Re: [Gnucap-devel] Build failure with version 2007-08-20

[David Fang]

> > Back to the 3.3 issue ... I need to decide where to draw the line on 
> > supporting old compilers.  Using an enum here is no problem.  If that was 
> > all that is needed, I would do it.  I have concerns about the other 
> > problems with g++-3.3, particularly the stack overflow, which happens on 
> > both 32 and 64 bit systems.  (Actually, all of the mentioned problems 
> > happen both on an AMD-64 and Intel-32.)

Hi,
	I'm getting a different (?) issue with 
powerpc-apple-darwin8-gcc-3.3 where a few generated model files
(d_mos5, d_mos8) crash the compiler with:

cc1plus(1685) malloc: *** vm_allocate(size=2210779136) failed (error 
code=3)
cc1plus(1685) malloc: *** error: can't allocate region
cc1plus(1685) malloc: *** set a breakpoint in szone_error to debug

The culprit seems to be the massive switch-case statements in 
MODEL::set_param_by_index(...) and friends.  Does this occur on other 
gcc-3.3's, or is it just Apple's?  (I'll hunt around for other gcc-3.3s..)
Might it be posssible to convert this to a function table?

> any conclusions on this?  Unfortunately most of the computers I use have 
> gcc-3.2 or gcc-3.3.

If I can get it to compile, what needs to be done to reproduce the 
stack-overflow?  (Test case +instructions?)

IMHO, gcc-3.3 is still a good compiler to support, but I personally draw 
the line at 3.2 because of C++ front-end bugs I've encountered.


David Fang
Computer Systems Laboratory
Electrical & Computer Engineering
Cornell University
http://www.csl.cornell.edu/~fang/
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