[Sbcl-help] Compiling an alternate default dynamic space size

[Benjamin L. <ben...@cm...>]

Dear SBCL folks,

I've been very much enjoying writing SBCL "shebang" scripts lately.   
This has spared me much suffering over Shell and Perl scripts.  But  
I've just run into a situation where I'm running out of memory because  
the max heap size is too small.

I see here that I can't combine "--script" and "--dynamic-space-size":
http://sourceforge.net/mailarchive/message.php?msg_id=20081222225629.GA25816%40cons.org

But, I see here that there should be a way to compile a larger default  
dynamic space size into SBCL:
http://sourceforge.net/mailarchive/message.php?msg_id=87d4a1cfn4.fsf%40gmail.com
That says says "you can recompile sbcl with DEFAULT_DYNAMIC_SPACE_SIZE  
changed in sbcl/src/runtime/validate.h"

However, when I look at validate.h, I see that  
DEFAULT_DYNAMIC_SPACE_SIZE, is calculated from two other variables  
(either "DYNAMIC_SPACE_END - DYNAMIC_SPACE_START", or  
"DYNAMIC_0_SPACE_END - DYNAMIC_0_SPACE_START")

Can I set this directly, (e.g. "define DEFAULT_DYNAMIC_SPACE_SIZE  
16000"), or would I need to do something to change the  
DYNAMIC_SPACE_END variable?

Thanks,
Ben


--
Benjamin Lambert
Ph.D. Student of Computer Science
Carnegie Mellon University
www.cs.cmu.edu/~belamber