clawsie:

i have a program tb.hs:

--- module Main where import Network.URI (URI(..), URIAuth(..), parseURI)

myFunc :: String -> Maybe URI myFunc u = parseURI u

main = do { return () } ---

when i attempt to build it with ghc, i get the following output:

tb.o: In function `Main_myFunc_info': (.text+0x11): undefined reference to `networkzm2zi0_NetworkziURI_parseURI_closure' tb.o: In function `Main_myFunc_srt': (.rodata+0x0): undefined reference to `networkzm2zi0_NetworkziURI_parseURI_closure' collect2: ld returned 1 exit status

any clue why? i would send this to the ghc list but i presume my issue is due to a trivial misunderstanding of the language

Assuming you have the Network package installed, you need to tell the compile to link in the extra network library. The above is a linker error. Adding --make or -package network to the command line should do the trick. -- Don