Snippet to fix colors in emacs compile buffer.

ansi_color.el

;; ansi-color.
;; https://emacs.stackexchange.com/questions/8135/why-does-compilation-buffer-show-control-characters
(use-package ansi-color
  :ensure t
  :config (progn 
            (defun my/ansi-colorize-buffer ()
              (let ((buffer-read-only nil))
                (ansi-color-apply-on-region (point-min) (point-max))))
            (add-hook 'compilation-filter-hook 'my/ansi-colorize-buffer)))