[ ghc-Bugs-686620 ] ghc --make -no-hs-main -o fails

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Bugs item #686620, was opened at 2003-02-14 16:34
You can respond by visiting: 
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Category: Driver
Group: 5.04.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Martin Norbäck (norpan)
Assigned to: Nobody/Anonymous (nobody)
Summary: ghc --make -no-hs-main -o fails

Initial Comment:
This is a very special case, I admit, but anyway:

I use

ghc --make -no-hs-main Haskell.hs c.o -o program

to link a program, where c.o is a c object file
defining main, and it calls functions in Haskell.hs. I
want it to link correctly. However ghc complains: 

Warning: output was redirected with -o, but no output
will be generated because there is no Main module.

This is even though there is the flag -no-hs-main.

If i create a dummy Main module like this:

module Main where
import Haskell
main = undefined

and do

ghc --make -no-hs-main Main.hs c.o -o program

the program compiles and work fine.

Since there is this workaround I don't think it's a
serious bug, because it's a rare case, but I thought
you'd want to know anyway.



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