But it fails this way instead, because 3.x works differently. Probably should have checked docs given it's a new major version of cabal-install.
On Mon, Apr 15, 2019 at 6:44 PM Simon Peyton Jones <simo...@microsoft.com> wrote: > Simon has a cabal-install that claims to be 3.0.0.0 > > > Ah yes, I installed it thus: > > · sudo add-apt-repository ppa:hvr/ghc-wsl > > · sudo apt-get update > > · sudo apt install cabal-install-3.0 > > > > Why did I do that? Because earlier versions of cabal crashed with a > mysterious “The futex facility returned an unexpected” something like this > https://github.com/Microsoft/WSL/issues/3881 or this > https://github.com/reflex-frp/reflex-platform/issues/293 > > > > Apparently Herbert’s 3.0 does not fail in this way. > > > > Simon > > > > *From:* ghc-devs <ghc-devs-boun...@haskell.org> *On Behalf Of *Brandon > Allbery > *Sent:* 15 April 2019 23:24 > *To:* Oleg Grenrus <oleg.gren...@iki.fi> > *Cc:* ghc-devs@haskell.org Devs <ghc-devs@haskell.org> > *Subject:* Re: Cabal woes > > > > The facts here are in the original message: Simon has a cabal-install that > claims to be 3.0.0.0, and is treating "install" as "v2-install". So > evidently *someone* has released it in some fashion, perhaps > inappropriately. > > > > On Mon, Apr 15, 2019 at 6:22 PM Oleg Grenrus <oleg.gren...@iki.fi> wrote: > > cabal-install-3 isn't released. Please check the facts. > > - Oleg > > On 16.4.2019 1.17, Brandon Allbery wrote: > > I vaguely recall seeing that bug come up with respect to v2-install. And > in fact am a bit surprised that 3 has been released, since this is > highlighting that neither it nor the Haskell ecosystem is quite ready for > it. > > > > I'd also have expected (and thought I'd seen) "cabal install" in recent > 2.x warn that it would be "v1-install" in the future. > > > > On Mon, Apr 15, 2019 at 6:13 PM Simon Peyton Jones <simo...@microsoft.com> > wrote: > > Aha! That works. I would never in a million years have found that by > myself. Thank you. > > > > But > > - It is terribly mysterious that “cabal install hspec” doesn’t, well, > install hspec. > - It must surely be a bug that “cabal install –lib hspec” simply > crashes. > > > > Simon > > > > *From:* Brandon Allbery <allber...@gmail.com> > *Sent:* 15 April 2019 23:03 > *To:* Simon Peyton Jones <simo...@microsoft.com> > *Cc:* ghc-devs@haskell.org > *Subject:* Re: Cabal woes > > > > Yes, I think a lot of documentation will need to be updated because this. > You want "cabal v1-install" with cabal 3. > > > > On Mon, Apr 15, 2019 at 6:00 PM Simon Peyton Jones <simo...@microsoft.com> > wrote: > > 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 > <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.haskell.org%2FCabal-Install&data=02%7C01%7Csimonpj%40microsoft.com%7C2fdeabc1bf0049584e9708d6c1f11cb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909638652533306&sdata=pJb05mqT1A0ceYxJ26%2FkMhJCYQ9S7%2Bupn89xZSl7y2I%3D&reserved=0> > 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 > <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.haskell.org%2FCabal%2FHow_to_install_a_Cabal_package&data=02%7C01%7Csimonpj%40microsoft.com%7C2fdeabc1bf0049584e9708d6c1f11cb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909638652533306&sdata=mBDZQXgEtvQLuiTCFCKLtREPmImnr3ljNTHq%2B4A4Nf4%3D&reserved=0>, > which in turn are pointed to from the main Cabal home page > https://www.haskell.org/cabal/ > <https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.haskell.org%2Fcabal%2F&data=02%7C01%7Csimonpj%40microsoft.com%7C2fdeabc1bf0049584e9708d6c1f11cb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909638652533306&sdata=scKnLWjyw1X5N1VPpBukOq4PXDoeHcYTXa3gT5bKK7E%3D&reserved=0> > . > > > > 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> 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 > 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%7C2fdeabc1bf0049584e9708d6c1f11cb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909638652689564&sdata=%2B2GyFeiS7e0m8Agu5CfZKCLocpx9COJJMuSa6K6m5RM%3D&reserved=0> > > > > > -- > > brandon s allbery kf8nh > > allber...@gmail.com > > > > > -- > > brandon s allbery kf8nh > > allber...@gmail.com > > > > > -- > > brandon s allbery kf8nh > > allber...@gmail.com > > > > _______________________________________________ > > ghc-devs mailing list > > 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%7C2fdeabc1bf0049584e9708d6c1f11cb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909638652689564&sdata=%2B2GyFeiS7e0m8Agu5CfZKCLocpx9COJJMuSa6K6m5RM%3D&reserved=0> > > _______________________________________________ > ghc-devs mailing list > 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%7C2fdeabc1bf0049584e9708d6c1f11cb5%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636909638652689564&sdata=%2B2GyFeiS7e0m8Agu5CfZKCLocpx9COJJMuSa6K6m5RM%3D&reserved=0> > > > > > -- > > brandon s allbery kf8nh > > allber...@gmail.com > -- brandon s allbery kf8nh allber...@gmail.com
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