Building YCM on Ubuntu 14.04: Could NOT find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DI

[Thomas Upton]

```

❯ ./install.sh

/tmp/ycm_build.mMJcpr ~/.vim/bundle/YouCompleteMe

-- The C compiler identification is GNU 4.8.2

-- The CXX compiler identification is Clang 3.4.0

-- 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

-- 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

Your C++ compiler supports C++11, compiling in that mode.

CMake Error at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108 (message):

  Could NOT find PythonLibs (missing: PYTHON_LIBRARIES PYTHON_INCLUDE_DIRS)

  (Required is at least version "2.6")

Call Stack (most recent call first):

  /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:315 (_FPHSA_FAILURE_MESSAGE)

  /usr/share/cmake-2.8/Modules/FindPythonLibs.cmake:208 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)

  BoostParts/CMakeLists.txt:30 (find_package)

-- Configuring incomplete, errors occurred!

See also "/tmp/ycm_build.mMJcpr/CMakeFiles/CMakeOutput.log".

```

Googling about the above errors gives me reason to think that CMake can't find architecture-specific Python libs, but I could be completely mistaken.

Has anyone seen this issue before? I tried searching issues both in the YCM github and here in this user group, but I couldn't find anything relevant.

[Neil Han]

I had similar issue with ubuntu 14.04. The host is missing python-dev or python3-dev package.

You can try this: 

sudo apt-get install python-dev python3-dev

[Konrad Tallman]

THANKS! This worked for me!

[Kevin Blansit]

I understand that either using atp-get or yum install the python-dev typically works to fix this, but I was wondering how to do so without root access. I'm currently on a cluster linux server without any access to root or sudo abilities. 

[Kevin Blansit]

I found out that I had to manually specify my python libraries in a similar way to as follows: 

-DPYTHON_INCLUDE_DIR=/work/miniconda/include/python2.7/ \

-DPATH_TO_LLVM_ROOT=~/ycm_build/llvm_root_dir \

[Edward Li]

I found the same issue...

[Erich Foster]

I too had this issue and the way I discovered I could solve it was by setting PYTHON_LIBRARY and PYTHON_INCLUDE then doing the following

export EXTRA_CMAKE_ARGS='-DPYTHON_INCLUDE_DIR=<LOCATION_OF_PYTHON_INCLUDE> -DPYTHON_LIBRARY=<LOCATION_OF_PYTHON_LIB>'
./install.py --clang-completer