unknown symbol `___fixunsdfdi'

[Simon Peyton-Jones]

My msys Windows build is failing, as below. Somehow there's a unknown symbol `___fixunsdfdi' in the base package.

Help!

Simon

"inplace/bin/ghc-stage2.exe"   -H32m -O -Wall -Werror -H64m -O0    -hide-all-packages -i -iutils/haddock/src -iutils/haddock/dist/build -iutils/haddock/dist/build/autogen -Iutils/haddock/dist/build -Iutils/haddock/dist/build/autogen    -optP-DIN_GHC_TREE -optP-include -optPutils/haddock/dist/build/autogen/cabal_macros.h -package Cabal-1.14.0 -package array-0.3.0.3 -package base-4.5.0.0 -package containers-0.5.0.0 -package directory-1.1.0.1 -package filepath-1.2.0.1 -package ghc-7.5.20120420 -package pretty-1.1.1.0 -package xhtml-3000.2.0.5  -funbox-strict-fields -O2 -Wall -fwarn-tabs -XHaskell2010 -XCPP -XDeriveDataTypeable -XScopedTypeVariables -XMagicHash  -no-user-package-conf -rtsopts     -odir utils/haddock/dist/build -hidir utils/haddock/dist/build -stubdir utils/haddock/dist/build -hisuf hi -osuf  o -hcsuf hc -c utils/haddock/src/Haddock/Backends/Xhtml/Layout.hs -o utils/haddock/dist/build/Haddock/Backends/Xhtml/Layout.o
"inplace/bin/ghc-stage2.exe"   -H32m -O -Wall -Werror -H64m -O0    -package-name vector-0.9.1 -hide-all-packages -i -ilibraries/vector/. -ilibraries/vector/dist-install/build -ilibraries/vector/dist-install/build/autogen -Ilibraries/vector/dist-install/build -Ilibraries/vector/dist-install/build/autogen -Ilibraries/vector/include -Ilibraries/vector/internal   -optP-DVECTOR_BOUNDS_CHECKS -optP-include -optPlibraries/vector/dist-install/build/autogen/cabal_macros.h -package base-4.5.0.0 -package ghc-prim-0.2.0.0 -package primitive-0.4.0.1  -O2 -XHaskell98 -XCPP -XDeriveDataTypeable -O2 -O -dcore-lint -fno-warn-deprecated-flags -dcore-lint  -no-user-package-conf -rtsopts -Wwarn    -odir libraries/vector/dist-install/build -hidir libraries/vector/dist-install/build -stubdir libraries/vector/dist-install/build -hisuf hi -osuf  o -hcsuf hc -c libraries/vector/./Data/Vector/Fusion/Stream/Monadic.hs -o libraries/vector/dist-install/build/Data/Vector/Fusion/Stream/Monadic.o
Loading package ghc-prim ... linking ... done.
Loading package integer-gmp ... linking ... done.
Loading package base ... linking ... ghc-stage2.exe: unable to load package `base'
ghc-stage2.exe: c:\code\HEAD\libraries\base\dist-install\build\HSbase-4.5.0.0.o: unknown symbol `___fixunsdfdi'
make[1]: *** [libraries/vector/dist-install/build/Data/Vector/Fusion/Stream/Monadic.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [all] Error 2

bash-3.1$ dirs
/c/code/HEAD
bash-3.1$
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