_APPEND_COMPILE_FLAGS_ERROR([-Wunsafe-loop-optimizations])
_APPEND_COMPILE_FLAGS_ERROR([-funsafe-loop-optimizations])
AS_IF([test "x$ac_cv_vcs_checkout" = xyes],[
_APPEND_COMPILE_FLAGS_ERROR([-Wunsafe-loop-optimizations])
_APPEND_COMPILE_FLAGS_ERROR([-funsafe-loop-optimizations])
AS_IF([test "x$ac_cv_vcs_checkout" = xyes],[