library not found for -lX11

Hi,

I submitted a package to CRAN:
http://cran.r-project.org/web/packages/vimcom/index.html

It builds on Linux without warnings, but there is the following error
on Mac OS X:

   ld: library not found for -lX11
   collect2: ld returned 1 exit status
   make: *** [vimcom.so] Error 1
   ERROR: compilation failed for package 'vimcom'

The complete log is here:
http://www.r-project.org/nosvn/R.check/r-release-macosx-ix86/vimcom-00install.html

I know that I have to edit the src/Makevars file, but I don't know
what I should put there and I don't have access to any machine running
Mac OS X to make tests. Any help will be appreciated.

The issue is not Mac specific at all. A couple points: you cannot assume X11 because R can be built with or without X11 - in fact most recent OS X comes without X11 so requiring it may limit the availability of your package. If you really require X11 you'll have to declare that in your DESCRIPTION file. Furthermore, R doesn't expose X11 flags to packages so you'll have to write a configure test to determine proper X1 flags for your package. Just adding -lX11 to Makevars doesn't work. See the autoconf documentation - there are typically tests for X11 that can be re-used (R uses them, too). This may also require special flags depending on the configuration (autoconf provides --x-libraries and --x-includes for that). I don't know what you really need - ideally, you should make any X11 code conditional on the availability of X11 --  I don't know whether that is a basic requirement for your package or not, so how to proceed from here may depend on that.

Cheers,
Simon

Thanks,

-- 
Jakson Alves de Aquino
Federal University of Cear?
Social Sciences Department
www.lepem.ufc.br/aquino.php

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