Drop --configure from Hadrian docs

1 files changed, 2 insertions, 23 deletions

diff --git a/hadrian/README.md b/hadrian/README.md
index 20020c3b92..a815039e7f 100644
--- a/hadrian/README.md
+++ b/hadrian/README.md
@@ -32,9 +32,7 @@ hadrian/build.bat -j
 ```
 
 Here flag `-j` enables parallelism and is optional. We will further refer to the
-build script simply as `build`. Note that Hadrian can also run the `boot` and
-`configure` scripts automatically for you if you pass the flag `--configure`,
-or simply `-c`. See the overview of command line flags below.
+build script simply as `build`.
 
 Notes:
 
@@ -78,16 +76,6 @@ for GHC developers who want to build GHC in different ways or at different
 commits, from the same source directory, and have the build products sit in
 different, isolated folders.
 
-* `--configure` or `-c`: use this flag to run the `boot` and `configure` scripts
-automatically, so that you don't have to remember to run them manually as you
-normally do when using Make (typically only in the first build):
-    ```bash
-    ./boot
-    ./configure # On Windows run ./configure --enable-tarballs-autodownload
-    ```
-    Beware that with this flag Hadrian may do network I/O on Windows to download
-    necessary tarballs, which may sometimes be undesirable.
-
 * `--flavour=FLAVOUR`: choose a build flavour. The following settings are
 currently supported: `default`, `quick`, `quickest`, `perf`, `prof`, `devel1`
 and `devel2`. As an example, the `quickest` flavour adds `-O0` flag to all GHC
@@ -227,7 +215,7 @@ you can tell hadrian to build the compiler and also run the linters:
 * `build clean` removes all build artefacts.
 
 * `build distclean` additionally remove the mingw tarballs and fs* files created
-  by configure.
+  by `configure`.
 
 * `build -B` forces Shake to rerun all rules, even if the previous build results
 are still up-to-date.
@@ -339,15 +327,6 @@ Troubleshooting
 
 Here are a few simple suggestions that might help you fix the build:
 
-* If Hadrian fails with the message
-  `Configuration file hadrian/cfg/system.config is missing`, you have probably
-  forgotten to pass the `--configure` flag during the first build.
-
-* With the `--configure` (`-c`) flag, Hadrian sometimes fetches a wrong
-  Happy saying something like: `HappyTemplate-arrays-coerce: openFile: does not exist`
-  (as mentioned [here](https://github.com/haskell/cabal/issues/5867)), in
-  which case you might be better off running `./configure` manually before Hadrian.
-
 * The call to `build test` sometimes fails with
   `libCffi_p.a: copyFile: does not exist` (as noticed
   [here](https://gitlab.haskell.org/ghc/ghc/issues/15877#note_166739)).