[Bf-python] Blender as a Python Module - Ubuntu

[Jeffrey]

I come across the same build errors when I try to build the bpy module
against the default install_deps.sh version of python. I solved this by
building python as a dynamic library instead of the default static
library. You can use the same configuration options as in
install_deps.sh with the addition of `--enable-shared`:

./configure --prefix=/opt/lib/python-3.6-bpy \
--libdir=/opt/lib/python-3.6.2-bpy/lib \
--enable-ipv6 --enable-loadable-sqlite-extensions \
--with-dbmliborder=bdb --with-computed-gotos --with-pymalloc \
--enable-shared

I keep the two python builds separate so I can use both bpy and regular
source builds at the same time and just point my build script to the
proper directory when I build blender. The cmake variable you would
change to set a different python directory is:

PYTHON_ROOT_DIR=/opt/lib/python-3.6.2-bpy


On 12/31/2017 03:27 PM, Daniel Savo wrote:
> *Note*
> Apologies if this is not the right mailing list for this. I went through
> the archives and found some similar questions, but nothing that could
> help me with this issue. Willing to get simple feedback or to pay
> someone to just do it for me.
> 
> *Problem*
> I've been trying to compile Blender as a python module (following these
> instructions:
> https://wiki.blender.org/index.php/Dev:Doc/Building_Blender/Linux/Ubuntu/CMake)
> to no avail. I'm able to make an out-of-source build, but once I do the
> changes in the "Building" section of those instructions (and running
> "make" in the /build directory), the build fails, and I'm unable to find
> a solution. I'm running a 64-bit machine with Linux (Ubuntu 16.04.3). 
> and this is the relevant info that is outputted:
> 
> /[ 98%] Building C object
> source/creator/CMakeFiles/blender.dir/buildinfo.c.o/
> /[ 98%] Linking CXX shared module ../../bin/bpy.so/
> //usr/bin/ld.gold: error:
> /opt/lib/python-3.6/lib/libpython3.6m.a(abstract.o): requires dynamic
> R_X86_64_PC32 reloc against 'PyType_IsSubtype' which may overflow at
> runtime; recompile with -fPIC/
> //usr/bin/ld.gold: error:
> /opt/lib/python-3.6/lib/libpython3.6m.a(boolobject.o): requires dynamic
> R_X86_64_32 reloc which may overflow at runtime; recompile with -fPIC/
> //usr/bin/ld.gold: error:
> /opt/lib/python-3.6/lib/libpython3.6m.a(bytearrayobject.o): requires
> dynamic R_X86_64_32 reloc against '_PyByteArray_empty_string' which may
> overflow at runtime; recompile with -fPIC/
> /./
> /./
> /. (same error for other .o files)/
> /./
> /./
> //usr/bin/ld.gold: error:
> /opt/lib/python-3.6/lib/libpython3.6m.a(getcompiler.o): requires dynamic
> R_X86_64_32 reloc which may overflow at runtime; recompile with -fPIC/
> /collect2: error: ld returned 1 exit status/
> /source/creator/CMakeFiles/blender.dir/build.make:363: recipe for target
> 'bin/bpy.so' failed/
> /make[2]: *** [bin/bpy.so] Error 1/
> /CMakeFiles/Makefile2:7766: recipe for target
> 'source/creator/CMakeFiles/blender.dir/all' failed/
> /make[1]: *** [source/creator/CMakeFiles/blender.dir/all] Error 2/
> /Makefile:160: recipe for target 'all' failed/
> /make: *** [all] Error 2/
> 
> *Attempted Solutions*
> I tried adding -fPIC to the /blender/CMakeLists.txt file as discussed
> here
> https://stackoverflow.com/questions/36779834/compiling-blender-bpy-recompile-with-fpic
> I tried adding the CMAKE_POSITION_INDEPENDENT_CODE to ON in
> /blender/CMakeLists.txt as discussed here
> https://stackoverflow.com/questions/38296756/what-is-the-idiomatic-way-in-cmake-to-add-the-fpic-compiler-option
> I tried changing everything to static linking as discussed in the
> "Manual CMake Setup / Static Linking" section here
> https://wiki.blender.org/index.php/Dev:Doc/Building_Blender/Linux/Ubuntu/CMake
> This caused different issues with the boost library I tried to address,
> but ended up giving up on this possible path, thinking there isn't a
> specific need to static link all dependencies, and avoid
> overcomplicating the situation for myself.
> *
> *
> *Final Note*
> Given how I failed at all my attempts so far and I've been able to waste
> 4 days on this, I'd be happy for any insight I can get, or pay someone
> of the Blender community to do this so I can get over this issue and
> continue with the work I need to do. Just let me know.
> 
> Regards,
> Daniel
> 
> 
> 
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> 

-- 
Jeffrey "Italic_" Hoover