(compilation-start): Set EMACS and INSIDE_EMACS to t.

1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/progmodes/compile.el b/lisp/progmodes/compile.el
index 15346be53c7..cc1fe1ef827 100644
--- a/lisp/progmodes/compile.el
+++ b/lisp/progmodes/compile.el
@@ -1069,7 +1069,8 @@ Returns the compilation buffer created."
               ;; Set the EMACS variable, but
               ;; don't override users' setting of $EMACS.
               (unless (getenv "EMACS")
-                (list (concat "EMACS=" invocation-directory invocation-name)))
+                (list "EMACS=t"))
+              (list "INSIDE_EMACS=t")
               (copy-sequence process-environment))))
         (set (make-local-variable 'compilation-arguments)
              (list command mode name-function highlight-regexp))