Installing csound-expression-5.2.2

[ndcroos]

When I execute cabal install csound-expression i get the followwing error message? What is going wrong? I'm still new to Haskell. I use Cabal version 1.16 if that helps.

src/Csound/IO.hs:115:25: Overlapping instances for RenderCsd (SE a) arising from a use of renderCsdBy' Matching instances: instance Sigs a => RenderCsd a -- Defined at src/Csound/IO.hs:93:31 instance Sigs a => RenderCsd (SE a) -- Defined at src/Csound/IO.hs:96:31 In the expression: renderCsdBy opt (fromSource a) In an equation forrenderCsdBy': renderCsdBy opt a = renderCsdBy opt (fromSource a) In the instance declaration for `RenderCsd (Source a)'

src/Csound/IO.hs:118:25: Overlapping instances for RenderCsd (SE a) arising from a use of renderCsdBy' Matching instances: instance Sigs a => RenderCsd a -- Defined at src/Csound/IO.hs:93:31 instance Sigs a => RenderCsd (SE a) -- Defined at src/Csound/IO.hs:96:31 In the expression: renderCsdBy opt (fromSourceSE a) In an equation forrenderCsdBy': renderCsdBy opt a = renderCsdBy opt (fromSourceSE a) In the instance declaration for `RenderCsd (Source (SE a))'

src/Csound/IO.hs:121:27: Overlapping instances for RenderCsd (SE ()) arising from a use of renderCsdBy' Matching instances: instance RenderCsd (SE ()) -- Defined at src/Csound/IO.hs:90:30 instance Sigs a => RenderCsd a -- Defined at src/Csound/IO.hs:93:31 instance Sigs a => RenderCsd (SE a) -- Defined at src/Csound/IO.hs:96:31 In the expression: renderCsdBy opt In the expression: renderCsdBy opt $ do { (ui, _) <- unSource src; panel ui } In an equation forrenderCsdBy': renderCsdBy opt src = renderCsdBy opt $ do { (ui, _) <- unSource src; panel ui }

src/Csound/IO.hs:126:27: Overlapping instances for RenderCsd (Source ()) arising from a use of renderCsdBy' Matching instances: instance Sigs a => RenderCsd a -- Defined at src/Csound/IO.hs:93:31 instance Sigs a => RenderCsd (Source a) -- Defined at src/Csound/IO.hs:114:31 instance RenderCsd (Source ()) -- Defined at src/Csound/IO.hs:120:30 In the expression: renderCsdBy opt (joinSource src) In an equation forrenderCsdBy': renderCsdBy opt src = renderCsdBy opt (joinSource src) In the instance declaration for `RenderCsd (Source (SE ()))' Failed to install csound-expression-5.2.2 cabal: Error: some packages failed to install: csound-expression-5.2.2 failed during the building phase. The exception was: ExitFailure 1

[anton-k]

What is the version of your GHC?

[ndcroos]

The GHC version is 7.6.3.

I assume that the issue is just outdated tools. However, I have trouble with updating Cabal and GHC to newer version.

[anton-k]

I'm sorry to say but it's veeery old. By the way what's your system? How do you install ghc+cabal? Maybe I can help you to update the Haskell stuff and move on.

[ndcroos]

I use an old laptop that runs Ubuntu 14.04 (Trusty). I installed it a couple of years ago but did not use it. I do not remember how I installed it precisely then. I have tried installing csound-expression with Haskell Platform (following the instruction in the introduction). According to https://packages.ubuntu.com/trusty/haskell-platform the GHC version is 7.6.3. I assume I could upgrade Ubuntu and try starting from scratch with installing Haskell. I think my other option is using stack and not Haskell Platform.

[anton-k]

Ok, You can install any version of GHC with this PPA

https://launchpad.net/~hvr/+archive/ubuntu/ghc

add PPA and then install as in the instruction. It's very handy to test the libs and apps against different GHCs. Also after installation you would need to create a link to the needed version.

My lib currently doesn't support the most modern 8.2. So if you want to try csound-expression it's better to choose GHC 8.0.2, with cabal-install that suits the version of GHC.

I hope this helps!