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haskell.compiler.{ghc98*,ghcHEAD}: bootstrap using source built 9.6

Unfortunately, we are running into trouble linking dependencies of
hadrian against the libraries of the clock package with 9.6.3 and
9.6.4 _bindists_. My current suspiscion is that this is caused by
some kind of discrepancy between the toolchain used by GHC upstream
and us that persists from the configure step used when building the
bindist. The problem seems to be somewhat localized to hsc2hs (hence
clock is an issue), with GHC 9.6.4 bindists even passing a flag to
ld that is not supported by our version of cctools.

The problem is not fully diagnosed, so take the speculation above
with a grain of salt.

As a workaround, we can use the source built GHC 9.6 which is, of
course, configured with our toolchain in the environment.

sternenseemann ccc08ba4 6f19531b

+24
unified split
+3
pkgs/development/compilers/ghc/9.6.3-binary.nix
··· 403 403 # `pkgsMusl`. 404 404 platforms = builtins.attrNames ghcBinDists.${distSetName}; 405 405 maintainers = lib.teams.haskell.members; 406 + # packages involving hsc2hs (clock) produce libraries our 407 + # ld can't link against 408 + broken = stdenv.hostPlatform.isDarwin; 406 409 }; 407 410 }
+21
pkgs/top-level/haskell-packages.nix
··· 298 298 packages.ghc963 299 299 else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then 300 300 packages.ghc963 301 + else if stdenv.hostPlatform.isDarwin then 302 + # it seems like the GHC 9.6.* bindists are built with a different 303 + # toolchain than we are using (which I'm guessing from the fact 304 + # that 9.6.4 bindists pass linker flags our ld doesn't support). 305 + # With both 9.6.3 and 9.6.4 binary it is impossible to link against 306 + # the clock package (probably a hsc2hs problem). 307 + packages.ghc963 301 308 else 302 309 packages.ghc963Binary; 303 310 inherit (buildPackages.python3Packages) sphinx; ··· 316 323 packages.ghc963 317 324 else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then 318 325 packages.ghc963 326 + else if stdenv.hostPlatform.isDarwin then 327 + # it seems like the GHC 9.6.* bindists are built with a different 328 + # toolchain than we are using (which I'm guessing from the fact 329 + # that 9.6.4 bindists pass linker flags our ld doesn't support). 330 + # With both 9.6.3 and 9.6.4 binary it is impossible to link against 331 + # the clock package (probably a hsc2hs problem). 332 + packages.ghc963 319 333 else 320 334 packages.ghc963Binary; 321 335 inherit (buildPackages.python3Packages) sphinx; ··· 334 348 if stdenv.hostPlatform.isAarch32 then 335 349 packages.ghc963 336 350 else if stdenv.hostPlatform.isPower64 && stdenv.hostPlatform.isLittleEndian then 351 + packages.ghc963 352 + else if stdenv.hostPlatform.isDarwin then 353 + # it seems like the GHC 9.6.* bindists are built with a different 354 + # toolchain than we are using (which I'm guessing from the fact 355 + # that 9.6.4 bindists pass linker flags our ld doesn't support). 356 + # With both 9.6.3 and 9.6.4 binary it is impossible to link against 357 + # the clock package (probably a hsc2hs problem). 337 358 packages.ghc963 338 359 else 339 360 packages.ghc963Binary;