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Herbert Valerio Riedel authored
This makes `VERSION` updating a bit more robust (the file gets only updated if its content would actually change), as well as moving the dependency of `VERSION` and `GIT_COMMIT_ID` to the `sdist-ghc-prep` target, as that's where it's actually needed. This fixes the specialised target `make sdist-ghc` not properly creating/updating the `VERSION` and `GIT_COMMIT_ID` files before creating the ghc source-dist tarball, as well as avoiding stale `VERSION` files.
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