Enable GDB many windows

gdb-many-windows enables an IDE like debugger frontend for Emacs.

contrib/!lang/c-c++/packages.el

@@ -19,6 +19,7 @@
     company-c-headers
     company-ycmd
     flycheck
+    gdb-mi
     helm-gtags
     semantic
     srefactor
@@ -113,6 +114,16 @@
 (defun c-c++/post-init-flycheck ()
   (add-to-hooks 'flycheck-mode '(c-mode-hook c++-mode-hook)))
 
+(defun c-c++/init-gdb-mi ()
+  (use-package gdb-mi
+    :defer t
+    :init
+    (setq
+     ;; use gdb-many-windows by default when `M-x gdb'
+     gdb-many-windows t
+     ;; Non-nil means display source file containing the main routine at startup
+     gdb-show-main t)))
+
 (defun c-c++/post-init-helm-gtags ()
   (spacemacs/helm-gtags-define-keys-for-mode 'c-mode)
   (spacemacs/helm-gtags-define-keys-for-mode 'c++-mode))