indygreg/PyOxidizer

Duplicate symbols compiling libpyembed on the starter config

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#278 opened on Aug 14, 2020

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bughelp wanted

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Description

From a new install of PyOxidizer, gcc v7.5 on a ubuntu host:

cargo install pyoxidizer
pyoxidizer init-config-file torch
cd torch
pyoxidizer run

Produces error messages like:

  = note: ld: error: duplicate symbol: ffi_type_double
          >>> defined at types.c
          >>>            types.o:(ffi_type_double) in archive /tmp/pyoxidizer.1OHhrEBicQgz/build/target/x86_64-unknown-linux-gnu/debug/deps/libpyembed-cd26feed010f04a2.rlib
          >>> defined at cfield.c:1652 (./Modules/_ctypes/cfield.c:1652)
          >>>            cfield.o:(.data+0x750) in archive /tmp/pyoxidizer.1OHhrEBicQgz/build/target/x86_64-unknown-linux-gnu/debug/deps/libpyembed-cd26feed010f04a2.rlib

Full output: https://gist.github.com/c7ef834a12fb1205e9413bcca4d97d62

Please let me know if any additional info would be useful for debugging.

Contributor guide

Research direction
Investigate duplicate symbol 'ffi type double' from libffi and Python's ctypes. Trace the compilation and linking commands to see why both are included. Check if a flag like allow multiple definition or z muldefs is needed or if the library should be built differently.
Tech stack
rustpythonc
Domain
build systemtoolingbackend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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Fresh
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Clear
Prerequisites
RustCPython
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50