From 1ce28e5a248b15e278e8585c154c38c31574ca83 Mon Sep 17 00:00:00 2001
From: Luca Boccassi <bluca@debian.org>
Date: Thu, 4 Apr 2024 23:42:45 +0100
Subject: [PATCH] meson: set -fno-ssa-phiopt when building bpf with gcc

There are bugs in the kernel verifier that cause legitimate code
to be rejected, disabling this optimization makes bpf programs
built with a new enough gcc work again.

Fixes https://github.com/systemd/systemd/issues/31888
---
 meson.build | 1 +
 1 file changed, 1 insertion(+)

diff --git a/meson.build b/meson.build
index f4b382c6023..1c4cac82c11 100644
--- a/meson.build
+++ b/meson.build
@@ -1701,6 +1701,7 @@ if conf.get('BPF_FRAMEWORK') == 1
         bpf_gcc_flags = [
                 '-std=gnu11',
                 '-fno-stack-protector',
+                '-fno-ssa-phiopt',
                 '-O2',
                 '-mcpu=v3',
                 '-mco-re',