Youcompleteme: Failed on 100%: Linking CXX shared library

[rivalak]

Issue Prelude

Issue Details

I was compiling YCM in my deepin system with SpaceVim.
And in the last step:
"Linking CXX shared library /home/rivalak/.cache/vimfiles/repos/github.com/Valloric/YouCompleteMe/third_party/ycmd/ycm_core.so"
However, it failed, and the error information shows as follow.
CMake Error: The source directory "/home/rivalak/.cache/vimfiles/repos/github.com/Valloric/YouCompleteMe/third_party/ycmd/third_party/cregex" does not appear to contain CMakeLists.txt.

questions:

I try to install some dependencies, but it is useless.

Include steps to reproduce here.

• cd /home/rivalak/.cache/vimfiles/repos/github.com/Valloric/YouCompleteMe
• git submodule update --init --recursive
• python3 install.py --clang-completer

screenshots, etc.

Output of nvim --version

NVIM v0.3.2-dev
Build type: RelWithDebInfo
LuaJIT 2.0.5

Output of build/install commands

Include link to a [gist][] containing the invocation and entire output of
install.py if reporting an installation issue.

[12:48:36] rivalak:YouCompleteMe git:(master) $ python3 install.py --clang-completer
Searching Python 3.6 libraries...
Found Python library: /usr/lib/python3.6/config-3.6m-x86_64-linux-gnu/libpython3.6.so
Found Python headers folder: /usr/include/python3.6m
-- The C compiler identification is GNU 7.3.0
-- The CXX compiler identification is GNU 7.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found PythonLibs: /usr/lib/python3.6/config-3.6m-x86_64-linux-gnu/libpython3.6.so (found suitable version "3.6.5", minimum required is "3.4")
-- Using libclang archive: /home/rivalak/.cache/vimfiles/repos/github.com/Valloric/YouCompleteMe/third_party/ycmd/cpp/../clang_archives/libclang-7.0.0-x86_64-unknown-linux-gnu.tar.bz2
-- Using libclang to provide semantic completion for C/C++/ObjC
-- Using external libclang: /tmp/ycm_build_fok1sn62/lib/libclang.so.7
-- NOT using clang-tidy for static analysis.
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/ycm_build_fok1sn62
Scanning dependencies of target BoostParts
[ 1%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/codecvt_error_category.cpp.o
[ 3%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/operations.cpp.o
[ 7%] Building CXX object BoostParts/CMakeFiles/BoostParts.dir/libs/filesystem/src/path_traits.cpp.o
...........
[ 98%] Building CXX object ycm/CMakeFiles/ycm_core.dir/ycm_core.cpp.o
[100%] Linking CXX shared library /home/rivalak/.cache/vimfiles/repos/github.com/Valloric/YouCompleteMe/third_party/ycmd/ycm_core.so
[100%] Built target ycm_core
CMake Error: The source directory "/home/rivalak/.cache/vimfiles/repos/github.com/Valloric/YouCompleteMe/third_party/ycmd/third_party/cregex" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
ERROR: the build failed.

__NOTE :__ it is highly unlikely that this is a bug but rather
that this is a problem with the configuration of your system
or a missing dependency. Please carefully read CONTRIBUTING.md
and if you're sure that it is a bug, please raise an issue on the
issue tracker, including the entire output of this script
and the invocation line used to run it.

[bstaletic]

[100%] Built target ycm_core

Your ycm_core.so built and linked correctly. Your YCM can already be used.

The source directory "/home/rivalak/.cache/vimfiles/repos/github.com/Valloric/YouCompleteMe/third_party/ycmd/third_party/cregex" does not appear to contain CMakeLists.txt.

However, the third_party/cregex directory seems to be empty. This should be fixed with git submodule update --init --recursive.

Closing, as this isn't a YCM bug.

[luckscx]

i have very same problem.
after
git submodule update --init --recursive
still empty on dir "YouCompleteMe/third_party/ycmd/third_party/cregex"
i manual git clone this repo to folder to fix this.

[kinochi]

The same problem bugs me on Cygwin64

[rivalak]

The same problem bugs me on Cygwin64

Don't worry, you can solve this issue according to the following two suggestions.

#Delete "cregex" folder
rm -fr YouCompleteMe/third_party/ycmd/third_party/cregex
#Execute below command in "YouCompleteMe/third_party/ycmd/third_party" directory
git submodule update --init --recursive 

[royyanbach]

The same problem bugs me on Cygwin64

you can solve this by rm dir "YouCompleteMe/third_party/ycmd/third_party/cregex" and execute git submodule update --init --recursive on the dir of "YouCompleteMe/third_party/ycmd/third_party"

This solves my problem. Thanks 👍

[storluffarn]

Same issue on fresh xubuntu 18.10 installation, this last piece also solved the issue for me.

[lightflash7]

The same problem bugs me on Cygwin64

Don't worry, you can solve this problem based on the next TWO suggestions.

* rm dir "YouCompleteMe/third_party/ycmd/third_party/cregex"

* execute git submodule update --init --recursive on the dir of "YouCompleteMe/third_party/ycmd/third_party"

Thanks a lot.

[arreisGit]

The same problem bugs me on Cygwin64

Don't worry, you can solve this problem based on the next TWO suggestions.

• rm dir "YouCompleteMe/third_party/ycmd/third_party/cregex"
• execute git submodule update --init --recursive at the dir of "YouCompleteMe/third_party/ycmd/third_party"

This solved the issue for me, thanks!