nesting of AC_CHECK_PROG ?

[Yasunari Tosa]

I appreciated it very much that AC_CHECK_LIB can be nested as

AC_CHECK_LIB([tlc],[Tcl_Init], [LIB_TCL=-ltcl],
    [ AC_CHECK_LIB([tcl8.4], [Tcl_Init], [LIB_TCL=-ltcl8.4],
          [AC_MSG_ERROR("FATAL: libtcl not found")] )
    ])

Unfortunately AC_CHECK_PROG() nesting does not work:

AC_CHECK_PROG([TIXWISH], [tixwish],[tixwish],
    [ AC_CHECK_PROG([TIXWISH], [tixwish8.1.8.3], [tixwish8.1.8.3],
         [AC_MSG_ERROR("FATAL: tixwish cannot be found")])
    ])

Do you have any suggestions?   

Thank you.

Tosa 

--
Yasunari Tosa, Ph.D.               Email: address@hidden
NMR Ctr, Mass. General Hospital    TEL: 617-726-4050 
Building 149, 13th Street
Charlestown, MA 02129
USA