Building error

[greatwallet]

Environment

• ubuntu 18.04
• python 3.6

Error
Complete building successfully.
When trying to import bop_renderer in /path/to/bop_renderer/lib, the message displays as:

>>> import os
>>> os.listdir('./')
['3rd', 'bop_renderer.cpython-36m-x86_64-linux-gnu.so', 'Makefile', 'CMakeFiles', 'cmake_install.cmake', 'CMakeCache.txt']
>>> import bop_renderer
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: libLLVMX86Disassembler.so.4: cannot open shared object file: No such file or directory

[kimbochen]

Hi, I've encountered the same problem and fixed it by setting environment variables.
Specifically,

export LD_LIBRARY_PATH="{path/to/LLVM/library}:{path/to/osmesa/library}"

Hope this helps!

[greatwallet]

Hi, I've encountered the same problem and fixed it by setting environment variables.
Specifically,

export LD_LIBRARY_PATH="{path/to/LLVM/library}:{path/to/osmesa/library}"

Hope this helps!

Hi! Thanks for the advice, but I don't think it's working.
Actually, I looked into bop_renderer/CMakeLists.txt, and found that it has nothing to do with LLVM library. I tried to add following lines to CMakeLists.txt:

...

# llvm
set(LLVM_LIBRARIES $ENV{LLVM_PREFIX}/lib/libLLVMX86Disassembler.so.4)
include_directories($ENV{LLVM_PREFIX}/include)

...

# try to link LLVM library here
link_directories(${LLVM_PREFIX}/lib)
target_link_libraries(bop_renderer PRIVATE ${OSMESA_LIBRARIES} PRIVATE ${LLVM_LIBRARIES}

After doing compilation job, however, same error occurs as ImportError: libLLVMX86Disassembler.so.4: cannot open shared object file: No such file or directory

Also, I've tried to copy libLLVMX86Disassembler.so.4 directly to bop_renderer/build but still in vain ;(

I am curious that @kimbochen did you build it successfully with python 2.7 or 3.6? Currently bop_renderer only supports python==3.6 right now. I think I may have to trace the old commits of this repo and rebuild it.

[greatwallet]

OK, Problem Solved!
Solution
Copy all library files to your library path of your python environment.
Take myself as an example, I use anaconda as my python environment

cp /path/to/llvm/lib/*.so* /path/to/anaconda3/envs/${your_environment_name}/lib

After doint this, I successfully running bop_renderer/samples/renderer_minimal.py without bugs.

Nevertheless I don't think it's a elegant solution, @thodan @MartinSmeyer would you please take some time to look into this and provide a clean way to solve this?

[wangg12]

I think adding this into ~/.bashrc would also make it work:
export LD_LIBRARY_PATH=/opt/llvm/lib/:$LD_LIBRARY_PATH.

BTW, I can confirm that bop_renderer can at least be built with python 3.7, by changing the version in CMakeLists.txt.

[ZrrrKIT]

Another helpful thing to do is to look where exactly this shared object is stored.
Typing:

locate libLLVMX86Disassembler.so.4

helped me find out that my shared object was in
/home/user/marzdr/bop_renderer/osmesa-install/build/llvm-4.0.1.src/build/lib/libLLVMX86Disassembler.so.4

Then I just added the lib directory to my LD_LIBRARY_PATH and it worked. You can also put it in your ~/.bashrc to automate the process.

export LD_LIBRARY_PATH=/home/user/marzdr/bop_renderer/osmesa-install/build/llvm-4.0.1.src/build/lib/:$LD_LIBRARY_PATH