dnl [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
dnl -flto -ffat-lto-objects])],
dnl [AC_MSG_RESULT([skipping -flto, optimization not enabled])])
dnl [CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\
dnl -flto -ffat-lto-objects])],
dnl [AC_MSG_RESULT([skipping -flto, optimization not enabled])])