steve@mepis1:~/Desktop$ ls -al test*
-rw-r--r-- 1 steve users 97 Jun  7 11:10 test2.scm
-rw-r--r-- 1 root  root  97 Jun  7 11:03 test.scm
steve@mepis1:~/Desktop$ gsc -exe test.scm
steve@mepis1:~/Desktop$ ls -al test*
-rwxr-xr-x 1 steve users 5449050 Jun  7 11:18 test
-rw-r--r-- 1 steve users      97 Jun  7 11:10 test2.scm
-rw-r--r-- 1 root  root       97 Jun  7 11:03 test.scm
steve@mepis1:~/Desktop$ gsc -exe -e '(set! c#targ-tree-shake? #t)'  test2.scm
steve@mepis1:~/Desktop$ ls -al test*
-rwxr-xr-x 1 steve users 5449050 Jun  7 11:18 test
-rwxr-xr-x 1 steve users 5449057 Jun  7 11:19 test2
-rw-r--r-- 1 steve users      97 Jun  7 11:10 test2.scm
-rw-r--r-- 1 root  root       97 Jun  7 11:03 test.scm
steve@mepis1:~/Desktop$ ./test
123
steve@mepis1:~/Desktop$
 ./test2
123
steve@mepis1:~/Desktop$ 

So, they both execute, but the tree shaking didn't seem to do much.

Any thoughts?

Thanks, Steve 

root@mepis1:/opt/gambit# cat test.scm
(define (block))

(define (f x)
  (+ (* x x)
     (- x 1)))

(define (g y)
  (f (f y)))

(pp 123)

root@mepis1:/opt/gambit# gsc test.scm
*** ERROR IN "/opt/gambit/test.scm"@1.1 -- Ill-formed special form: define
root@mepis1:/opt/gambit# gsc -e '(set! c#targ-tree-shake? #t)' test.scm
*** ERROR IN (string)@1.1 -- Unbound variable: c#targ-tree-shake?

Any ideas?

Thanks, Steve