Dear sage-devel, In trying to get R to work as well as possible when it comes to additional packages, I notice that one problem is that on some systems certain libraries or headers (I'm not using those terms correctly, probably) are available, and on others not. Here is a snippet of an example with package 'rgl', which is needed for package 'depth':
checking GL/gl.h usability... no checking GL/gl.h presence... no checking for GL/gl.h... no checking GL/glu.h usability... no checking GL/glu.h presence... no checking for GL/glu.h... no configure: error: missing required header GL/gl.h This was on boxen.math (and occurred on sage.math before it bit the dust). However, on my Macintel 10.5, it seems to install fine. Apparently this has to do with OpenGL graphics support already being on a machine, though I'm not 100% sure. Anyway, if someone has an obvious workaround for this sort of thing, it would be great, but I assume not. Failing that, perhaps we should put a warning in the install_packages() command for R that some packages may require things not available on a given system. Any thoughts? - kcrisman
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