-main-is should be a link time option, not compile time
The -main-is flag specifies which function name to use as main. However, when doing separate compilation:
ghc -c Foo.hs
ghc Foo.oYou have to give the -main-is in the first step - the compilation, rather than in the second step, the linking. It feels like this flag should be a link time option, and would give greater flexibility allowing one object file to be used in multiple projects with different main commands.
If you compile with ghc --make this issue isn't really a problem.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.10.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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