I solved the problem. The eclipse plugin built the command line by creating an array with all the tokens and using it as a parameter for the Java exec. One of the items in the array was an empty string; I don't know exactly why, but with this ghc thought it was receiving more than a source file argument. Well, that's it... don't know if it's important to the ghc team, but the funny thing is that it worked pre-6.2.1. --- []s, Andrei de A. Formiga On Sat, 10 Jul 2004 18:12:36 -0300, Andrei Formiga wrote:

Hi,

I'm working with the Haskell plugin for eclipse, but when building a project the compiler outputs the following error:

ghc-6.2.1: can't apply -o to multiple source files Usage: For basic information, try the `--help' option.

and this is the command line (or should be):

ghc --make -odir /home/ktulu/eclipse/runtime-workspace/Hello/out -hidir /home/ktulu/eclipse/runtime-workspace/Hello/out -o /home/ktulu/eclipse/runtime-workspace/Hello/bin/theResult Main.hs

funny enough, when using the same command line at a terminal, it compiles ok.

Does someone have any thought or ideas on why this is happening ?

I'm running GHC 6.2.1 on linux (Fedora Core 2, glibc 2.3), installed from RPM. The same problem was reported on other linux versions and on Mac OS X. It worked fine on previous versions.

Thanks in advance for any help.

-- []s, Andrei de A. Formiga

-- []s, Andrei de A. Formiga