Thanks Simon. That is the best answer I've received to this question in many askings.
I will try to go the shared library route. A question about you last comment: when you say link RTS and base, you mean extract the object files and package in a single .a? Am I going to run into namespace collisions? Joe > -----Original Message----- > From: Simon Marlow [mailto:[EMAIL PROTECTED] > Sent: Wednesday, March 12, 2008 3:18 PM > To: Bruce, Joseph R (Joe) > Cc: glasgow-haskell-users@haskell.org > Subject: Re: Understanding the undefine flags passed to gcc > when linking > > Bruce, Joseph R (Joe) wrote: > > > > When I run 'ghc -v ...', the linking is done via gcc->ld > with a large > > list of -u flags passed in. I'm hoping to find a way to link my > > object files without those flags, but first I need to > understand what > > they are doing. Can someone explain it to me? Or point me to > > documentation that explains it? > > > > My ultimate goal is to build a static Haskell library and make it > > available to c programmers ignorant of Haskell. The undefines > > described above are a major obstacle. Does anyone know a > way around them? > > The -u flags arise because there is a circular dependency > between the RTS (libHSrts.a) and the base package > (libHSbase.a). The RTS refers to a few datatypes and > functions in the base package, for instance the constructors > for True and False, I#, C# and so on, and some exceptions > that the RTS automatically raises for certain events (e.g. > stack overflow, non-termination). > > One way to avoid needing the -u flags would be to link the > base package twice, but that would slow down linking, and > twice might not be enough. > With shared libraries there's no problem, because we always > just link the whole library, this is only an issue with > static libraries. > > So for building a static Haskell library, can't you just link > the RTS and base package together in a single .a file? > > Cheers, > Simon > _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
