AS_IF([test x$enable_server = xno],
[AS_CASE([$enable_ldiskfs],
[maybe], [enable_ldiskfs=no],
[yes], [AC_MSG_ERROR([cannot build ldiskfs when servers are disabled])]
AS_IF([test x$enable_server = xno],
[AS_CASE([$enable_ldiskfs],
[maybe], [enable_ldiskfs=no],
[yes], [AC_MSG_ERROR([cannot build ldiskfs when servers are disabled])]