From 60b02896e406c36591520eac2018ea1ba0c770ce Mon Sep 17 00:00:00 2001
From: ARATA Mizuki <minorinoki@gmail.com>
Date: Mon, 1 Nov 2021 13:27:39 +0900
Subject: hadrian: Use $bindir instead of `dirname $0` in ghci wrapper

`dirname $0` doesn't work when the wrapper is called via a symbolic link.

Fix #20589

(cherry picked from commit 9f42a6dcebf12a8c3e7c18d8291c0fa95e3c4d86)
---
 hadrian/src/Rules/BinaryDist.hs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/hadrian/src/Rules/BinaryDist.hs b/hadrian/src/Rules/BinaryDist.hs
index dc86af3c4f..c86d42d8f0 100644
--- a/hadrian/src/Rules/BinaryDist.hs
+++ b/hadrian/src/Rules/BinaryDist.hs
@@ -420,8 +420,7 @@ runGhcWrapper = pure $ "exec \"$executablename\" -f \"$exedir/ghc\" ${1+\"$@\"}\
 -- | --interactive flag.
 ghciScriptWrapper :: Action String
 ghciScriptWrapper = pure $ unlines
-    [ "DIR=`dirname \"$0\"`"
-    , "executable=\"$DIR/ghc\""
+    [ "executable=\"$bindir/ghc\""
     , "exec $executable --interactive \"$@\"" ]
 
 -- | When not on Windows, we want to ship the 3 flavours of the iserv program
-- 
cgit v1.2.1