#5864: Windows build fails: undefined reference to `_imp___imp__n_capabilities'
---------------------------------+------------------------------------------
Reporter: igloo | Owner:
Type: bug | Status: new
Priority: highest | Milestone: 7.6.1
Component: Compiler | Version: 7.5
Keywords: | Os: Windows
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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The Windows build is currently failing with:
{{{
"inplace/bin/ghc-stage2.exe" -fPIC -dynamic -H32m -O -Wall -Werror -H64m
-O0 -package-name dph-prim-par-0.6.0.1 -hide-all-packages -i
-ilibraries/dph/dph-prim-par/. -ilibraries/dph/dph-prim-par/dist-
install/build -ilibraries/dph/dph-prim-par/dist-install/build/autogen
-Ilibraries/dph/dph-prim-par/dist-install/build -Ilibraries/dph/dph-prim-
par/dist-install/build/autogen -Ilibraries/dph/dph-prim-par/. -optP-
include -optPlibraries/dph/dph-prim-par/dist-
install/build/autogen/cabal_macros.h -package base-4.4.0.0 -package dph-
base-0.6.0.1 -package dph-prim-interface-0.6.0.1 -package dph-prim-
seq-0.6.0.1 -package old-time-1.0.0.7 -package random-1.0.1.1 -package
vector-0.9.1 -Odph -funbox-strict-fields -fcpr-off -Wall -XHaskell98
-XTypeFamilies -XGADTs -XRankNTypes -XBangPatterns -XMagicHash
-XUnboxedTuples -XTypeOperators -XFlexibleInstances -XFlexibleContexts -O2
-O -dcore-lint -fno-warn-deprecated-flags -no-user-package-conf -rtsopts
-Wwarn -odir libraries/dph/dph-prim-par/dist-install/build -hidir
libraries/dph/dph-prim-par/dist-install/build -stubdir libraries/dph/dph-
prim-par/dist-install/build -hisuf dyn_hi -osuf dyn_o -hcsuf dyn_hc -c
libraries/dph/dph-prim-
par/./Data/Array/Parallel/Unlifted/Distributed/TheGang.hs -o libraries/dph
/dph-prim-par/dist-
install/build/Data/Array/Parallel/Unlifted/Distributed/TheGang.dyn_o
"inplace/bin/ghc-stage2.exe" -fPIC -dynamic -H32m -O -Wall -Werror -H64m
-O0 -package-name dph-prim-par-0.6.0.1 -hide-all-packages -i
-ilibraries/dph/dph-prim-par/. -ilibraries/dph/dph-prim-par/dist-
install/build -ilibraries/dph/dph-prim-par/dist-install/build/autogen
-Ilibraries/dph/dph-prim-par/dist-install/build -Ilibraries/dph/dph-prim-
par/dist-install/build/autogen -Ilibraries/dph/dph-prim-par/. -optP-
include -optPlibraries/dph/dph-prim-par/dist-
install/build/autogen/cabal_macros.h -package base-4.4.0.0 -package dph-
base-0.6.0.1 -package dph-prim-interface-0.6.0.1 -package dph-prim-
seq-0.6.0.1 -package old-time-1.0.0.7 -package random-1.0.1.1 -package
vector-0.9.1 -Odph -funbox-strict-fields -fcpr-off -Wall -XHaskell98
-XTypeFamilies -XGADTs -XRankNTypes -XBangPatterns -XMagicHash
-XUnboxedTuples -XTypeOperators -XFlexibleInstances -XFlexibleContexts -O2
-O -dcore-lint -fno-warn-deprecated-flags -no-user-package-conf -rtsopts
-Wwarn -odir libraries/dph/dph-prim-par/dist-install/build -hidir
libraries/dph/dph-prim-par/dist-install/build -stubdir libraries/dph/dph-
prim-par/dist-install/build -hisuf dyn_hi -osuf dyn_o -hcsuf dyn_hc
libraries/dph/dph-prim-par/dist-
install/build/Data/Array/Parallel/Unlifted/Distributed/TheGang.dyn_o
-shared -dynamic -dynload deploy -no-auto-link-packages -o libraries/dph
/dph-prim-par/dist-install/build/libHSdph-prim-
par-0.6.0.1-ghc7.5.20120208.dll
libraries\dph\dph-prim-par\dist-
install\build\Data\Array\Parallel\Unlifted\Distributed\TheGang.dyn_o:fake:(.text+0x72):
undefined reference to `_imp___imp__n_capabilities'
Creating library file: libraries/dph/dph-prim-par/dist-install/build
/libHSdph-prim-par-0.6.0.1-ghc7.5.20120208.dll.a
collect2: ld returned 1 exit status
make[1]: *** [libraries/dph/dph-prim-par/dist-install/build/libHSdph-prim-
par-0.6.0.1-ghc7.5.20120208.dll] Error 1
make: *** [all] Error 2
}}}
The essence of the problem is:
{{{
module Foo where
import Control.Concurrent (getNumCapabilities)
import System.IO.Unsafe (unsafePerformIO)
numCapabilities :: Int
numCapabilities = unsafePerformIO getNumCapabilities
}}}
{{{
$ ../inplace/bin/ghc-stage2.exe -fPIC -dynamic -package-name foo-1.0
-hide-all-packages -package base -hisuf dyn_hi -osuf dyn_o -c Foo.hs -O
-dcore-lint -o Foo.dyn_o
$ ../inplace/bin/ghc-stage2.exe -fPIC -dynamic -package-name foo-1.0
-hide-all-packages -package base -hisuf dyn_hi -osuf dyn_o Foo.dyn_o
-shared -dynamic -dynload deploy -no-auto-link-packages -o
libHSfoo-1.0-ghc7.5.20120208.dll
Foo.dyn_o:fake:(.text+0x72): undefined reference to
`_imp___imp__n_capabilities'
Creating library file: libHSfoo-1.0-ghc7.5.20120208.dll.a
collect2: ld returned 1 exit status
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5864>
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