Re: format as a keyword

[Gary V. Vaughan]

On 20 Mar 2008, at 20:22, Eric Blake wrote:
> | What I would like to do is STOP m4 from recognizing these 3 words as
> | internal macros. They get in the way of programs and SQL and ...
> |
> | I am going to try "undefine" but I doubt it will work for internal  
> macros.
>
> Why do you doubt?  undefine(`format') works just fine.  It's even
> documented in the manual, with an example of undefining the builtin  
> undefine:
> http://www.gnu.org/software/m4/manual/m4.html#Undefine
> http://www.gnu.org/software/m4/manual/m4.html#Defn
>
> Or disable it at the command line:
> m4 -Uformat
>
> Or, you could disable GNU extensions altogether:
> m4 -G


Or you could use the -P option to rename all builtins to start with  
m4_, which
would allow you to access the substr and index macros as m4_substr and  
m4_index respectively.

Or you could manually rename just the macros you want to rename using:

define(`myprefix_substr', defn(`substr'))undefine(`substr')dnl

Cheers,
        Gary
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