From 5b50a6b4084edbb5802460c83ec8a6085e9df331 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 29 Oct 2025 09:48:08 +0100
Subject: cargo: add check-cfg for system_deps_have_* symbols

---
 mesonbuild/cargo/interpreter.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mesonbuild/cargo/interpreter.py b/mesonbuild/cargo/interpreter.py
index a40b5ec65..297ff5e87 100644
--- a/mesonbuild/cargo/interpreter.py
+++ b/mesonbuild/cargo/interpreter.py
@@ -147,6 +147,9 @@ class PackageState:
                 if feature != 'default':
                     args.append('--check-cfg')
                     args.append(f'cfg(feature,values("{feature}"))')
+            for name in self.manifest.system_dependencies:
+                args.append('--check-cfg')
+                args.append(f'cfg(system_deps_have_{fixup_meson_varname(name)})')
 
         return args
 
-- 
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