This is caused by OS X's libiconv being entirely CPP macros, the FFI
has nothing to get hold of. IIRC there's a ghc bug report open for it.
Bob
On 1 Feb 2009, at 18:57, Antoine Latter wrote:
Funny story,
If I do the following three things, I get errors on my Intel Mac OS
10.5:
* Build an executable with Cabal
* Have the executable have a build-dep of pcre-light in the .cabal
* use haskeline in the executable itself
I get crazy linker errors relating to haskeline and libiconv:
Shell output:
$ cabal clean && cabal configure && cabal build
cleaning...
Configuring test-0.0.0...
Preprocessing executables for test-0.0.0...
Building test-0.0.0...
[1 of 1] Compiling Main ( test.hs, dist/build/test/test-
tmp/Main.o )
Linking dist/build/test/test ...
Undefined symbols:
"_iconv_open", referenced from:
_s9Qa_info in libHShaskeline-0.6.0.1.a(IConv.o)
"_iconv_close", referenced from:
_iconv_close$non_lazy_ptr in libHShaskeline-0.6.0.1.a(IConv.o)
"_iconv", referenced from:
_sa0K_info in libHShaskeline-0.6.0.1.a(IConv.o)
ld: symbol(s) not found
collect2: ld returned 1 exit status
<<<<<
But all three above conditions need to be true - if I build using 'ghc
--make' everything works great, even if the executable imports
pcre-light and haskeline. If I have build-deps on haskeline and
pcre-light, but don't actually import haskeline, everything also works
great.
Here are the files I've used:
test.hs:
import System.Console.Haskeline
main :: IO ()
main = print "Hello!"
<<<<<
test.cabal
Name: test
version: 0.0.0
cabal-version: >= 1.2
build-type: Simple
Executable test
main-is: test.hs
build-depends: base, haskeline, pcre-light>=0.3
<<<<<
Is there some way I need to be building haskeline on OS X to make
this work?
Thanks,
Antoine
more details:
$ cabal --version
cabal-install version 0.6.0
using version 1.6.0.1 of the Cabal library
<<<<<
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version
6.10.0.20081007
<<<<<
links:
pcre-light:
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/pcre-light
haskeline: http://hackage.haskell.org/cgi-bin/hackage-scripts/package/haskeline
_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
_______________________________________________
Haskell-Cafe mailing list
Haskell-Cafe@haskell.org
http://www.haskell.org/mailman/listinfo/haskell-cafe
