Unconditionally reset load-path after dumping

* src/lread.c: (dump_path): Remove.
(load-path-default): Remove `changed' argument.
Do not set dump_path permanently.  Simplify.
(init_lread): Simplify.
(syms_of_lread): Remove dump_path.

* lisp/loadup.el (load-path): Warn if site-load or site-init changes it.
No more need to reset it when bootstrapping.

* doc/lispref/internals.texi (Building Emacs):
* doc/lispref/loading.texi (Library Search): Mention that site-load,
site-init cannot change load-path.

* INSTALL: No longer mention load-path and site-init/site-load.

* etc/NEWS: Mention this.

Fixes: debbugs:16107

1 files changed, 6 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 3538eddb968..f4fc27d0562 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -77,6 +77,12 @@ was replaced by ".", so use an explicit "." now if that is what you want.)
 will instead append, if the argument begins with `:' (or `;' on MS Windows;
 i.e., `path-separator').
 
++++
+** If you use either site-load.el or site-init.el to customize the dumped
+Emacs executable, any changes to `load-path' that these files make
+will no longer be present after dumping.  To affect a permanent change
+to `load-path', use the `--enable-locallisppath' option of `configure'.
+
 
 * Changes in Emacs 24.4