* lisp/emacs-lisp/comp.el (comp-ensure-native-compiler): Use
`featurep' to identify if the native compiler is available.
* lisp/emacs-lisp/nadvice.el (advice--add-function): Likewise.
* lisp/emacs-lisp/package.el (package--delete-directory): Likewise.
* lisp/loadup.el: Likewise.
* src/comp.c (syms_of_comp): Provide feature nativecomp.
* lisp/emacs-lisp/comp.el (comp-trampoline-compile): Try to create
the eln-cache dir if this is not existing, if fails to do that
move on to the next one.
* lisp/emacs-lisp/comp.el (comp-spill-lap-function): Use
`cl-defmethod' where correct in place of `cl-defgeneric'.
(comp-tampoline-compile): Add missing #.
The testsuite does large use of primitive redefinition, to avoid that
we define `advice-flet' to use instead as an easy `cl-letf'
replacement.
* lisp/emacs-lisp/nadvice.el (advice-flet): New macro.
* lisp/emacs-lisp/comp.el (comp-tampoline-compile): Do not crash
if we can't write in the first entry in `comp-eln-load-path' but
search for another one.
* doc/lispref/loading.texi (Autoload): Document change of name
(bug#39823).
* lisp/emacs-lisp/autoload.el (autoload-find-generated-file): Pass
the file name in.
(autoload-generated-file): Ditto.
(autoload-file-load-name): Ditto.
(generate-file-autoloads): Ditto.
(autoload--setup-output): Ditto.
(autoload-generate-file-autoloads): Ditto, and alter doc string to
reflect when `generated-autoload-file' is heeded.
(update-file-autoloads): Pass outfile in to functions.
(autoload-find-destination): Ditto.
(update-directory-autoloads): Make into an obsolete shim around
`make-directory-autoloads'.
(make-directory-autoloads): Renamed from
`update-directory-autoloads' with new semantics.
(batch-update-autoloads): Adjust caller.
* lisp/emacs-lisp/package.el (package-generate-autoloads): Adjust
caller.
* lisp/emacs-lisp/backtrace.el (backtrace--to-string): New function.
(backtrace-to-string): Use it. Fix whitespace (bug#40728).
* lisp/emacs-lisp/debug.el (debugger-insert-backtrace): New function.
Mark it as obsolete.
(debugger-toggle-locals, debug-help-follow): New aliases.
* lisp/epa-file.el (epa-file--find-file-not-found-function): Do a
user-error when there's a wrong password (bug#43704).
(epa--wrong-password-p): New function.
(epa-file-insert-file-contents): Use it, and stash the error away
for later signalling.
* lisp/emacs-lisp/subr-x.el (if-let): Autoload.
* lisp/emacs-lisp/autoload.el (update-directory-autoloads):
.eln files have been moved so remove the '.eln' match.
* lisp/emacs-lisp/bytecomp.el (byte-compile-refresh-preloaded):
Likewise.
* lisp/emacs-lisp/find-func.el (find-library-suffixes): Clean-up
as '.eln' is no more in `load-suffixes'.
* lisp/help-fns.el (find-lisp-object-file-name): Clean-up as
`symbol-file' will return the '.elc' file.
* src/lread.c (Fget_load_suffixes): Remove logic as '.eln' is not
anymore in load-suffixes.
(openp): Two spaces.
* src/comp.c (syms_of_comp): Define and initialize
'Vcomp_installed_trampolines_h'.
(Fcomp__install_trampoline): Fill 'Vcomp_installed_trampolines_h'
* lisp/emacs-lisp/comp.el (comp--subr-safe-advice): Make use of
`comp-installed-trampolines-h' to guard against installing a
trampoline twice.
Add a Lisp side entry-point to be called to make primitive adivicing
effective.
* lisp/emacs-lisp/comp.el (comp-trampoline-sym)
(comp-trampoline-filename): New substs.
(comp-make-lambda-list-from-subr, comp-search-trampoline)
(comp-tampoline-compile): New functions
* lisp/emacs-lisp/lisp.el (forward-sexp, backward-sexp, forward-list)
(backward-list, down-list, up-list, mark-sexp, kill-sexp)
(backward-kill-sexp): Remove unsightly scan-error when running
interactively and no further movement by sexp can be made (bug#43489).
