From 035a6e805f28bc810ad0e745d6d0e4180b6650d5 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Mon, 20 Sep 2021 20:09:54 +0100
Subject: [PATCH] libpsm2: disable blanket -Werror (gcc-11 fix)

Without the change gcc-11 build fails as:

```
$ nix-build -E 'with import ./. {}; libpsm2.override { stdenv = gcc11Stdenv; }
...
/build/source/include/linux-x86_64/sysdep.h:146:9:
  error: array subscript 'struct xchg_dummy[0]'
    is partly outside array bounds of 'psmi_lock_t[1]'
```
---
 pkgs/os-specific/linux/libpsm2/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/os-specific/linux/libpsm2/default.nix b/pkgs/os-specific/linux/libpsm2/default.nix
index 1915326b7d89..8b979d479562 100644
--- a/pkgs/os-specific/linux/libpsm2/default.nix
+++ b/pkgs/os-specific/linux/libpsm2/default.nix
@@ -13,6 +13,12 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ numactl pkg-config ];
 
+  makeFlags = [
+    # Disable blanket -Werror to avoid build failures
+    # on fresh toolchains like gcc-11.
+    "WERROR="
+  ];
+
   installFlags = [
     "DESTDIR=$(out)"
     "UDEVDIR=/etc/udev"