spacemacs layer summary

gtags 注意事项

     helm
     gtags
     (c-c++ :variables
            c-c++-default-mode-for-headers 'c++-mode
            c-c++-enable-clang-support t)
     auto-completion
     better-defaults
     emacs-lisp
     git
     ;; markdown
     org
     python
     ycmd
     yasnippet
     ;;company-irony
     (shell :variables
             shell-default-height 30
             shell-default-position 'bottom)
     spell-checking
     syntax-checking
     ;; version-control
     ipython-notebook
     imenu-list
原来gtags并不主动识别.h 中的C++类，除非设置GTAGSFORCECPP 环境变量
export GTAGSFORCECPP=1