Re: Main-Is not creating executable

On Tue, 2009-01-20 at 20:30 +0000, Alistair Bayley wrote:

2009/1/20 Alistair Bayley :

...

I have this in Takusen.cabal:

Executable miniunit_tests Main-Is: Test/MiniUnit/Main.hs Build-Depends: base, mtl Extensions: CPP CPP-Options: "-DNEW_EXCEPTION"

(as well as the Library section). When it builds, the modules compile fine, but then I get:

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

My fault. Turns out the module in Test/MiniUnit/Main.hs must be just Main, not Test.MiniUnit.Main i.e. module Main where...

Right. See http://hackage.haskell.org/trac/hackage/ticket/179

But the second question still stands: can I selectively build the various targets in the .cabal file?

Not yet, sorry. This is something that we will be able to do easily with the Cabal-2.x features, though we may well be able to do it before then, at least for "big" targets like executables and libs. So it's worth filing a feature request ticket. I usually ask for suggestions for the user interaction but in this case the obvious seems to be: cabal build miniunit_tests Btw, what you really want here is proper support for testsuites, rather than executable: http://hackage.haskell.org/trac/hackage/ticket/215 Duncan