Re: help with dynamic-space-size

Greg Bennett <[email protected]> writes:

> Thanks for this Andre'.   emacs tells me
>
> user-init-file is a variable defined in ‘C source code’.
>
> Its value is "/home/gwbennett/.emacs.d/init.el"
>
> Here are its current contents:
> (load (expand-file-name "~/quicklisp/slime-helper.el"))
> (setq inferior-lisp-program "sbcl --dynamic-space-size 3072")
>
> Starting emacs and evaluating (/ (dynamic-space-size) (expt 1024 3)) returns 1
> rather than 3

Perhaps the issue is inferior-lisp-program doesn't handle CLI options
gracefully.

Try setting slime-lisp-implementations as below:

(setq slime-lisp-implementations `((my-sbcl ("sbcl" "--dynamic-space-size" "3072"))))

Then you should be able to choose the my-sbcl implementation when
issuing the slime command from Emacs.  The command may require a prefix
arg, I can't be precise since I use SLY instead of Slime (just use
Emacs' describe-symbol command to inspect the slime command).

By the way, another way to achieve this goal is to add the following to
your .sbclrc file.

--8<---------------cut here---------------start------------->8---
;; An alternative to starting sbcl via sbcl --dynamic-space-size <megabytes>.

(sb-alien:define-alien-variable
    ("dynamic_space_size" *sbcl%dynamic-space-size*)
  sb-alien:unsigned)

(defconstant +MB+ (expt 1024 2))

(setf *sbcl%dynamic-space-size* (* 3072 +MB+))
--8<---------------cut here---------------end--------------->8---


-- 
André A. Gomes
"You cannot even find the ruins..."


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