Problems creating a DLL with ghc-5.02.1

Sigbjorn Finne
Thu, 6 Dec 2001 07:35:23 -0800

Yes, if you're willing to do the following:

- only use the --mk-dll option when linking together object
   files & archives (i.e., don't try compile a Haskell source
   file and create its DLL during the same invocation of GHC).

   (Remembering to include the _stub.o files too when linking).

- modify your package.conf file, editing the entry for the 'rts'
   package to instead of having a library_dirs equal to
   ["$libdir"], have it be ["$libdir", "$libdir/gcc-lib"]

   Alternatively, add the command-line option "-Lc:/ghc/ghc-5.02.1/gcc-lib"
   to your ghc-5.02.1 (where c:/ghc/ghc-5.02.1 is wherever you've
   got GHC installed).


----- Original Message -----
From: "Lehti, Patrick " <>
To: <>
Sent: Thursday, December 06, 2001 06:04
Subject: Problems creating a DLL with ghc-5.02.1

> Hi,
> I tried to wrap a Haskell application in a DLL using ghc-5.02.1. But this
> not working, with cygwin in path I got this error message:
> /usr/lib/mingw/libmingw32.a(gccmain.o)(.text+0x88):gccmain.c: multiple
> definition of `__main'
> /usr/lib/libm.a(ds00023.o)(.text+0x0): first defined here
> ... and without cygwin in path, it could not find "dllwrap" and "dlltool".
> Is there any solution for this problem?
> Patrick