AC_CHECK_PROG(ac_cv_have_rpm, rpm, "yes", "no")
if test "x$ac_cv_have_rpm" = "xyes"; then
rpm --define '_topdir /tmp' > /dev/null 2>&1
AC_CHECK_PROG(ac_cv_have_rpm, rpm, "yes", "no")
if test "x$ac_cv_have_rpm" = "xyes"; then
rpm --define '_topdir /tmp' > /dev/null 2>&1