🚀 go-pugleaf

Has anybody there successfully compiled the 3.1 beta with the newly
released IBM C++ compiler xlC? My experience is rather bitter. Here is
what I did to the source to make it compile:

1. A few explicit type casts

	o 1e-4 => float (in the call to Math::equal); false => int (in the
	  call to OpenBSpline::GetOriginal)

	o void** => const void** or char** to const char** in several
	  occassions of parameters passing and assignment.

2. Redeclaration of select() in accordance with IBM AIX.

I didn't cast void*/char* to const void*/const void* in parameter passing
because xlC, with flag -qlanglvl=compat, only gives warning for those
conversions ("requires a temporary"). Now, my changes are rather
innocent, aren't they? But look at my result: doc core-dumps, idraw
gives me a screenful window filled with vertical lines, and layout in
idemo is chaotic. The only programs I got working are logo, dclock, ifc,
and maybe alert and mailbox.

Previously I have built 3.1 alpha with my private port of AT&T C++ 2.0.
Although it may have problems with inlines, I basically got around and
the system is working fine. Now since I have moved on both parts (3.1
beta and IBM C++), I don't know which part to blame. Help me!

-Tom
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