On 27. 6. 2016 23:33, Simon Peyton Jones via ghc-devs wrote: > 1. I just left the machine for 10-15 mins and lo! the shell windows opened > up. It just took a loooong time.
I could be something with Active Directory. Cygwin (upon which is MSYS2 based) integrates with AD, but there are numerous (google-able) reports of huge slowdowns related to this. > At this point, starting a new shell no longer took a long time. It all > seemed to be working. Also don't forget to exclude `C:\msys64` from any anti-virus scans. > 2. I then ran pacman -Syuu as instructed on the installation page: > https://sourceforge.net/p/msys2/wiki/MSYS2%20installation/ I'm afraid you misread the instructions. You should run `update-core` first to upgrade to the newer pacman that handles `pacman -Syuu` correctly. (New installer packages with an up-to-date pacman are planned.) > The log of what happened is below. There are numerous failures involving > Cygwin, which I do not have installed, at least not so far as I know. I do > not know if these failures matter. They might. See below. > 3. After this step, starting a shell failed altogether with > "c:/msys64/mingw64_shell.bat is not recognised as an internal or external > command". And sure enough, there is no such file. Presumably it existed in > step 1. So perhaps step 2 deleted it? If the post-install script for `filesystem` were able to run, it would inform you that `*_shell.bat` are deprecated and were removed. I see you have `msys2-launcher-git` installed -- you can then use `C:\msys64\mingw64.exe` (and even pin it to the taskbar). > 4. As you mention, I then tried msys2_shell.cmd. It worked -- with a > noticeable delay of 5 seconds or so. May still be AD-related. > * should I worry about all those install errs I recommend staying on the safe side and nuke the installation. Alternatively, reinstall the packages that had failures (`pacman -S gcc-libs gettext gmp ...`). > * how can I debug what's happening with > that long delay `/etc/nsswitch.conf` allows for some configuration. See <https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-nsswitch-pwdgrp>. > * Should I nuke the start menu shortcuts that > the msys64 installer so carefully installed > in favour of msys2_shell.cmd? Yes or see above. Note that you might need `msys2_shell.cmd -mingw64` instead (not sure if it matters for GHC). -- David Macek
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