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GCC 8 now generates warnings for incompatible function pointer casts [-Werror=cast-function-type]. Apparently there are a few of those in rts code, which makes `./validate` unhappy (since we compile with `-Werror`) This commit tries to fix these issues by changing the functions to have the correct type (and, if necessary, moving the casts into those functions). For instance, hash/comparison function are declared (`Hash.h`) to take `StgWord` but we want to use `StgWord64[2]` in `StaticPtrTable.c`. Instead of casting the function pointers, we can cast the `StgWord` parameter to `StgWord*`. I think this should be ok since `StgWord` should be the same size as a pointer. Signed-off-by: Michal Terepeta <michal.terepeta@gmail.com> Test Plan: ./validate Reviewers: bgamari, erikd, simonmar Reviewed By: bgamari Subscribers: rwbarton, thomie, carter Differential Revision: https://phabricator.haskell.org/D4673
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