MacPorts and Gambit-C

Written by Ben on May 22, 2007 |

The Gambit-C MacPorts Portfile was finally committed a couple days ago, and I just got around to trying it out. Just do a `sudo port -d selfupdate`, and `port install gambit-c`. Worked like a charm! Great Job Arto!

Just a few notes about the installation for those that are trying out the examples from the Gambit-C user manual:

• gsc needs “-l /opt/local/lib/gambit-c/_gambc” when generating link files.
• Pass the following to gcc for gambit.h: -I/opt/local/include

Using an example taken from the users manual:

Here is for example how a program with three modules (one in C and
two in Scheme) can be built. The content of the three source files
(`m1.c’, `m2.scm’ and `m3.scm’) is:

/* File: “m1.c” */
int power_of_2 (int x) { return 1<<x; }

; File: “m2.scm”
(c-declare “extern int power_of_2 ();”)
(define pow2 (c-lambda (int) int “power_of_2″))
(define (twice x) (cons x x))

; File: “m3.scm”
(write (map twice (map pow2 ‘(1 2 3 4)))) (newline)

The compilation of the two Scheme source files can be done with
three invocations of `gsc’:

$ gsc -c m2.scm # create m2.c (note: .scm is optional)
$ gsc -c m3.scm # create m3.c (note: .scm is optional)
$ gsc -link m2.c m3.c # create the incremental link file m3_.c

We, instead, use the following command lines:

# optional compile into C files.
$ gsc -c m2.scm # create m2.c (note: .scm is optional)
$ gsc -c m3.scm # create m3.c (note: .scm is optional)
# creates the link file (m3_.c) and creates m1.c m2.c if they don’t exist.
$ gsc -link -l /opt/local/lib/gambit-c/_gambc m2 m3
# Compiles the code into a.out
gcc -I/opt/local/include m1.c m2.c m3.c m3_.c -L/opt/local/lib/gambit-c -lgambc

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Posted in OpenSource, Technology