[CMake] TGZ installer following links

[Alan W. Irwin]

On 2011-06-22 12:04-0400 Bill Hoffman wrote:

> On 6/21/2011 4:43 PM, Alan W. Irwin wrote:
>
>> So it is not a regression, but in my opinion it is still a bug.
>> 
>> More comments at http://public.kitware.com/Bug/view.php?id=12284.
>> 
>> Please fix.
>> 
>
> Patches are welcome, please send one...   It would have to be an option 
> somehow at this point so as not to break existing code.

I am fine with such an option.  GNU tar (at least) also has an option
to follow symlinks or not.  Of course, the CPack option will have
a different default than the GNU tar one, but that is required for
CPack backwards compatibility.

I don't understand C++ or the C++ internals of CMake well enough to
put together a patch to solve this issue.  So I am limited to helping
you guys out by doing testing to help clarify CMake bug issues and
commenting on the practical implications of certain CMake bug reports
like this one for the build systems of software projects like PLplot
and FreeEOS to give you a better idea of what is at stake.

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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Linux-powered Science
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