cabal install with GHC 8.0.1 on Windows sends garbled CC env var

[melted]

I was trying to do a cabal install of Idris with GHC 8.0.1. It failed when it came to network with

checking for gcc... C:\Apps\GHC-80~1.1ӵĜӵӵ▒Ě粩ࡤӵ ...much garbage

And it obviously fails to find a C compiler with that filename.

I reran with -v3 and apparently it is passed a bad CC env var

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It appears both on Appveyor and my dev machine. I have seen it for network and old-time.

It only appears with cabal install, I can cabal build and register it with no problem. GHC 7.10.3 works without problems.

[ezyang]

If you update to Cabal HEAD this will be fixed; the fix was #3657

[melted]

Thanks, we can't really use HEAD in idris, but I'll just run with 7.10.3 until it gets out in the wild.

[ezyang]

You can also work around this problem by renaming your GHC-8.0.1 folder to something like GHC8, so that Windows shortens the path to something which is shorter than the path in question.

[ndmitchell]

I just ran into this, which caused much confusion. Is there any plan to make a new binary release with the issue fixed?

[23Skidoo]

@ndmitchell Yes, it will be in the next 1.24 point release.

[ndmitchell]

@23Skidoo - any idea of an approximate timeline? Not rushing you, just trying to figure out what workarounds to use.

[23Skidoo]

@ndmitchell I'll try to get it out this week; if not, it'll be out together with GHC 8.0.2 at the latest.