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| author | Matthew Pickering <matthewtpickering@gmail.com> | 2022-12-07 11:13:20 +0000 |
|---|---|---|
| committer | Matthew Pickering <matthewtpickering@gmail.com> | 2023-01-04 11:58:42 +0000 |
| commit | 32e264c1a11e6356bb045371b87a3736df19e792 (patch) | |
| tree | 4563b936dc6c6971c9aa4f4cc39247543955bbe3 | |
| parent | 53a6ae7a8f819d1105aa190dc9cce215cdbcc6dc (diff) | |
| download | haskell-32e264c1a11e6356bb045371b87a3736df19e792.tar.gz | |
hadrian: Document using GHC environment variable to select boot compiler
Fixes #22340
| -rw-r--r-- | hadrian/README.md | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/hadrian/README.md b/hadrian/README.md index 0be3546a67..c01f806a8e 100644 --- a/hadrian/README.md +++ b/hadrian/README.md @@ -164,6 +164,18 @@ build stage2:lib:text build stage1:exe:haddock ``` +#### Choosing the compiler used to build Hadrian + +The `GHC` environment variable can be used to control which GHC is used to build hadrian. By +default the version of GHC on your path is used to build hadrian. +This can be a different version of GHC to the one you want to use as the boot compiler (which +is selected during ./configure). + +``` +GHC=$(which ghc-9.4.2) ./hadrian/build +-- hadrian is built using ghc-9.4.2 +``` + #### Fast feedback using ghci Running the `./hadrian/ghci` script will load the main compiler into |