Moving to Doom Emacs!

.emacs.d/modules/tools/flycheck/autoload.el

@@ -0,0 +1,13 @@
+;;; tools/flycheck/autoload.el -*- lexical-binding: t; -*-
+
+;;;###autoload
+(defun +flycheck-init-popups-h ()
+  "Activate `flycheck-posframe-mode' if available and in GUI Emacs.
+Activate `flycheck-popup-tip-mode' otherwise.
+Do nothing if `lsp-ui-mode' is active and `lsp-ui-sideline-enable' is non-nil."
+  (unless (and (bound-and-true-p lsp-ui-mode)
+               lsp-ui-sideline-enable)
+    (if (and (fboundp 'flycheck-posframe-mode)
+             (display-graphic-p))
+        (flycheck-posframe-mode +1)
+      (flycheck-popup-tip-mode +1))))