Please find attached an updated tarball.

Attempting no lower case #declare, #local identifier idea. Hope is 
user's function and macro arguments made _<lower case> form will be 
immune to name collisions.

With a thought toward eventual real time modeling, continuous real time 
rendering enabled as it has been in window's versions since v37. Added a 
rtr_kla.pov sample scene for the feature.

The rtr_kla.pov scene implements an alternative to the persistent 
keyword marking idea of uberpov. While the continuous / real time 
rendering only supports multiple camera positions today, multiple frames 
can be rendered with one scene parse where more than the camera changes.

The idea is to create multiple fixed sets in which changes are made and 
where a camera is appropriately placed in each. Mentally one must, of 
course, still keep track of what is persistent and what is not, but we'd 
not need a new keyword and the code infrastructure behind it - supposing 
eventual frame capture capability. Simpler, perhaps, to look at the 
sample scene to get the idea.

Corrections to the DOINGMAKECHECK=YES build implementation - thanks jr.

I've not seen an x11 display issue in the week since adding the 
XInitThreads() call - thanks jr. Thinking of making x11 the default as 
it's windowing behavior is more consistent with my Ubuntu environment.

Added an inbuilt f_toupie() function supporting 1-15 as integer 
exponents where f_toupie() usually uses 3. Provides for a range of 
shapes lemon like, torus like (exactly the torus at 2), toupie like and 
button-ish shapes.

Bill P.

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