From 270867ac8bfe353421870495f8fdd8651d0520cb Mon Sep 17 00:00:00 2001
From: Sebastian Graf <sebastian.graf@kit.edu>
Date: Fri, 27 Oct 2023 18:54:19 +0200
Subject: [PATCH] ghc-toolchain: build with `-package-env=-` (#24131)
Otherwise globally installed libraries (via `cabal install --lib`)
break the build.
Fixes #24131.
---
m4/ghc_toolchain.m4 | 1 +
1 file changed, 1 insertion(+)
diff --git a/m4/ghc_toolchain.m4 b/m4/ghc_toolchain.m4
index 128b285aeeea..6f3fa1c70343 100644
--- a/m4/ghc_toolchain.m4
+++ b/m4/ghc_toolchain.m4
@@ -148,6 +148,7 @@ AC_DEFUN([FIND_GHC_TOOLCHAIN_BIN],[
-ilibraries/ghc-platform/src -iutils/ghc-toolchain/src \
-XNoImplicitPrelude \
-odir actmp-ghc-toolchain -hidir actmp-ghc-toolchain \
+ -package-env=- \
utils/ghc-toolchain/exe/Main.hs -o acghc-toolchain || AC_MSG_ERROR([Could not compile ghc-toolchain])
GHC_TOOLCHAIN_BIN="./acghc-toolchain"
;;
--
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