kou commented on issue #39695:
URL: https://github.com/apache/arrow/issues/39695#issuecomment-1912186637
`llvm_orc_registerEHFrameSectionWrapper` is needed to be visible in the
target process.
For PyArrow case, `llvm_orc_registerEHFrameSectionWrapper` is needed to be
visible in `python` process.
Here are solutions for this case but all of them are subtlety...:
1. Use `os.RTLD_GLOBAL` to import `pyarrow.gandiva`
```python
import sys
import os
sys.setdlopenflags(sys.getdlopenflags() + os.RTLD_GLOBAL)
import pyarrow.gandiva
```
Python use `os.RTLD_LOCAL` by default. So symbols in `libLLVM-17.so` aren't
visible in `python` process.
2. Load `libLLVM-17.so` to `python` process
Use `LD_PRELOAD`:
```console
$ LD_PRELOAD=/lib/llvm-17/lib/libLLVM-17.so python ...
```
Use `ctype` and `os.RTLD_GLOBAL`:
```python
import pyarrow.gandiva as gandiva
import ctypes
import os
import sys
ctypes.CDLL("libLLVM-17.so.1", sys.getdlopenflags() + os.RTLD_GLOBAL)
```
Note: We can't use the `ENABLE_EXPORTS` approach that is used by
https://github.com/llvm/llvm-project/commit/2ad8e6e082e254e5560c1c04b20a9904429d8bf0
because we don't build Python and Python isn't linked to `libLLVM.so`.
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