Thanks for the link Andy, this definitely looks like the right I will ultimately need to take. I just found out that plugins does not install very well on Windows, which is something I need to provide good support for with wai-handler-devel. Michael On Tue, Feb 1, 2011 at 1:15 PM, Andy Stewart wrote:

Hi Michael,

I have write some dynamic-loading code for my Manatee project (http://hackage.haskell.org/package/manatee)

Dynload.hs use GHC API, if you interested it, you can read source code:

https://patch-tag.com/r/AndyStewart/manatee-core/snapshot/current/content/pr...

Cheers,

 -- Andy

Michael Snoyman writes:

...

Hi Andy,

plugins *is* working in general for me for some trivial test cases. It's specifically this use case with WAI that's causing trouble, which implies to me I'm misusing the API somehow.

Michael

On Tue, Feb 1, 2011 at 4:22 AM, Andy Stewart wrote:

...

Hi Michael,

plugins use it's own function instead GHC API, so it's easy to break with new version GHC.

 -- Andy

Michael Snoyman writes:

...

Hi all,

I'm trying to convert wai-handler-devel to use plugins instead of hint, but cannot even get some basic usages to work properly. I've put together a minimal example that loads a WAI application from a separate file and runs it, but this immediately causes the program to crash saying:

loader: internal error: stg_ap_v_ret     (GHC version 6.12.3 for i386_unknown_linux)     Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Is this an actual bug in GHC, or am I misusing the plugins package?

The two source files:

MyModule.hs {-# LANGUAGE OverloadedStrings #-} module MyModule where

import Network.Wai import Data.ByteString.Lazy.Char8 ()

myapp _ = responseLBS status200 [("Content-Type", "text/plain")] "myapp"

loader.hs import System.Plugins.Make import System.Plugins.Load import Network.Wai.Handler.Warp (run)

main :: IO () main = do     MakeSuccess _ obj <- makeAll "MyModule.hs" []     LoadSuccess _ app <- load_ obj [] "myapp"     run 3000 app

Thanks, Michael

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