On Wed, May 30, 2018 at 06:25:18PM +0200, cage wrote:
Hello!
I would like to help you but the fact is that ltk seem have some problem on my system:
an example as simple as this:
;; my package
(require 'ltk)
(defpackage :test (:use :common-lisp :ltk) (:export :main))
(in-package :test)
(defun main () (with-ltk () (let ((b (make-instance 'button :text "Hi!"))) (pack b))))
(main)
Launch an exception:
"When reading from tcl, expected a list but instead got FONTCONFIG"
After an investigation seems the problem was related to this line:
https://github.com/herth/ltk/blob/master/ltk/ltk.lisp#L464
The standard error from child process (wish) is captured and parsed from the parent process (lisp/ltk system); on my system (computer, not lisp system :-)) the program "fontconfig" complains about some missing configuration file, the actual message is:
"Fontconfig error: failed reading config file"
ltk try to parse this string and, of couse fails and this signal a condition.
My workaround has been change the line 464 of ltk.lisp:
#+:sbcl (let ((proc (sb-ext:run-program program args :input :stream :output :stream :wait wt :search t)))
with:
#+:sbcl (let ((proc (sb-ext:run-program program args :input :stream :output :stream :error nil :wait wt :search t)))
i.e. adding ":error nil"
This remove the problem but i am not sure this is a proper solution. I kindly ask the maintainer if he could check this issue.
Thanks in advance. C.