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Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.
The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level. The build system now makes no
pretense at being multi-project, it is just the GHC build system.
No doubt this will break many things, and there will be a period of
instability while we fix the dependencies. A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.
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Change the type of System.Cmd.rawSystem:
rawSystem :: FilePath -> [String] -> IO ExitCode
and implement it properly on both Windows & Unix. The intended
meaning is that the program is executed with *exactly* these
arguments.
We now re-use this rawSystem in the compiler itself (using it directly
from the library if __GLASGOW_HASKELL__ >= 601).
The previous implementation of SysTools.runSomething was broken on
4.08, because Posix.executeFile was broken. However, implementing the
new rawSystem on 4.08 is tricky, because it uses the FFI marshalling
libraries which weren't present on 4.08. Hence, bootstrapping from
4.08 is now not possible (it was already not possible on Windows). It
could be made possible by importing enough FFI marshalling support,
but I won't bother doing that unless/until it is needed.
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