Backport instructions

hadrian.settings

stage1.*.ghc.hs.opts += -finfo-table-map -fdistinct-constructor-tables          
stage1.ghc-bin.ghc.link.opts += -eventlog                                                  

instructions.md

These instructions will tell you how to build GHC 8.10.2 with support for the -hi, -finfo-table-map and -fdistinct-constructor-tables flags.

First checkout this GHC Branch: https://gitlab.haskell.org/mpickering/ghc/-/commits/ghc-con-info-backport. Then:

1. mkdir _build, Copy the hadrian.settings file into _build.
2. git submodule update --init
3. perl boot
4. ./configure
5. ./hadrian/build.cabal.sh -j4

Viewing the profile

If you wish to view the profile, use eventlog2html version 0.9.0 or newer.

Found it https://gitlab.haskell.org/mpickering/ghc/-/blob/ghc-con-info-backport/hadrian/doc/user-settings.md