04-28 17:25:37.091035400 -0600
+++ gcc-4.5.2/configure	2011-04-28 17:26:26.868332200 -0600
@@ -3741,6 +3741,10 @@
     ;;
 esac
 
+# If we are building against NuttX, then don't attempt to build libstdc++
+# (should be conditioned on --with-nuttx)
+noconfigdirs="$noconfigdirs target-libiberty target-libstdc++-v3"
+
 # If we aren't building newlib, then don't build libgloss, since libgloss
 # depends upon some newlib header files.
 case "${noconfigdirs}" in