Add posframe for flymake errors in gui mode

init.el

@@ -392,6 +392,9 @@ visual states."
 ;; popup.el
 (use-package popup)
 
+;; popwin
+(use-package posframe)
+
 ;; flymake
 (use-package flymake
   :bind (:map flymake-mode-map
@@ -405,7 +408,16 @@ visual states."
              (diag (and flymake-mode
                         (get-char-property pos 'flymake-diagnostic)))
              (message (flymake--diag-text diag)))
-        (popup-tip message))))
+        (if (display-graphic-p)
+            (progn
+              (posframe-show " *flymake-error-posframe*"
+                             :string message
+                             :position (point)
+                             :max-width 80)
+              (clear-this-command-keys)
+              (push (read-event) unread-command-events)
+              (posframe-hide " *flymake-error-posframe*"))
+          (popup-tip message)))))
 
 ;; eldoc
 (use-package eldoc