Thanks. But alas I have no clue about whether I want a v1-install or a v2-install, nor how to achieve them if I knew what they were. I just want to install ‘hspec’ so that I can use it when compiling a program. How would I do that?
The instructions here https://wiki.haskell.org/Cabal-Install just say “cabal install hspec” which is what I tried. Those instructions are pointed to from here https://wiki.haskell.org/Cabal/How_to_install_a_Cabal_package, which in turn are pointed to from the main Cabal home page https://www.haskell.org/cabal/. I must be missing something. Simon From: Brandon Allbery <allber...@gmail.com> Sent: 15 April 2019 22:54 To: Simon Peyton Jones <simo...@microsoft.com> Cc: ghc-devs@haskell.org Subject: Re: Cabal woes I think you wanted v1-install to install a library into the user package database, since your cabal is 3.x and the v2-* commands are now the default (that is, you did what used to be cabal new-install or cabal v2-install). On Mon, Apr 15, 2019 at 5:47 PM Simon Peyton Jones via ghc-devs <ghc-devs@haskell.org<mailto:ghc-devs@haskell.org>> wrote: I’m trying to install ‘hspec’ on my WSL (Windows subsystem for Linux) system. But I fail; see below. For some reason cabal complains about installing a library. (That seems peculiar – isn’t that what cabal is for?) But it helpfully suggests adding –lib. Alas, cabal then crashes outright, which should never happen. So I’m stuck. What should I do? Thanks Simon simonpj@MSRC-9870733:~$ cabal --version cabal-install version 3.0.0.0 compiled using version 3.0.0.0 of the Cabal library simonpj@MSRC-9870733:~$ cabal install hspec Resolving dependencies... Up to date Warning: You asked to install executables, but there are no executables in target: hspec. Perhaps you want to use --lib to install libraries instead. simonpj@MSRC-9870733:~$ cabal install --lib hspec Resolving dependencies... Up to date Distribution/Simple/GHC.hs:1959:5-56: Irrefutable pattern failed for pattern Just ghcPkgProg simonpj@MSRC-9870733:~$ which ghc /opt/ghc/bin/ghc simonpj@MSRC-9870733:~$ which ghc-pkg /opt/ghc/bin/ghc-pkg simonpj@MSRC-9870733:~$ _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org<mailto:ghc-devs@haskell.org> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmail.haskell.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fghc-devs&data=02%7C01%7Csimonpj%40microsoft.com%7C49de1a60a36e4a04bbe208d6c1ecdac9%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909620364700618&sdata=dMUKGqIICFPisw%2Feskzb98WxcG9kfNFMOkZfd9fB7YU%3D&reserved=0> -- brandon s allbery kf8nh allber...@gmail.com<mailto:allber...@gmail.com>
_______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
