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I compiled my helloworld.hs and got a helloworld.o file, I tried ./helloworld, but it didn’t work, so what is the right way to execute the helloworld?
I am using cygwin, I just write down $ ghc –make helloworld.hs and I get helloworld.hi, helloworld.exe.manifest, helloworld.o files, I don’t know what do I need to do next…
As you haven’t specified anything about how you compiled, such as for instance what compiler you’re using, we can only guess.
The common way to get a .o (object) file out of ghc is using the -c switch; as the manual says, that means “do not link”. The mnemonic is “compile only“. Without linking, you have only a portion of a program, and it cannot be executed. Precisely what it needs to be linked against will depend on the particular object file, and some of that is filled in by default if you simply let the compiler run the linker. Linking separately is more complicated.