Simon, If you want to see all command lines, you can pass '--verbose' or '-V' flag to Hadrian and it will then print out everything it does.
But you can also choose which particular command lines to print in UserSettings, see: https://github.com/snowleopard/hadrian/blob/master/doc/user-settings.md#verbose-command-lines So, you can do: verboseCommand = input "//GHC/Real.hs" Or, alternatively, verboseCommand = output "//GHC/Real.hi" Both should produce the same result (in theory). In general, we have the following documents on Hadrian: The README: https://github.com/snowleopard/hadrian/blob/master/README.md How to use UserSettings: https://github.com/snowleopard/hadrian/blob/master/doc/user-settings.md An overview of build flavours: https://github.com/snowleopard/hadrian/blob/master/doc/flavours.md I hope the more Hadrian gets used, the more complete the documentation will become. Cheers, Andrey From: Simon Peyton Jones [mailto:simo...@microsoft.com] Sent: 30 August 2018 12:19 To: Simon Peyton Jones <simo...@microsoft.com>; Alp Mestanogullari <a...@well-typed.com>; Andrey Mokhov <andrey.mok...@newcastle.ac.uk> Cc: ghc-devs <ghc-devs@haskell.org> Subject: RE: Hadrian Sigh. As an inconvenient workaround, I tried adding {-# OPTIONS_GHC -dverbose-core2core #-} to GHC.Real, and then doing cabal new-run hadrian -- -c -j4 --flavour=quick --directory=".." in hadrian/ That did recompile GHC.Real - but all the debug output disappeared! I tried adding {-# OPTIONS_GHC -ddebug-output #-} as well, but that didn't work. I'm stuck - any ideas? Simon From: ghc-devs <ghc-devs-boun...@haskell.org> On Behalf Of Simon Peyton Jones via ghc-devs Sent: 30 August 2018 12:12 To: Alp Mestanogullari <a...@well-typed.com>; Andrey Mokhov <andrey.mok...@newcastle.ac.uk> Cc: ghc-devs <ghc-devs@haskell.org> Subject: Hadrian Alp, Andrey The old build system printed out every command line; and I often copy-paste that info to build single modules. Eg currently, when trying to understand #15570 I see a suspicious GHC.Real.hi. So I want to manually recompile GHC.Real (from base), adding some debug flags. How can I get the right command line to do that from the build log? Where is the "how to use Hadrian" wiki page? I know you've been writing one. Simon _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
