--- libstdc++-v3/configure.host.orig	2016-10-24 12:26:59 UTC
+++ libstdc++-v3/configure.host
@@ -229,6 +229,9 @@ case "${host_os}" in
     os_include_dir="os/generic"
     atomicity_dir="cpu/generic"
     ;;
+  bsdsunix*)
+    os_include_dir="os/bsd/bsdsunix"
+    ;;
   bsd*)
     # Plain BSD attempts to share FreeBSD files.
     os_include_dir="os/bsd/freebsd"
@@ -262,7 +265,7 @@ case "${host_os}" in
   freebsd*)
     os_include_dir="os/bsd/freebsd"
     ;;
-  gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
+  gnu* | linux* | kbsdsunix*-gnu | kfreebsd*-gnu | knetbsd*-gnu)
     if [ "$uclibc" = "yes" ]; then
       os_include_dir="os/uclibc"
     elif [ "$bionic" = "yes" ]; then
@@ -352,6 +355,9 @@ case "${host}" in
 	;;
     esac
     ;;
+  arm*-*-bsdsunix*)
+     port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
+     ;;
   arm*-*-freebsd*)
      port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
      ;;