[Haskell-cafe] GHC and MinGW

[José Romildo Malaquias]

On Sat, Feb 12, 2011 at 01:12:22PM -0200, José Romildo Malaquias wrote:
> Hello.
> 
> How do I make ghc use my installation of MinGW on Windows? I have
> ghc-7.0.1 installed and the latest MinGW packages. I want ghc to
> automatically find libraries installed by the MinGW installer.
> 
> Currently I am getting the error with my application:
> 
> Linking Gui.exe ...
> C:\Program Files\Haskell\iconv-0.4.1.0\ghc-7.0.1/libHSiconv-0.4.1.0.a(hsiconv.o):hsiconv.c:(.text+0x8): undefined reference to `libiconv_open'
> 
> where libiconv has been installed with the command
> 
> mingw-get install mingw32-libiconv
> 
> and the library is available at c:/devel/MinGW/lib/

Looking at iconv.cabal from the iconv package, I found this:

  if os(darwin) || os(freebsd)
    -- on many systems the iconv api is part of the standard C library
    -- but on some others we have to link to an external libiconv:
    extra-libraries: iconv

So the problem is that the extra library iconv is not been considered
for the windows os.

Changing the line above to consider the windows os solves the problem:

  if os(darwin) || os(freebsd) || os(windows)
    -- on many systems the iconv api is part of the standard C library
    -- but on some others we have to link to an external libiconv:
    extra-libraries: iconv


Therefore the mantainer of the iconv package should fix this issue.

Romildo