From 13598220a699ec9039323aa79e8145d902657b5e Mon Sep 17 00:00:00 2001
From: Vincent Haupert <mail@vincent-haupert.de>
Date: Fri, 9 Apr 2021 01:51:21 +0200
Subject: [PATCH] isl_0_20: do not guess -march=/-mtune=

See #106587
---
 pkgs/development/libraries/isl/0.20.0.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/libraries/isl/0.20.0.nix b/pkgs/development/libraries/isl/0.20.0.nix
index c35588555a7..c40b3d7be0b 100644
--- a/pkgs/development/libraries/isl/0.20.0.nix
+++ b/pkgs/development/libraries/isl/0.20.0.nix
@@ -10,6 +10,10 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ gmp ];
 
+  configureFlags = [
+    "--with-gcc-arch=generic" # don't guess -march=/mtune=
+  ];
+
   enableParallelBuilding = true;
 
   meta = {