[Plib-users] patch for building on OSX

[Reed H. <re...@ze...>]

Attached is a patch for building on OSX, against a CVS checkout from 
yesterday... I hope it still works. Let me know
if it doesn't & i'll remake it for a new co.  (it can be applied from 
the root plib CVS directory with -p1)

I did not work on js, sl or net at all [maybe put a note about that in 
README.mac?], but AFAIK all of sg, ul,
ssg and ssgAux work, and most of fnt and pui -- there is one segfault in 
FilePicker that I need to track down.

configure.in detects a host type  matching *-apple-darwin* and uses a 
new LIBS line for the OpenGL and
GLUT frameworks, like it looks like it does for Win32 (cygwin).  It also 
checks for OpenGL/gl.h and
GLUT/glut.h headers and adds MACOSX_OPENGL and MACOSX_GLUT defines 
respectively.   Various
source files then have "#ifdef" lines to check for those symbols, in the 
libs (except js, sl and net) and some of the
stuff in examples/.   The two glIsValidContext() functions also use 
MACOSX_OPENGL to work around
broken AGL on OSX -- this function will always return true.  There might 
be a way to call the Objective-C
method that ought to work, If i get it working i'll let y'all know.

have a safe and fun New Year's

reed