ghc编译错误，但runghc可以工作

Question

UPDATE SOLVED

I updated to Haskell Platform 2011.2.0.1 and GHC 7.0.3 and now it works!!

I have the following haskell file named "webscrap2.hs". I can execute "runghc webscrap2.hs" and it works fine. However when I compile the file I get an error.

webscrap2.hs

import Text.HTML.TagSoup
import Network.Curl (curlGetString, URLString)

main :: IO ()
main = do html <- openURL "https://github.com/languages/Haskell/created"
          let links = linkify html
          print links

openURL :: URLString -> IO String
openURL target = fmap snd $ curlGetString target []

linkify :: String -> [String]
linkify l = [x | TagOpen "a" atts <- parseTags l, (_,x) <- atts]

ghc --version

The Glorious Glasgow Haskell Compilation System, version 6.12.3

ghc -o webscrap2 webscrap2.hs

webscrap2.o: In function `r17I_info':
(.text+0x1fe): undefined reference to `tagsoupzm0zi12_TextziHTMLziTagSoupziParser_parseTags_closure'
webscrap2.o: In function `r17I_info':
(.text+0x204): undefined reference to `tagsoupzm0zi12_TextziStringLike_zdfStringLikeZMZN_closure'
webscrap2.o: In function `s1eb_info':
(.text+0x6fc): undefined reference to `curlzm1zi3zi7_NetworkziCurl_curlGetString_closure'
webscrap2.o: In function `s1ed_info':
(.text+0x927): undefined reference to `__stginit_curlzm1zi3zi7_NetworkziCurl_'
webscrap2.o: In function `s1ed_info':
(.text+0x933): undefined reference to `__stginit_tagsoupzm0zi12_TextziHTMLziTagSoup_'
webscrap2.o: In function `r17I_srt':
(.data+0x90): undefined reference to `tagsoupzm0zi12_TextziHTMLziTagSoupziParser_parseTags_closure'
webscrap2.o: In function `r17I_srt':
(.data+0x98): undefined reference to `tagsoupzm0zi12_TextziStringLike_zdfStringLikeZMZN_closure'
webscrap2.o: In function `s1ed_srt':
(.data+0xf8): undefined reference to `curlzm1zi3zi7_NetworkziCurl_curlGetString_closure'
collect2: ld returned 1 exit status

Any pointers what the problem might be?

Answer 1

您可能要尝试更新GHC和正在使用的软件包，请查看是否有帮助。

Answer 2

假设你已经运行cabal install tagsoup那么它是一个小问题--make ：

 ghc -o webscrap2 webscrap2.hs --make