DSO linking bug (unix package / pthread)
Simon Hengel
sol at typeful.net
Mon May 20 13:25:21 CEST 2013
Hi,
when I try to use System.Posix.Semaphore.semUnlink on Ubuntu 13.04 I get
the following liker error:
/usr/bin/ld: /home/sol/.install/haskell/ghc-7.0.4/lib/ghc-7.0.4/unix-2.4.2.0/libHSunix-2.4.2.0.a(Semaphore__3.o): undefined reference to symbol 'sem_unlink@@GLIBC_2.2.5'
/usr/bin/ld: note: 'sem_unlink@@GLIBC_2.2.5' is defined in DSO /lib/x86_64-linux-gnu/libpthread.so.0 so try adding it to the linker command line
/lib/x86_64-linux-gnu/libpthread.so.0: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
The issue can be reproduced by compiling
-- Main.hs
import System.Posix.Semaphore
main :: IO ()
main = do
semUnlink "pwsafe"
with `ghc --make Main.hs`.
Probably related to those changes to DSO liking:
https://fedoraproject.org/wiki/UnderstandingDSOLinkChange
Any chances that we fix this for previous releases, too (I'm interested
in ghc-6.12.1 to ghc-7.6.3)?
Cheers,
Simon
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