Fix semantics of let-binding `process-environment'.

* lisp/env.el: Require cl for byte compilation. (For `block' and `return'.)
  (read-envvar-name): Update for rename.  Include `process-environment'
  as well.
  (setenv): Update for rename also handle `process-environment'.  Update doc.
  (getenv): Update doc.
  (environment): New function.
  (let-environment): New macro.

* lisp/font-lock.el (lisp-font-lock-keywords-2): Add `let-environment'.

* src/callproc.c (Vglobal_environment): New variable, taking over the
  previous role of `Vprocess_environment', which is now something else.
  (add_env): New function.
  (child_setup): Use it.
  (child_setup, getenv_internal): Rename Vprocess_environment to
  Vglobal_environment.  Handle the new Vprocess_environment.
  (Fgetenv_internal, egetenv): Update doc.
  (set_process_environment): Rename to `set_global_environment'.  Rename
  Vprocess_environment to Vglobal_environment.
  (syms_of_callproc): Rename process-environment to global-environment,
  add new process-environment, update docs.

* src/emacs.c (main): Call set_global_environment instead of
  set_process_environment.

* fileio.c (Fread_file_name): Update comment.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-465

1 files changed, 1 insertions, 1 deletions

diff --git a/src/fileio.c b/src/fileio.c
index 4e9ac9541c3..add62fe5426 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -6335,7 +6335,7 @@ and `read-file-name-function'.  */)
   /* If dir starts with user's homedir, change that to ~. */
   homedir = (char *) egetenv ("HOME");
 #ifdef DOS_NT
-  /* homedir can be NULL in temacs, since Vprocess_environment is not
+  /* homedir can be NULL in temacs, since Vglobal_environment is not
      yet set up.  We shouldn't crash in that case.  */
   if (homedir != 0)
     {