Emacs as C++ IDE
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this blog will make your emacs as C++ IDE. It implements code-completion, google-style-check and project manager.
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Table of Contents
1 auto completion
1.1 auto-completion
(require 'auto-complete)
(require 'auto-complete-config)
(ac-config_default)
Auto-completion is a basic plugin. When you input the existed string in a file, emacs will give your some tips.
1.2 yasnippet
(require 'yasnippet)
(yas-global-mode 1)
Yasnnipet is used to complete your code with code-fragments. For example, when you input "for"and press tab in a cpp file, code will be automatically completed as below:
for (i = 0; i < N; i++) {
}
1.3 auto-complete-c-headers
(defun my:ac-c-header-init()
(require 'auto-complete-c-headers)
(add-to-list 'ac-sources 'ac-source-c-headers)
(add-to-list 'achead:include-directories '(("/usr/include/c++/4.8")
("/usr/include/x86_64-linux-gnu/c++/4.8")
("/usr/include/c++/4.8/backward")
("/usr/lib/gcc/x86_64-linux-gnu/4.8/include")
("/usr/local/include")
("/usr/lib/gcc/x86_64-linux-gnu/4.8/include-fixed")
("/usr/include"))))
(add-hook 'c++-mode-hook 'my:ac-c-header-init)
(add-hook 'c-mode-hook 'my:ac-c-header-init)
The "achead:include-directories"are my configuration. The include-directories vary with different systems. In terminal you can check include-directories as below command:
gcc -xc++ -E -v -
Use this plugins, when you press "#include
2.1 google-cpplint
Some tools are required in your system
sudo apt-get install python-pip python-dev build-essential
sudo pip install cpplint
Then your can configure your emacs.
(defun my:flymake-google-init()
(require 'flymake-google-cpplint)
(custom-set-variables
'(flymake-google-cpplint-command "/usr/local/bin/cpplint"))
(flymake-google-cpplint-load))
(add-hook 'c-mode-hook 'my:flymake-google-init)
(add-hook 'c++-mode-hook 'my:flymake-google-init)
(require 'google-c-style)
(add-hook 'c-mode-common-hook 'google-set-c-style)
(add-hook 'c-mode-common-hook 'google-make-newline-indent)
This is my configure and maybe your cpplint-command directory isn't "/usr/local/bin/cpplint". you can set the directory as below command.
whereis cpplint
Using cpplint, you will see some "!, ?"at the begging of line in your .cpp or .h file, because your code isn't fit with google style.
2.2 clang
sudo apt-get install clang3.5 libclang-dev
git clone https://github.com/Sarcasm/irony-mode.git
git clone https://github.com/MJPA/SimpleJSON.git
mv irony-mode* irony-mode
mv SimpleJSon* SimpleJSon
mv SimpleJSon irony-mode/lib
mv SimpleJSon ~/.emacs.d/
cd ~/.emacs.d/SimpleJSon/build
cmake ..
make
sudo make install
The clang version varies with diffrent systems. you can check the package version in your system as the below command:
sudo apptitude search clang
Then you can configure your emacs as below:
(setenv "LD_LIBRARY_PATH" "/usr/lib/llvm-3.5/lib/")
(add-to-list 'load-path (expand-file-name "~/.emacs.d/irony-mode/elisp/"))
(require 'irony)
(irony-enable 'ac)
(defun my:irony-enable()
(when (member major-mode irony-known-modes)
(irony-mode 1)))
(add-hook 'c++-mode-hook 'my:irony-enable)
(add-hook 'c-mode-hook 'my:irony-enable)
Maybe the llvm-lib directory isn't "usr/lib/llvm-3.5/lib". you can search llvm-lib directory as below:
find / -name "llvm"
In reality, We setenv llv-lib because of iron's run is dependent on llvm-lib and it equals with adding llvm-lib in "/etc/ld.so.conf"file.
3 project manager
3.1 projectile
(require 'projectile)
;;
(projectile-global-mode)
;;
(setq projectile-enable-caching t)
;; f5
(global-set-key [f5] 'projectile-find-file)
In your project-root-directory, you can create a empty file named with ".projectile". When you open any file in your project and press f5, you can rapidly open any other file in your project you want to open. you will benefit from the multi-hierarchy-folder projects.