Some variants, like emacs-no-x, come with a reduced set of preloaded symbols,
so don't expect them to always be native.
* gnu/packages/aux-files/emacs/comp-integrity.el (expect-native-if-bound): New
function.
(x-setup-function-keys, dynamic-setting-handle-config-changed-event)
(fontset-plain-name, fringe-mode, image-type, regexp-opt, scroll-bar-scale):
Use ‘expect-native-if-bound’.
(x-handle-no-bitmap-icon): Likewise, was already conditional.
In the previous commit, we've added a patch that potentially messes with
how built-in (especially preloaded) Lisp libraries are loaded. Thus, we
might want to assert that these files still load fine, as reported when
querying the builtin documentation of functions provided by them.
* gnu/packages/aux-files/emacs/comp-integrity.el: New file.
* gnu/Makefile.am (dist_noinst_DATA): Register it here.
* gnu/packages/emacs.scm (emacs-no-x)[#:phases]: Add ‘validate-comp-integrity’.
