On 2009-01-26 10:47+0100 Werner Smekal wrote:
>> * How do you run the examples?
>
> * Enable lua bindings with -DENABLE_lua=ON
> * lua, lualib, lualiblib must be installed, plus developer packages
> (Ubuntu/Debian)
> * cd build-directory/bindings/lua (here you should find plplotluac.so)
> * lua source-directory/examples/lua/x05.lua
I have committed a small change (revision 9410) so that the user who has set
ENABLE_lua to ON has the HAVE_lua51 option available for building for
lua-5.1 rather than lua-5.0. The HAVE_lua51 default is OFF (i.e., by
default the build will proceed for lua-5.0).
When I built for lua-5.0, the instructions above succeeded. Specifically,
if I execute from the build-tree version of bindings/lua
lua ../../../plplot_cmake/examples/lua/x05.lua -dev xwin
I got the expected results.
However, when I built for lua-5.1 and followed the same run-time
instructions I got an error, e.g.,
softw...@raven> lua ../../../plplot_cmake/examples/lua/x05.lua -dev xwin
lua: Table doesn't contain key 'n'.
stack traceback:
[C]: in function 'parseopts'
../../../plplot_cmake/examples/lua/x05.lua:23: in main chunk
[C]: ?
Probably you will want to concentrate on 5.0 for now, but at some point it
would be nice to get 5.1 working as well for the current examples. Note, I
have all required packages for lua5.0 and lua5.1 installed from Debian
testing, and I use the update-alternatives Debian system script to symlink
/usr/bin/lua to the correct lua version for the type of build I want to do.
> Not perfect, but at least for lua 5.0 there is no easy way to tell lua where
> the shared library is (apart from setting an absolut path in the source).
I think we should solve that problem in a similar way to what we do for
python. Every python example imports a file that is configured to tell it
the absolute location of the required python modules. The file is configured
differently depending if it is for the build tree or install tree version.
For the Lua case, I suggest we include a file that is configured with the
correct absolute location (build tree location for now) of plplotluac. A
quick google search indicates there is something called "dofile" for
including a file into a lua script. If you agree that is the right way to
deal with this situation, I can do the rest to get lua example scripts that
work from the examples/lua directory. Once that is accomplished, it is a
relatively small step to getting ctest for lua working.
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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