From 48f5334593a84e81f79315cf2dd474333de888d0 Mon Sep 17 00:00:00 2001
From: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>
Date: Thu, 23 Oct 2025 17:59:13 -0400
Subject: [PATCH] wasilibc: disable libcxxhardeningfast and
 libcxxhardeningextensive

Otherwise libcxx build fails because predefined-macros.txt contains
unexpected `_LIBCPP_HARDENING_MODE`.

Fixes #454709
---
 pkgs/by-name/wa/wasilibc/package.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/by-name/wa/wasilibc/package.nix b/pkgs/by-name/wa/wasilibc/package.nix
index c5c5204454f7..219d639aadd7 100644
--- a/pkgs/by-name/wa/wasilibc/package.nix
+++ b/pkgs/by-name/wa/wasilibc/package.nix
@@ -19,6 +19,12 @@ stdenvNoLibc.mkDerivation (finalAttrs: {
     fetchSubmodules = true;
   };
 
+  # These flags break pkgsCross.wasi32.llvmPackages.libcxx
+  hardeningDisable = [
+    "libcxxhardeningfast"
+    "libcxxhardeningextensive"
+  ];
+
   outputs = [
     "out"
     "dev"