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I am trying to build inria Graphite on my ubuntu which is running in a VirtualBox simulator, I follow the instructions, and install the python-dev packages, but when I run cmake , still got an error:

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 "3.2") 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) src/packages/OGF/gel_python3/CMakeLists.txt:11 (FIND_PACKAGE)

I checked the /usr/lib/ and find 

tintin@tintin-VirtualBox:/usr/lib$ find . -name "libpython*" ./x86_64-linux-gnu/libpython3.4m.so.1.0 ./x86_64-linux-gnu/libpython2.7.so.1.0 ./x86_64-linux-gnu/libpython3.4m.a ./x86_64-linux-gnu/libpython2.7.a ./x86_64-linux-gnu/libpython3.4m.so ./x86_64-linux-gnu/libpython2.7.so ./x86_64-linux-gnu/libpython2.7.so.1 ./x86_64-linux-gnu/libpython3.4m.so.1

so why cmake can not find the PythonLibs, or how should I deal with this?

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4 Answers 4

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Installing python-dev actually fixed this for me:

sudo apt-get install python-dev

Got the hint here: https://github.com/Valloric/YouCompleteMe/issues/484

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  • 2
    Rather than pointing to an external link please copy-paste the relevant portion from there so that if the link is unreachable for some reason the contents are still available here.. Commented Jun 26, 2015 at 20:52
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    Well, the solution is to run: sudo apt-get install python-dev Commented Jun 26, 2015 at 21:13
  • @helgar Please edit your answer and add the above command. Commented Jun 27, 2015 at 5:39
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    A small note: for Python 3 use apt-get install python3-dev. python-dev and python3-dev are metapackages that pull the most current dev upstream for the selected Python. Commented Sep 18, 2015 at 0:35
  • This does not solve the issue in all cases, the answer given by @Job explains why. Commented Oct 3, 2016 at 9:30
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The problem seems to be that Ubuntu 14.04 installs Python 3.4 by default and the CMake version from Ubuntu (2.8) only searches up to Python 3.3. A workaround is to add set(Python_ADDITIONAL_VERSIONS 3.4) before the find_package statement. Note that I filed a bug about this issue.

Since CMake 3.0, CMake searches up to Python 3.4, so installing that version manually should also fix the problem.

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    It would be nice to give an explanation about the downvote. Commented Aug 26, 2014 at 6:03
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For me the issue was a bad cache

rm CMakeCache.txt

Removed the cache with the old 2.7 version and allowed it to find 3.2 in my case.

The cmake I used is

find_package(PythonInterp 3.2 REQUIRED) find_package(PythonLibs 3.2 REQUIRED) message(STATUS "PYTHON_LIBRARIES = ${PYTHON_LIBRARIES}") message(STATUS "PYTHON_EXECUTABLE = ${PYTHON_EXECUTABLE}") message(STATUS "PYTHON_INCLUDE_DIRS = ${PYTHON_INCLUDE_DIRS}") ... include_directories(${PYTHON_INCLUDE_DIRS})
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I recently had a similar issue with Ubuntu 14.04 64-bit; apparently, CMake does not look into architecture dependent install folders by default:

CMake constructs a set of possible installation prefixes for the package. Under each prefix several directories are searched for a configuration file. The tables below show the directories searched. [...] <prefix>/(lib/<arch>|lib|share)/cmake/<name>*/ (U) <prefix>/(lib/<arch>|lib|share)/<name>*/ (U) <prefix>/(lib/<arch>|lib|share)/<name>*/(cmake|CMake)/ (U) [...] In all cases the <name> is treated as case-insensitive and corresponds to any of the names specified (<package> or names given by NAMES). Paths with lib/<arch> are enabled if CMAKE_LIBRARY_ARCHITECTURE is set.

(from CMake 2.8.12 online documentation of the find_package command)

A solution consists in setting this CMAKE_LIBRARY_ARCHITECTURE in the project root CMakeLists.txt file (in your case that would be editing src/packages/OGF/gel_python3/CMakeLists.txt) before calling find_package for PythonLibs; for instance:

cmake_minimum_required(VERSION 2.8) project(project_name) # Check the architecture and set CMAKE_LIBRARY_ARCHITECTURE accordingly if(UNIX) if(CMAKE_SIZEOF_VOID_P EQUAL 8) set(CMAKE_LIBRARY_ARCHITECTURE "x86_64-linux-gnu") endif() endif() find_package(PythonInterp 3.2 REQUIRED) find_package(PythonLibs 3.2 REQUIRED) # Rest of your file

That worked in my case.

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