profiling

Hi, The following command can install acme-http with profiling if GHC 7.6.3 is used: % cabal install -p --ghc-options="-prof -fprof-auto" --enable-executable-profiling -j10 acme-http But if GHC head is used, the following error occurs: % cabal install -p --ghc-options="-prof -fprof-auto" --enable-executable-profiling -j10 acme-http In function `sofa_closure': (.data+0xe8): undefined reference to `CCCS' /ghc-head/lib/ghc-7.7.20130616/Cabal-1.17.0/libHSCabal-1.17.0_p.a(Setup__1680.p_o):(.data+0x88): more undefined references to `CCCS' follow Is this a bug? I'm using Linux 3 and Cabal version is: % cabal --version cabal-install version 1.16.0.2 using version 1.16.0 of the Cabal library --Kazu