Sync with upstream gcc.

configure.ac

@@ -805,6 +805,9 @@ case "${target}" in
   *-*-netware*)
     noconfigdirs="$noconfigdirs ${libgcj}"
     ;;
+  *-*-phoenix*)
+    noconfigdirs="$noconfigdirs ${libgcj}"
+    ;;
   *-*-rtems*)
     noconfigdirs="$noconfigdirs ${libgcj}"
     ;;
@@ -1061,6 +1064,9 @@ case "${target}" in
     ;;
   *-*-netware*)
     ;;
+  *-*-phoenix*)
+    noconfigdirs="$noconfigdirs target-libgloss"
+    ;;
   *-*-rtems*)
     noconfigdirs="$noconfigdirs target-libgloss"
     # this is not caught below because this stanza matches earlier
@@ -1098,8 +1104,6 @@ case "${target}" in
   arm-*-riscix*)
     noconfigdirs="$noconfigdirs ld target-libgloss"
     ;;
-  avr-*-rtems*)
-    ;;
   avr-*-*)
     if test x${with_avrlibc} != xno; then
       noconfigdirs="$noconfigdirs target-newlib target-libgloss"