Add flycheck configuration

myconfig.org

@@ -556,7 +556,7 @@ Quick navigation to words
   - [[https://github.com/joaotavora/yasnippet][yasnippet]] (there are many tutorials)
   - [[https://github.com/abo-abo/auto-yasnippet][auto-yasnippet]] (disposable snippets)
   - [[https://github.com/AndreaCrotti/yasnippet-snippets][yasnippets-snippets]]
-  Place your own snippets on =~/.cache/emacs/etc/yasnippet/snippets=
+Place your own snippets on =~/.cache/emacs/etc/yasnippet/snippets=
   #+begin_src emacs-lisp
     (use-package yasnippet
       :init
@@ -569,7 +569,8 @@ Quick navigation to words
   #+end_src
 
 * company
-  Autocompletion with [[https://company-mode.github.io/][company]]
+Autocompletion with [[https://company-mode.github.io/][company]]
+*Remember*: =company-lsp= is deprecated, don't use it.
   #+begin_src emacs-lisp
     (use-package company
       :init
@@ -607,7 +608,7 @@ Quick navigation to words
 
 * org-mode
 ** org-bullets
-   Nice bullets for org-mode
+Nice bullets for org-mode
    #+begin_src emacs-lisp
      (use-package org-bullets
        :config
@@ -615,6 +616,19 @@ Quick navigation to words
        )
    #+end_src
 
+* flycheck
+You *must* use [[https://www.flycheck.org/en/latest/][flycheck]] if you use LSP. (Flymake + LSP is hell) 
+Syntax checking for programming languages
+  #+begin_src emacs-lisp
+    (use-package flycheck
+      :config
+      (global-set-key  (kbd "C-c f p") 'flycheck-previous-error)
+      (global-set-key  (kbd "C-c f n") 'flycheck-next-error)
+      :init
+      (global-flycheck-mode t)
+      )
+  #+end_src
+   
 * LSP
   We are using [[https://emacs-lsp.github.io/lsp-mode/][lsp-mode]] but keep an eye on [[https://github.com/joaotavora/eglot][eglot]] as an alternative.
   **WARNING**: =lsp-company= is no longer supported