New comment by tornaria on void-packages repository

https://github.com/void-linux/void-packages/issues/34849#issuecomment-1005176605

Comment:
I had success with the following patch
```
--- a/src/init-cl.lisp	2021-05-15 20:20:53.000000000 -0300
+++ b/src/init-cl.lisp	2022-01-04 17:45:03.838273626 -0300
@@ -574,8 +574,13 @@
 			 (delete-file file)))))
 	   *temp-files-list*))
 
+#+sbcl
+(eval-when (:compile-toplevel :load-toplevel :execute)
+  (require 'sb-gmp))
+
 (defun cl-user::run ()
   "Run Maxima in its own package."
+  #+sbcl (sb-gmp:install-gmp-funs)
   (in-package :maxima)
   (initialize-runtime-globals)
   (let ((input-stream *standard-input*)
```
Now maxima is automatically initialized using sb-gmp and arithmetic is fast:
```
$ rmaxima 
Maxima 5.45.1 https://maxima.sourceforge.io
using Lisp SBCL 2.2.0
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1) showtime : true $
Evaluation took 0.0001 seconds (0.0000 elapsed) using 0 bytes.
(%i2) a : 10^(10^5) $
Evaluation took 0.0017 seconds (0.0020 elapsed) using 13.516 KB.
(%i3) b : a^1280 $
Evaluation took 1.5245 seconds (1.5270 elapsed) using 50.689 MB.
(%i4) 
```
I want to try to fix an (unrelated) bug with the heap on maxima-ecl  (https://github.com/void-linux/void-packages/pull/34030#issuecomment-1005080267); I'll make a single PR with both.