Recompiling/relinking dependent applications/libraries on DSO change

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binutils 2.29 introduced an optimization which requires that in the
general case, applications and libraries linking against a DSO will have
to be rebuilt when the DSO change the implementation of functions (i.e.,
changes to a function body can change ABI).  This is how many native
programming languages (such as Ada, Haskell/GHC, Go, Rust) handle DSOs,
but it's a material change for C and C++.

The question is: Do we want to move into that direction, or do we need
to ask binutils upstream to back out this change?

Thanks,
Florian
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