From b5f24fb473560cc533143846329666896e9861be Mon Sep 17 00:00:00 2001
From: Takenobu Tani <takenobu.hs@gmail.com>
Date: Sun, 22 Sep 2019 12:13:28 +0900
Subject: Hadrian: Add -haddock option for GHCi's :doc command

This commit adds -haddock option to Hadrian-based build system.

To enable :doc command on GHCi, core libraries must be compiled
with -haddock option.
Especially, the `-haddock` option is essential for a release build.

Assuming current GitLab CI condition (.gitlab-ci.yml),
I add -haddock option to the default flavour only.

This has already been done for Make-based build system.
Please see #16415.
---
 hadrian/doc/flavours.md         | 2 +-
 hadrian/src/Settings/Default.hs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/hadrian/doc/flavours.md b/hadrian/doc/flavours.md
index 45479f8f68..689c3f1742 100644
--- a/hadrian/doc/flavours.md
+++ b/hadrian/doc/flavours.md
@@ -38,7 +38,7 @@ when compiling the `compiler` library, and `hsGhc` when compiling/linking the GH
     <td>-O<br>-H64m<br></td>
     <td>-O2<br>-H64m</td>
     <td></td>
-    <td></td>
+    <td>-haddock</td>
     <td></td>
     <td></td>
     <td></td>
diff --git a/hadrian/src/Settings/Default.hs b/hadrian/src/Settings/Default.hs
index 83a3a9905e..05e98555ea 100644
--- a/hadrian/src/Settings/Default.hs
+++ b/hadrian/src/Settings/Default.hs
@@ -195,7 +195,7 @@ defaultSourceArgs = SourceArgs
     { hsDefault  = mconcat [ stage0    ? arg "-O"
                            , notStage0 ? arg "-O2"
                            , arg "-H32m" ]
-    , hsLibrary  = mempty
+    , hsLibrary  = notStage0 ? arg "-haddock"
     , hsCompiler = mempty
     , hsGhc      = mempty }
 
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