-main-is flag in {-# OPTIONS #-} pragma not fully supported
The -main-is
flag is dynamic an may therefore be placed inside the {-# OPTIONS #-}
pragma. Version 6.8.3 of runghc respects this flag (that is, runghc works as expected), but this cannot be said of ghc.
Example file T.hs
{-# OPTIONS -main-is T.main #-}
module T where
main :: IO ()
main = putStrLn "Hello world"
Example execution
$ ghc --make -o t T.hs
[1 of 1] Compiling T ( T.hs, T.o )
Warning: output was redirected with -o, but no output will be generated
because there is no Main module.
Additional notes
This bug is related to ticket #1312 (closed), but the difference is that ticket #1312 (closed) only addressed runghc, not ghc.
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |