dnl Platform specific tests
dnl ------------------------------------------------------------------------
-dnl xlC needs -qunique (at least on AIX) so that one source file can be
+dnl xlC needs -qunique under AIX so that one source file can be
dnl compiled to multiple object files and safely linked together.
-if test "x$XLCXX" = "xyes"; then
+if test "x$XLCXX" = "xyes" -a "x$USE_AIX" = "x1"; then
CXXFLAGS="$CXXFLAGS -qunique"
fi