Check executable-find supports optional REMOTE argument.

flycheck.el

@@ -86,6 +86,7 @@
 ;; Declare a bunch of dynamic variables that we need from other modes
 (defvar sh-shell) ; For shell script checker predicates
 (defvar ess-language) ; For r-lintr predicate
+(defvar executable-find) ; For flycheck-executable-find
 (defvar markdown-hide-markup) ;
 (defvar markdown-fontify-code-block-default-mode) ; For rust-error-explainer
 (defvar markdown-fontify-code-blocks-natively) ;
@@ -517,10 +518,14 @@ and EXECUTABLE contains a directory component, expands to a full
 path and tries invoking `executable-find' again."
  ;; file-name-directory returns non-nil iff the given path has a
  ;; directory component.
- (or
- (executable-find executable t)
- (when (file-name-directory executable)
- (executable-find (expand-file-name executable) t))))
+ (let ((executable-find-fn #'(lambda (executable)
+ (if (version< emacs-version "27.1")
+ (executable-find executable)
+ (executable-find executable t)))))
+ (or
+ (funcall executable-find-fn executable)
+ (when (file-name-directory executable)
+ (funcall executable-find-fn (expand-file-name executable))))))
 
 (defcustom flycheck-indication-mode 'left-fringe
  "The indication mode for Flycheck errors.