Re: compile mode and $EMACS

[Xue Fuqiao]

On Sun, Aug 11, 2013 at 12:47 AM, Sebastian Wiesner <address@hidden> wrote:
> Hello,
>
> I just discovered that compile mode adds "EMACS=t" to the process
> environment (see "compilation-start").
>
> What is this variable for?  How is it supposed to be interpreted by
> the invoked program?  Which programs do actually use it?

In (info "(emacs) Interactive Shell"):

     Emacs sets the environment variable `INSIDE_EMACS' in the subshell
  to `VERSION,comint', where VERSION is the Emacs version (e.g., `24.1').
  Programs can check this variable to determine whether they are running
  inside an Emacs subshell.  (It also sets the `EMACS' environment
  variable to `t', if that environment variable is not already defined.
  However, this environment variable is deprecated; programs that use it
  should switch to using `INSIDE_EMACS' instead.)

-- 
Best regards, Xue Fuqiao.
http://www.gnu.org/software/emacs/