It does look like a bug as far I can see, they try to convert a void* (64 bits) to a Standard_Integer (32 bits says the OCC doc) and that will not work.
Archived discussion
Standard_Integer too small on x86_64...
Hi all,
I've been struggling with compiling OCC on 64bit Ubuntu for a few days and finally made serious headway after applying Jason Kraftcheck's patches ( http://www.opencascade.org/org/forum/thread_12563/ .) Unfortunately I've run into these 2 instances (so far) of void pointers being cast as standard ints in OCC. Here are the errors I got after 3 hours of compilation:
../../../src/Draw/Draw_VariableCommands.cxx: In function 'char* tracevar(void*, Tcl_Interp*, char*, char*, Standard_Integer)':
../../../src/Draw/Draw_VariableCommands.cxx:661: error: cast from 'void*' to 'Standard_Integer' loses precision
../../../src/Draw/Draw_VariableCommands.cxx: In static member function 'static Handle_Draw_Drawable3D Draw::Get(char*&, Standard_Boolean)':
../../../src/Draw/Draw_VariableCommands.cxx:776: error: cast from 'void*' to 'Standard_Integer' loses precision
Does anyone know a definitive fix for this issue? Why have other 64 bit users not encountered the same problem? Thanks in advance for any advice!
-Seth
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is this something people out there have fixed before? it seems to me that anyone with a 64bit build would have run into this.
so, i just changed them.
Maybe these should be Standard_Address (which is typedef void*) instead of Standard_Integer's.
that makes sense. i used longs, because on my system they're 64 bit, which isn't a good solution, but it worked.
Anybody compared the performance of 64 - bit and 32 bit version
on a common h/w platform .. r there any bench mark results ?
I'm going to try to mark useful posts that have patches provided like so
OCCPATCH
so I can find them later for my patch repository using the forum search function. Hope nobody minds.
Pete