default config for cpp ycm

.vim/plugins.vim

@@ -33,3 +33,4 @@ let g:rooter_silent_chdir = 1
 " YouCompleteMe
 let g:ycm_check_if_ycm_core_present = 0
 let g:ycm_confirm_extra_conf = 0
+let g:ycm_global_ycm_extra_conf = $HOME.'/.vim/ycm.py'

.vim/ycm.py

@@ -0,0 +1,18 @@
+def FlagsForFile(filename, **kwargs):
+    flags = [
+        '-Wall',
+        '-Wextra',
+        '-Werror'
+        '-pedantic',
+        '-I',
+        '.',
+        '-isystem',
+        '/usr/include',
+        '-xc++',
+        '-std=c++11'
+    ]
+
+    return {
+        'flags': flags,
+        'do_cache': True
+    }