Re: Windows Emacs shell/shell fail to execute ack perl script(locale error)

[Oleksandr Gavenko]

On 2013-01-11, Vin Che wrote:

> Typing this command on regular cmd.exe or cygwin termal gives me results as
> expected:
>
>     $ ack hello
>
> (I have ack.bat that execute ack.pl in my PATH)
>
> However, when I run the same command from either shell or eshell in Emacs,
> it gives me this error:
>
>
>     c:\Users\Martin>"C:\cygwin\bin\perl" /cygdrive/c/Users/Martin/Desktop/
> ack.pl hello
>     perl: warning: Setting locale failed.
>     perl: warning: Please check that your locale settings:
>     LC_ALL = (unset),
>     LANG = "ENU"
>         are supported and installed on your system.
>     perl: warning: Falling back to the standard locale ("C").
>
> I tried to fix it by SETENV both variable to en_US.UTF-8 but when I run it
> again, it gave me no result but froze.

Try:

  (setenv "LC_ALL" "C")
  (setenv "LANG" "C")

What is "ENU" locale ??

From:

  http://perldoc.perl.org/perllocale.html

  You may encounter the following warning message at Perl startup:

      perl: warning: Setting locale failed.
      perl: warning: Please check that your locale settings:
      LC_ALL = "En_US",
      LANG = (unset)
      are supported and installed on your system.
      perl: warning: Falling back to the standard locale ("C").

  This means that your locale settings had LC_ALL set to "En_US" and LANG exists
  but has no value. Perl tried to believe you but could not. Instead, Perl gave
  up and fell back to the "C" locale, the default locale that is supposed to
  work no matter what. This usually means your locale settings were wrong, they
  mention locales your system has never heard of, or the locale installation in
  your system has problems (for example, some system files are broken or
  missing). There are quick and temporary fixes to these problems, as well as
  more thorough and lasting fixes.

Another valuable answer:

  
http://stackoverflow.com/questions/2499794/how-can-i-fix-a-locale-warning-from-perl

For example I use such code:

  (when (eq system-type 'windows-nt)
    (ignore-errors
      (require 'cygwin-mount)
      (cygwin-mount-activate)
      )
    (add-hook 'find-file-hook 'follow-cygwin-symlink)
    ;; Workaround for Cygwin shell, when set 'CYGWIN=noglob'. By default 
'shell-quote-argument'
    ;; quoted by double '\' chars this cause failure.
    (defun shell-quote-argument (argument)
      (concat "'" argument "'")
      )
    ;; Workaround for Cygwin when 'shell-file-name' is 'bash'.
    (setq null-device "/dev/null")
    ;; Use shell from Cygwin/MinGW.
    (setq shell-file-name "bash")
    (setenv "SHELL" "/bin/bash")
    (modify-coding-system-alist 'process "bash" '(cp1251-unix . cp1251-unix))
    )

  ;; I prefer EN man pages.
  (when (memq system-type '(windows-nt cygwin))
    (setq manual-program "LANG=C man")
    )

in which I turn man into LANG=C... The trick work as I use "bash" command line
interpreter under Windows.

-- 
Best regards!