Re: Bug in autoconf version 2.50

[Akim Demaille]

>>>>> "Erik" == Erik de Castro Lopo <address@hidden> writes:

Erik> Line 66 of my configure.in file is :

Erik>   AC_MSG_WARN([*** undefine CAN_READ_XXX in src/config.h.  ])

Erik> Changing that line to this:

Erik>   AC_MSG_WARN([*** un-define CAN_READ_XXX in src/config.h.  ])

Erik> fixes the error message and everything works.

Sorry, my description was wrong.  The problem is that (nearly) all the
macros evaluate their args _once_.  Here, you did require to have

        *** undefine CAN_READ_XXX in src/config.h.

be evaluated.  While you meant to refer to the text quoted.  So you do
need _two_ levels of [ ].  Please, see the doc.  The rule of thumb is
that literal strings must be double quoted.

AC_MSG_WARN([[*** undefine CAN_READ_XXX in src/config.h.]])