https://bugs.gentoo.org/915544
https://github.com/randombit/botan/commit/a1a32558669a6751e39420b26930d477790509ce

From a1a32558669a6751e39420b26930d477790509ce Mon Sep 17 00:00:00 2001
From: Jack Lloyd <jack@randombit.net>
Date: Wed, 11 Oct 2023 07:36:31 -0400
Subject: [PATCH] Fix Ninja build to pass instruction set flags to the compiler

Fixes #3750
--- a/src/build-data/ninja.in
+++ b/src/build-data/ninja.in
@@ -161,6 +161,7 @@ build tidy: tidy
 
 %{for lib_build_info}
 build %{obj}: compile_lib %{src}
+  isa_flags = %{isa_flags}
 %{endfor}
 
 %{for cli_build_info}