Re: iterating over arguments

[Eric Blake]

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According to Sam Steingold on 9/12/2009 10:16 PM:
> 
> replacing "m4_toupper" with "upcase" resulted in a "good" configure with,
> e.g., "upcase(ffi)" instead of "FFI".

Where is upcase defined?  It isn't provided by autoconf.

> replacing it with "m4_upcase" resulted in
> 
> configure:4249: error: possibly undefined macro: m4_upcase
>       If this token and others are legitimate, please use m4_pattern_allow.
>       See the Autoconf documentation.
> 

That's because there isn't a macro m4_upcase; it is spelled m4_toupper.

But I do see an issue with using m4_toupper - it does not quote its
result, so if the result resembles a macro name, that macro will be
expanded before anything else gets a chance to use the result of the
upper-casing.  I don't think we can change the semantics of this (there
may be existing code relying on this), but we probably need to add safer
counterparts that return a quoted string.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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