Explicit DT_NEEDED

[SomeoneSerge]

It seems that many of the https://developer.download.nvidia.com/compute/cuda/redist/ packages come with empty DT_NEEDED. For example patchelf --print-rpath lib/libnvrtc.so is empty, but libnvrtc.so (depending on usage) tries to dlopen libnvrtc-builtins.so at runtime.

In nixpkgs we use DT_NEEDED to infer dependencies of pre-built binaries and automatically patchelf them with appropriate Runpaths. When libraries dlopen() undeclared dependencies we currently only discover this from users' error reports and have to handle these dependencies manually, e.g.

• cudaPackages: append $ORIGIN to Runpaths NixOS/nixpkgs#226038
• SomeoneSerge/nixpkgs@f55d2a1
• NixOS/nixpkgs@510e2cc#diff-9b6f03714fcb7e3e19ce74b9d3f35e478670b94e5d225ac776f4135c5b11f7b9R94

We're still looking for better way to do things, but meantime I wonder if it would be possible to build cuda packages such that dependencies end up listed in DT_NEEDED in the first place. Thanks!