On 2008-12-04 14:50-0700 Doug Hunt wrote:

>> Also, could you put some basic cookbook-style instructions in
>> examples/perl/README.perldemos so a perl newbie (like me) could download 
>> and
>> install PDL-Graphics-PLplot-0.40?  I would like to test out your updated
>> examples. (My current installed version of PDL is 2.4.3-8 from Debian 
>> Lenny.)
>
> You should be able to download PDL-Graphics-PLplot-0.40.tar.gz from CPAN, 
> then:
>
> tar -xvzf PDL-Graphics-PLplot-0.40.tar.gz
> cd PDL-Graphics-PLplot-0.40
> perl Makefile.PL
> make
> make test
> make install

I would prefer to be able to switch back and forth between the official
Debian PDL interface to PLplot and this new version so I can compare results
for both versions. So what is the best way to set that up?  I assume there
is a way to install to a separate install prefix so you don't overwrite the
system version.  What is the syntax for that?  Also, how do you hook up the
system versions of Perl and PDL with that separate install prefix for
PDL-Graphics-PLplot-0.40?

> I just uploaded a new version to CPAN which should support this [version
test].
> Now:
>
> perl -MPDL::Graphics::PLplot -e 'print "$PDL::Graphics::PLplot::VERSION\n"'
>
> should work, printing '0.41'.  A test of 0.41 or greater should suffice, as I 
> know I'll be releasing 0.42 soon.

Thanks for this.  I just checked that the above command returns the null
string for the official Debian Lenny version (instead of erroring out) so it
should be straightforward to use this command inside a CMake execute_process
command to help set HAVE_PDL_GRAPHICS_PLPLOT_40.

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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