Re: gnulib-tool: indicating the presence of gnulib modules

[Eric Blake]

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According to Bruno Haible on 1/2/2007 1:55 PM:
> Hi,
> 
> Several modules already define a C macro that indicates the presence of the
> particular module:
> 
...
> 
> Some more new modules need the same pattern as well. So I'm adding this
> automatic definition of macros to gnulib-tool; the macros will be defined
> through config.h.

Sounds reasonable to me.

> 
> In the presence of multiple gnulib-tool invocations from the same directory
> with the same configure.ac file, such macros may indicate the wrong thing
> (because if you build libgnuA.a and libgnuB.a, the module may be compiled
> into libgnuA but not into libgnuB). But I think that judicious use of
> library dependencies can avoid most of the problems; and as a last resort,
> the remaining problems can be solved by splitting the configure.ac file.

What about reusing gnulib-tool --macro-prefix, then using sed to convert
GNULIB_ into the correct prefix while copying files into place?  Is it
worth this level of separation to allow cleaner use of competing gnulib
libraries in the same config.h?

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

Eric Blake             address@hidden
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