[CMake] append command

[Alan W. Irwin]

On 2011-08-11 17:35-0400 David Cole wrote:

> It's clear what you mean with the REGEX signatures, but I disagree about the optional nature of at least one input.
> 
> In my experience, the lack of an input to one of these signatures usually means there's a typo in a dereferenced variable name, or the
> variable is unexpectedly empty.
> 
> It may or may not be the same as the output variable... but I think it's a good thing when you get a CMake error in such a case, as is
> the case now. I hesitate to stop generating that error.

I assumed the CMake logic parser could distinguish by a count of
arguments between the case where the last <input> argument was missing
(i.e. nothing specified by the user) as opposed to the cases you
mention where there is something there such as a dereferenced
non-existent variable or variable that is unexpectedly empty.
However, if the parser cannot distinguish the non-existent last
argument case from all others, then I would sadly have to agree with
your conclusion that my idea should be rejected.  Because I do agree
you want to continue to generate CMake errors for the cases you
mention.

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of
Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
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