CODEWITHSUNDEEP
pythoncompiler-errorscompilationblender
fbence
fbence

Reputation: 2153

Unable to build blender

I am trying to build blender so that I can use it directly from python and was going through this tutorial and I got stuck on the very first make command giving me 

CMake Error at /usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108 (message):
  Could NOT find PythonLibsUnix (missing: PYTHON_LIBRARY PYTHON_LIBPATH
  PYTHON_INCLUDE_DIR PYTHON_INCLUDE_CONFIG_DIR)

I am using Ubuntu 14.04, with the system python installs (3.4.3 and 2.7.6). I am expected to specify manually these environment variables (if they are that)? Or it's something else? If the former, what are the standard paths for these?

Upvotes: 6

Views: 5267

Answers (6)

JJones
JJones

Reputation: 812

UPDATE: Python3.10 ( and future versions I assume ) are included in the precompiled libs but the update fails to get new files often (an svn issue). If you aren't making any changes in ../lib then you are safe to use revert instead:

cd ../lib/linux_centos7_x86_64
svn revert --recursive .

don't miss the trailing period.

You shouldn't need to do anything else.

I'm leaving my original solution below:

My distro ( Devuan ) doesn't yet offer python3.10. I compiled and installed it in a custom directory so as not to affect existing python installations.

Find the python version you need and download it from https://www.python.org/downloads/

Expand it in a working directory ( ok to delete later ):

tar -xf Python-3.10.8.tgz
cd Python-3.10.8

now configure python to build with custom paths ( here I'm using ~/blenderpython )

export set BLENDERPYTHONDIR=/home/`whoami`/blenderpython

./configure --enable-optimizations --prefix=$BLENDERPYTHONDIR
make -j 4 
make install

Add required packages:

cd $BLENDERPYTHONDIR/bin/;  
./pip3 install numpy;
./pip3 install requests;
./pip3 install zstandard;
./pip3 install cython;
./pip3 -vvv list   # to see installed and where.
# i.e. all installed in ~/blenderpython/lib/python3.10/site-packages

Now go to your blender source.. in home dir?

cd ~/blender-git/blender/

and try building again specifying your new python

BUILD_CMAKE_ARGS=-DPYTHON_EXECUTABLE=$BLENDERPYTHONDIR/bin/python3.10\ -DPYTHON_LIBRARY=$BLENDERPYTHONDIR/lib/libpython3.10.a\ -DPYTHON_INCLUDE_DIR=$BLENDERPYTHONDIR/include/python3.10/ make full

note there are two backslashed spaces in the command above.

note PYTHON_EXECUTABLE and PYTHON_LIBRARY point to files. PYTHON_INCLUDE_DIR points to... a dir.

Upvotes: 0

ThorSummoner
ThorSummoner

Reputation: 18109

this website claims that the following syntax will "re-define [all PYTHON_* variables] based on your Python prefix"

cmake ./ ../blender -U PYTHON* -D PYTHON_ROOT_DIR=/opt/my_python

and i think this should be the equivalent of passing these settings into blender 3.0's makefile

BUILD_CMAKE_ARGS=-U\ PYTHON\*\ -D\ PYTHON_ROOT_DIR=$PWD/my-path-to/Python-3.9.9/ make

...

but i still get

CMake Error at /usr/share/cmake-3.16/Modules/FindPackageHandleStandardArgs.cmake:146 (message):
  Could NOT find PythonLibsUnix (missing: PYTHON_LIBRARY PYTHON_INCLUDE_DIR
  PYTHON_INCLUDE_CONFIG_DIR)

so idk, maybe this is an obsolete doc

Upvotes: 1

Miro Iliaš
Miro Iliaš

Reputation: 428

For compilation, you have to point to Python3:

cmake -DPYTHON_LIBRARY=/usr/bin/python3.4m -DPYTHON_INCLUDE_DIR=/usr/include/python3.4m ..

Upvotes: 6

Scott Stensland
Scott Stensland

Reputation: 28285

This will solve your issue 

sudo apt-get build-dep  blender

similar compile time dependency problems for other applications can be solved by doing this build-dep trick

By cherry picking from the list of packages above cmd wants to install, you probably need just these :

sudo apt-get install libpython3-dev libpython3.4-dev

although allowing the build-dep cmd to run will jack up otherwise disabled features you may want in blender

enjoy

Upvotes: 3

sambler
sambler

Reputation: 7079

If it isn't finding the python files then you will need to tell it where they are.

If you have checked out the current master then it would be looking for python 3.5 as this has recently been setup to be the default for the next release, you can still set it to 3.4 for now as I don't think any 3.5 specific code changes have happened yet. If you downloaded a release tarball then it should be looking for 3.4 (unless you have an older source copy)

Upvotes: 1

Sam F
Sam F

Reputation: 571

Maybe you are missing the python development libraries

apt-get install python-dev

??

Upvotes: 0

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