Adding -optl-pthread fixes it for me. On Sun, 22 Apr 2012, Johannes Waldmann wrote:

Hi.

I want to produce a statically linked executable. I am trying 'ghc --make -fforce-recomp -static -optl-static Main'

but it gives lots of errors like (.text+0xfa): undefined reference to `pthread_mutex_unlock' collect2: ld returned 1 exit status

A similar thing is mentioned here (see Caveat) http://www.haskell.org/haskellwiki/Web/Literature/Static_linking

The ghc user guide talks a great length about shared libs http://www.haskell.org/ghc/docs/latest/html/users_guide/using-shared-libs.ht... but I don't see anything on how to switch this off.

- J.W.

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On 22 April 2012 22:33, Johannes Waldmann wrote:

Hi.

I want to produce a statically linked executable. I am trying 'ghc  --make -fforce-recomp -static -optl-static  Main'

but it gives lots of  errors like (.text+0xfa): undefined reference to `pthread_mutex_unlock' collect2: ld returned 1 exit status

I believe this is due to C libraries that are used in GHC's RTS; all Haskell libs are statically linked by default.

A similar thing is mentioned here (see Caveat) http://www.haskell.org/haskellwiki/Web/Literature/Static_linking

The ghc user guide talks a great length about shared libs http://www.haskell.org/ghc/docs/latest/html/users_guide/using-shared-libs.ht... but I don't see anything on how to switch this off.

- J.W.

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