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Document the issue with libffi versioning. #52

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notmgsk opened this issue Nov 27, 2023 · 1 comment

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notmgsk commented Nov 27, 2023

TBD

jselig-rigetti commented Dec 15, 2023

For context, after the following installation step, trying to use libquil sometimes fails with an error like missing libffi.so.7.

apt install -y libblas-dev libffi-dev libffi8 liblapack-dev libz-dev

So far, workarounds similar to the following seem to work

# libquil expects libffi7 to be installed, even though it is forward-compatible with libffi8.
# Linking libffi.so.7 to libffi.so.8 is acceptable from a compatibility perspective.
ln -s /usr/lib/x86_64-linux-gnu/libffi.so.8 /usr/lib/x86_64-linux-gnu/libffi.so.7

# pick up the "new" lib
ldconfig

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