"Hoehle, Joerg-Cyril" Joerg-Cyril.Hoehle@t-systems.com writes:

James Bielman writes:

...

Hmm, I've tried to install an x86 CLISP in a 32-bit chroot to prepare to implement and test this, but I'm a little concerned about the fact that MACHINE-TYPE still returns X86-64 on a 32-bit x86 build. Is there a better way to tell whether we are running an x86 or x86-64 CLISP?

I'm sorry, I don't understand what you observed, what you want or what you need. Feel free to elaborate.

Sorry... here's my train of thought: I wanted to support long long on CLISP either based on the version or whether it is built for a 64-bit target (amd64).

The problem is that I can't see any way to distinguish between a 32-bit CLISP and a 64-bit CLISP when running on an amd64:

;;; a 64-bit clisp: [jamesjb@phi ~] clisp -q -norc [1]> (integer-length most-positive-fixnum) 48 [2]> *features* (:READLINE :REGEXP :SYSCALLS :I18N :LOOP :COMPILER :CLOS :MOP :CLISP :ANSI-CL :COMMON-LISP :LISP=CL :INTERPRETER :SOCKETS :GENERIC-STREAMS :LOGICAL-PATHNAMES :SCREEN :FFI :GETTEXT :UNICODE :BASE-CHAR=CHARACTER :PC386 :UNIX) [3]> (machine-type) "X86_64" [4]>

;;; a 32-bit clisp: [jamesjb@phi ~] dchroot Executing shell in 'breezy32' chroot. [jamesjb@breezy32 ~] clisp -q -norc [1]> (integer-length most-positive-fixnum) 24 [2]> *features* (:REGEXP :SYSCALLS :I18N :LOOP :COMPILER :CLOS :MOP :CLISP :ANSI-CL :COMMON-LISP :LISP=CL :INTERPRETER :SOCKETS :GENERIC-STREAMS :LOGICAL-PATHNAMES :FFI :GETTEXT :UNICODE :BASE-CHAR=CHARACTER :PC386 :UNIX) [3]> (machine-type) "X86_64"

I can punt on this and just check the version, but I also would like to push CFFI-FEATURES:X86-64 onto *FEATURES* for a 64-bit CLISP, but I don't know how to reliably get that information (since MACHINE-TYPE returns "X86_64" even in a 32-bit CLISP and *FEATURES* doesn't have anything pertinent.)

The other Lisp implementations I have installed define MACHINE-TYPE to return the type of the target machine, instead of the actual machine---so a 32-bit SBCL returns "X86" even though the machine is actually an amd64 (although SBCL has :x86 / :x64-64 features so I don't need to depend on this behavior...)

James