> A workaround (that would temporarily loose wxMaxima's ability to set
> maxima's current working directory until a fix is found) would be
> deleting the line from the affected file that reads:
> #+gcl (si:chdir dir)
> Will fix the bug as soon as someone finds out how.
Hi,
I think you just have to add a colon:
Change
#+gcl (si:chdir dir)
into
#+gcl (si::chdir dir)
On my system, the error message vanishes and I can call the "wxcd"
function from within maxima (maxima appears to work normally, too):
:lisp (wx-cd "/usr/lib/");
/usr/lib/
I think the bug is caused because in newer versions of gcl, "chdir"
is still defined in the "si" package, but isn't exported---meaning that
it does not belong to the public part of the API of the package which
is accessible from other packages by calling it with the package name
and a one colon qualifier. Using two colons makes it possible to
access any symbol in a package[1].
I believe it's a bug in gcl (I'm not a Lisper).
On a Debian Stable box, I get the following result when calling
"si:chdir":
icafe@cafe2016:~$ gcl
GCL (GNU Common Lisp) 2.6.12 CLtL1 Oct 28 2014 10:02:30
Source License: LGPL(gcl,gmp), GPL(unexec,bfd,xgcl)
Binary License: GPL due to GPL'ed components: (XGCL READLINE UNEXEC)
Modifications of this banner must retain notice of a compatible license
Dedicated to the memory of W. Schelter
Use (help) to get some basic information on how to use GCL.
Temporary directory for compiler files set to /tmp/
>(si:chdir "/home")
"/home"
Doing the same on Debian Unstable:
toto@talkietoaster: ~ $ /usr/bin/gcl
[12:34:07]
GCL (GNU Common Lisp) 2.6.12 CLtL1 Fri Apr 22 15:51:11 UTC 2016
Source License: LGPL(gcl,gmp), GPL(unexec,bfd,xgcl)
Binary License: GPL due to GPL'ed components: (XGCL READLINE UNEXEC)
Modifications of this banner must retain notice of a compatible license
Dedicated to the memory of W. Schelter
Use (help) to get some basic information on how to use GCL.
Temporary directory for compiler files:
/tmp/
>(si:chdir "/home")
Error: ERROR "Cannot find the external symbol CHDIR in #<\"SYSTEM\" package>."
Fast links are on: do (si::use-fast-links nil) for debugging
Signalled by SYSTEM::GCL-TOP-LEVEL.
ERROR "Cannot find the external symbol CHDIR in #<\"SYSTEM\" package>."
Broken at SYSTEM::GCL-TOP-LEVEL. Type :H for Help.
1 Return to top level.
>>1
Top level.
>(si::chdir "/home")
#p"/home/"
I can fix this by manually exporting "chdir":
>(in-package :si)
#<"SYSTEM" package>
SYSTEM>(export 'chdir)
T
SYSTEM>(in-package "COMMON-LISP-USER")
#<"COMMON-LISP-USER" package>
>(si:chdir "/home")
#p"/home/"
The output is somewhat different, "/home/" vs. #p"/home/". I don't
know if that's important.
Toto
Footnotes:
[1] Peter Seibel: Practical Common Lisp, chapter 21, page 264
(http://www.gigamonkeys.com/book/programming-in-the-large-packages-and-symbols.html)
