Hi Blender development forum!
I am trying to build Blender as a Python module. I am also trying to do this on Raspbian.
I know both the environment and the “as a Python module” are unsupported, but I just wanted to document some of the difficulties that I had along the way, and if anyone has any ideas for how to correct the errors, that would be much appreciated!
Limitations
First off, the whole setup process is manual cmake. I basically went through some of the dependencies and installed what I could, but some functionality will not be compilable due to unavailability of some of the dependencies.
NOTE: I’m unable to build with Cycles since
OpenEXR>=2is not provided in Raspbian
What makes matters more difficult is that compiling with make install -j 4 is unfeasible due to the low memory of the Pi (I am using Pi3). So the trial and error method is somewhat limited.
Build Script
mkdir .blenderpy
mkdir .blenderpy/master
mkdir .blenderpy/master/build_bpy_raspbian
cd .blenderpy/master
git clone http://git.blender.org/blender.git
cd blender
git submodule update --init --recursive
git submodule foreach git checkout master
git submodule foreach git pull --rebase origin master
make update
build_files/build_environment/install_deps.sh
cd ../build_bpy_raspbian
cmake ../blender -DWITH_CYCLES=OFF -DWITH_PYTHON_INSTALL=OFF -DWITH_PYTHON_MODULE=ON
make install
Output
[ ...]
[ 29%] Building C object source/blender/makesdna/intern/CMakeFiles/bf_dna.dir/dna_verify.c.o
In file included from /home/tylergubala/.blenderpy/master/build_bpy_debian/source/blender/makesdna/intern/dna_verify.c:2:
/home/tylergubala/.blenderpy/master/blender/source/blender/blenlib/BLI_assert.h:102:37: error: static assertion failed: "DNA struct size verify"
# define BLI_STATIC_ASSERT(a, msg) _Static_assert(a, msg);
^~~~~~~~~~~~~~
/home/tylergubala/.blenderpy/master/build_bpy_debian/source/blender/makesdna/intern/dna_verify.c:6299:1: note: in expansion of macro ‘BLI_STATIC_ASSERT’
BLI_STATIC_ASSERT(sizeof(struct bGPDstroke) == 372, "DNA struct size verify");
^~~~~~~~~~~~~~~~~
/home/tylergubala/.blenderpy/master/blender/source/blender/blenlib/BLI_assert.h:102:37: error: static assertion failed: "DNA struct size verify"
# define BLI_STATIC_ASSERT(a, msg) _Static_assert(a, msg);
^~~~~~~~~~~~~~
/home/tylergubala/.blenderpy/master/build_bpy_debian/source/blender/makesdna/intern/dna_verify.c:8821:1: note: in expansion of macro ‘BLI_STATIC_ASSERT’
BLI_STATIC_ASSERT(sizeof(struct Scene) == 6092, "DNA struct size verify");
^~~~~~~~~~~~~~~~~
make[2]: *** [source/blender/makesdna/intern/CMakeFiles/bf_dna.dir/build.make:125: source/blender/makesdna/intern/CMakeFiles/bf_dna.dir/dna_verify.c.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:5918: source/blender/makesdna/intern/CMakeFiles/bf_dna.dir/all] Error 2
make: *** [Makefile:163: all] Error 2
I am wondering if maybe this is due to the arm 32-bit platform, and the size of various structures is different…?
Also, this seems very similar.