What does "ignoring (possibly broken) abi-depends field for packages" mean?

Question

I've got this warning

ignoring (possibly broken) abi-depends field for packages

when run cabal build with my small project. What does it mean? And when I use usual ghc -O2 mylib.lhs I've got no such warning, why?

Haskell Platform with ghc 8.4.3 on Windows 7 64-bit

Answer 1

According to this issue https://github.com/haskell/cabal/issues/5465 message appears "whenever a package registration (IPI) includes a abi-depends: field", thought to be redundant and removed in future releases.