* etc/NEWS: In terminal-oriented subshells, the EMACS environment

variable now defaults to Emacs's absolute file name, instead of
to "t".
* etc/PROBLEMS: Adjust tcsh advice for this.
* make-dist (EMACS): Exit and fail if the EMACS environment
variable is set to something other than an absolute file name.
* lisp/comint.el (comint-exec-1): Set EMACS to the full name of Emacs,
not to "t".
* lisp/progmodes/compile.el (compilation-start): Likewise.
* lisp/progmodes/idlwave.el (idlwave-rescan-asynchronously):
Don't use expand-file-name on invocation-directory, since this
might mishandle special characters in invocation-directory.
* man/faq.texi (Escape sequences in shell output): EMACS is now set
to Emacs's absolute file name, not to "t".
(^M in the shell buffer): Likewise.
* man/misc.texi (Interactive Shell): Likewise.

ChangeLog

@@ -1,3 +1,8 @@
+2006-09-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* make-dist (EMACS): Exit and fail if the EMACS environment
+	variable is set to something other than an absolute file name.
+
 2006-09-07  Kim F. Storm  <storm@cua.dk>
 
 	* AUTHORS: Regenerate.

etc/ChangeLog

@@ -1,6 +1,13 @@
+2006-09-11  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* NEWS: In terminal-oriented subshells, the EMACS environment
+	variable now defaults to Emacs's absolute file name, instead of
+	to "t".
+	* PROBLEMS: Adjust tcsh advice for this.
+
 2006-09-10  Jan Dj,Ad(Brv  <jan.h.d@swipnet.se>
 
-	* PROBLEMS (are): Emacs compiled with Gtk+ crashes when closing a 
+	* PROBLEMS (are): Emacs compiled with Gtk+ crashes when closing a
 	display (x-close-connection).
 
 2006-09-02  Juri Linkov  <juri@jurta.org>

etc/NEWS

@@ -1434,6 +1434,10 @@ otherwise behaves quite similarly to the bash version.
 `comint-use-prompt-regexp'.  The old name has been kept as an alias,
 but declared obsolete.
 
++++
+*** The EMACS environment variable now defaults to Emacs's absolute
+file name, instead of to "t".
+
 ** M-x Compile changes:
 
 ---
@@ -1490,6 +1494,10 @@ it doesn't scroll the compilation output window.  If there is no left fringe,
 no arrow is displayed and a value of nil means display the message at the top
 of the window.
 
++++
+*** The EMACS environment variable now defaults to Emacs's absolute
+file name, instead of to "t".
+
 ** Occur mode changes:
 
 +++

etc/PROBLEMS

@@ -540,7 +540,7 @@ on the flag to output ^M at the end of each line.  You can fix the
 problem by adding this to your .cshrc file:
 
     if ($?EMACS) then
-        if ($EMACS == "t") then
+        if ("$EMACS" =~ /*) then
             unset edit
             stty  -icrnl -onlcr -echo susp ^Z
         endif

lisp/ChangeLog

@@ -1,3 +1,12 @@
+2006-09-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* comint.el (comint-exec-1): Set EMACS to the full name of Emacs,
+	not to "t".
+	* progmodes/compile.el (compilation-start): Likewise.
+	* progmodes/idlwave.el (idlwave-rescan-asynchronously):
+	Don't use expand-file-name on invocation-directory, since this
+	might mishandle special characters in invocation-directory.
+
 2006-09-12  Stefan Monnier  <monnier@iro.umontreal.ca>
 
 	* pcvs-defs.el: Remove * in defcustom's docstrings.

lisp/comint.el

@@ -765,7 +765,8 @@ buffer.  The hook `comint-exec-hook' is run after each exec."
 		    (format "COLUMNS=%d" (window-width)))
 	    (list "TERM=emacs"
 		  (format "TERMCAP=emacs:co#%d:tc=unknown:" (window-width))))
-	  (if (getenv "EMACS") nil (list "EMACS=t"))
+	  (unless (getenv "EMACS")
+	    (list (concat "EMACS=" invocation-directory invocation-name)))
 	  process-environment))
 	(default-directory
 	  (if (file-accessible-directory-p default-directory)

lisp/progmodes/compile.el

@@ -1068,7 +1068,8 @@ Returns the compilation buffer created."
 			      (window-width))))
 	      ;; Set the EMACS variable, but
 	      ;; don't override users' setting of $EMACS.
-	      (unless (getenv "EMACS") '("EMACS=t"))
+	      (unless (getenv "EMACS")
+		(list (concat "EMACS=" invocation-directory invocation-name)))
 	      (copy-sequence process-environment))))
 	(set (make-local-variable 'compilation-arguments)
 	     (list command mode name-function highlight-regexp))

make-dist

@@ -120,8 +120,7 @@ if [ ! -d src -o ! -f src/lisp.h -o ! -d lisp -o ! -f lisp/version.el ]; then
 fi
 
 ### Find where to run Emacs.
-### (We don't accept EMACS=t as an answer, since that probably only means
-### that the shell is running in an Emacs window.)
+### (Accept only absolute file names.)
 if [ $update = yes ];
 then
   unset EMACS_UNIBYTE
@@ -129,11 +128,15 @@ then
   then
     EMACS=`pwd`/src/emacs
   else
-    if [ "x$EMACS" = "x" -o "x$EMACS" = "xt" ];
-    then
-      echo You must specify the EMACS environment variable 2>&1
-      exit 1
-    fi
+    case $EMACS in
+      /*) ;;
+      *)
+	if [ ! -f "$EMACS" ]; then
+	  echo "$0: You must specify the EMACS environment variable " \
+	       "to an absolute file name." 2>&1
+	  exit 1
+	fi;;
+    esac
   fi
 fi
 

man/ChangeLog

@@ -1,3 +1,10 @@
+2006-09-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* faq.texi (Escape sequences in shell output): EMACS is now set
+	to Emacs's absolute file name, not to "t".
+	(^M in the shell buffer): Likewise.
+	* misc.texi (Interactive Shell): Likewise.
+
 2006-09-11  Richard Stallman  <rms@gnu.org>
 
 	* building.texi (Compilation Mode): Clarification.

man/faq.texi

@@ -2683,7 +2683,8 @@ shell init file.  You have two alternatives to solve this:
 @item
 Make the alias conditioned on the @code{EMACS} variable in the
 environment.  When Emacs runs a subsidiary shell, it exports the
-@code{EMACS} variable with the value @code{t} to that shell.  You can
+@code{EMACS} variable to that shell, with value equal to the absolute
+file name of Emacs.  You can
 unalias @code{ls} when that happens, thus limiting the alias to your
 interactive sessions.
 
@@ -2753,7 +2754,7 @@ file:
 
 @example
 if ($?EMACS) then
-    if ("$EMACS" == t) then
+    if ("$EMACS" =~ /*) then
         if ($?tcsh) unset edit
         stty nl
     endif

man/misc.texi

@@ -488,7 +488,8 @@ Coding}.
 
 @cindex @env{EMACS} environment variable
   Unless the environment variable @env{EMACS} is already defined,
-Emacs defines it in the subshell, with value @code{t}.  A shell script
+Emacs defines it in the subshell, with value equal to Emacs's absolute
+file name.  A shell script
 can check this variable to determine whether it has been run from an
 Emacs subshell.
 

src/config.in

@@ -124,6 +124,10 @@ Boston, MA 02110-1301, USA.  */
    don't. */
 #undef HAVE_DECL_SYS_SIGLIST
 
+/* Define to 1 if you have the declaration of `tzname', and to 0 if you don't.
+   */
+#undef HAVE_DECL_TZNAME
+
 /* Define to 1 if you have the declaration of `__sys_siglist', and to 0 if you
    don't. */
 #undef HAVE_DECL___SYS_SIGLIST
@@ -796,7 +800,7 @@ Boston, MA 02110-1301, USA.  */
 
 /* If using the C implementation of alloca, define if you know the
    direction of stack growth for your system; otherwise it will be
-   automatically deduced at run-time.
+   automatically deduced at runtime.
 	STACK_DIRECTION > 0 => grows toward higher addresses
 	STACK_DIRECTION < 0 => grows toward lower addresses
 	STACK_DIRECTION = 0 => direction of growth unknown */