YouCompleteMe(vim plugin) GoToDefinition doesn't work

Question

let g:ycm_global_ycm_extra_conf='~/.vim/bundle/youcompleteme/.ycm_extra_conf.py'
let g:ycm_min_num_of_chars_for_completion=1
let g:ycm_confirm_extra_conf=0
let g:ycm_autoclose_preview_window_after_completion = 1 
nnoremap <F5>           :YcmForceCompileAndDiagnostics<CR>
nnoremap <leader>gic    :YcmCompleter GoToInclude<CR>
nnoremap <leader>gdc    :YcmCompleter GoToDeclaration<CR>
nnoremap <leader>gdf    :YcmCompleter GoToDefinition<CR>
nnoremap <leader>gip    :YcmCompleter GoToImprecise<CR>
nnoremap <leader>f      :YcmCompleter FixIt<CR>

This is the part of ~/.vimrc related to ycm .
Also, flags in .ycm_extra_conf.py contains the result of echo | gcc -std=c++11 -v -E -x c++ - echo | gcc -std=c++11 -v -E -x c++ - which refers to include paths for C-family .

• The problem
  While auto-complete works fine, GoToDefinition doesn't work at all.
  (Here what works means, ycm can recognize local header file in projects.)
  According to the NOTE , GoToDefinition only works in the current translation unit .
  However, GoToDefinition only works in the file being edited in my case.

• What I tried: Give up to make .ycm_extra_conf.py global

  1. Copy .ycm_extra_conf.py into the top of project and modify g:ycm_global_ycm_extra_conf in ~/.vimrc .
  2. Do YcmForceCompileAndDiagnostics
  3. Check final_flags in FlagsForFile function in .ycm_extra_conf.py file .
  4. final_flags was like this.
     ['-Wall', '-Wextra', '-Werror', '-Wc++98-compat', '-Wno-long-long', '-Wno-variadic-macros', '-fexceptions', '-DN DEBUG', '-DUSE_CLANG_COMPLETER', '-std=c++11', '-x', 'c++', '-isystem', '/home/illuxic/Redbase/../BoostParts', ' -isystem', '/System/Library/Frameworks/Python.framework/Headers', '-isystem', '/home/illuxic/Redbase/../llvm/inc lude', '-isystem', '/home/illuxic/Redbase/../llvm/tools/clang/include', '-I', '/home/illuxic/Redbase/.', '-I', ' /home/illuxic/Redbase/./ClangCompleter', '-isystem', '/home/illuxic/Redbase/./tests/gmock/gtest', '-isystem', '/ home/illuxic/Redbase/./tests/gmock/gtest/include', '-isystem', '/home/illuxic/Redbase/./tests/gmock', '-isystem' , '/home/illuxic/Redbase/./tests/gmock/include', '-isystem', '/usr/include/c++/5', '-isystem', '/usr/include/x86 _64-linux-gnu/c++/5', '-isystem', '/usr/include/c++/5/backward', '-isystem', '/usr/lib/gcc/x86_64-linux-gnu/5/in clude', '-isystem', '/usr/local/include', '-isystem', '/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed', '-isystem ', '/usr/include/x86_64-linux-gnu', '-isystem', '/usr/include']
  5. GoToDefinition still gives me ' RuntimeError: Can't jump to definition. '

How can I make GoToDefinition work?
It can't recognize not only indirectly included header files but also directly included header files.

Answer 1

You can see the additional details in here .
What I'd misunderstood is in the comment written by @puremourning.
I recommend you to read this comment first.