Build blender as python module (bpy) for Ubuntu

build_bpy_ubuntu.sh

# install building tools and dependencies
sudo apt-get update
sudo apt-get --assume-yes install xpra build-essential git subversion cmake libx11-dev libxxf86vm-dev libxcursor-dev libxi-dev libxrandr-dev libxinerama-dev libglew-dev
# create working directory
mkdir ~/blender-git
# get the source code
cd ~/blender-git
git clone https://git.blender.org/blender.git --single-branch --depth 1
# install libraries
mkdir ~/blender-git/lib
cd ~/blender-git/lib
# it is important to keep the name `linux_centos7_x86_64` even for other distro of linux, ex: ubuntu
# see: https://devtalk.blender.org/t/build-bpy-succeeded-on-macosx-m1-but-failed-on-ubuntu-20-04/22518?u=iyunbo
svn checkout https://svn.blender.org/svnroot/bf-blender/trunk/lib/linux_centos7_x86_64
# now build bpy
cd ~/blender-git/blender
make update
make bpy
# go to build directory
cd ~/blender-git/build_linux_bpy
# now install the bpy python module
make install
# test bpy
DISPLAY=:10
xpra start ${DISPLAY}
~/blender-git/lib/linux_centos7_x86_64/python/bin/python3.9 -c "import bpy; bpy.ops.render.render(write_still=True)"
# built objects are inside `./build_linux_bpy` 

cmakeLists.txt.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c5b5eb317e..febf3971c52 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -252,6 +252,7 @@ mark_as_advanced(WITH_HEADLESS)
 option(WITH_QUADRIFLOW    "Build with quadriflow remesher support" ON)

 option(WITH_AUDASPACE    "Build with blenders audio library (only disable if you know what you're doing!)" ON)
+set(WITH_AUDASPACE ON)
 option(WITH_SYSTEM_AUDASPACE "Build with external audaspace library installed on the system (only enable if you know what you're doing!)" OFF)
 mark_as_advanced(WITH_AUDASPACE)
 mark_as_advanced(WITH_SYSTEM_AUDASPACE)
@@ -303,6 +304,7 @@ option(WITH_IMAGE_HDR           "Enable HDR Image Support" ON)
 # Audio/Video format support
 option(WITH_CODEC_AVI           "Enable Blenders own AVI file support (raw/jpeg)" ON)
 option(WITH_CODEC_FFMPEG        "Enable FFMPeg Support (http://ffmpeg.org)" ON)
+set(WITH_CODEC_FFMPEG ON)
 option(WITH_CODEC_SNDFILE       "Enable libsndfile Support (http://www.mega-nerd.com/libsndfile)" ON)

 # Alembic support

update_gcc.sh

sudo apt install software-properties-common
sudo add-apt-repository ppa:ubuntu-toolchain-r/test

sudo apt install gcc-9 g++-9

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 90 --slave /usr/bin/g++ g++ /usr/bin/g++-9 --slave /usr/bin/gcov gcov /usr/bin/gcov-9

with AUDASPACE support
with FFMPEG support