doh, i was just missing "where" after module... in my .chs file, and
some other syntax errors...
On 9/30/06, Anatoly Yakovenko
I am trying to figure out how to use c2hs, so I wrote a wrapper for asin from math.h: $ cat ASin.chs module MySin (mysin)
import C2HS
#include "math.h"
asin::Double -> Double asin xx = {#call fun asin#} xx
and this is my main: $ cat Main.hs module Main where
import ASin
main = do putStrLn $ show $ asin 0.5
`c2hs ASin.chs` generates this:
$ cat ASin.hs -- GENERATED by C->Haskell Compiler, version 0.14.5 Travelling Lightly, 12 Dec 2005 (Haskell) -- Edit the ORIGNAL .chs file instead!
{-# LINE 1 "ASin.chs" #-}module MySin (mysin)
import C2HS
asin::Double -> Double asin xx = asin xx
foreign import ccall safe "ASin.h asin" asin :: (CDouble -> CDouble)
but, when i try to build the wone thing, i get an error that i dont understand:
$ ghc -v --make -fffi Main.hs Glasgow Haskell Compiler, Version 6.4.2, for Haskell 98, compiled by GHC version 6.4.2 Using package config file: /usr/lib/ghc-6.4.2/package.conf Hsc static flags: -static *** Chasing dependencies: Chasing modules from: Main.hs *** Deleting temp files Deleting:
ASin.chs:2:0: parse error on input `import'
So, what am i missing?