https://gitlab.gnome.org/GNOME/json-glib/-/commit/a5eb23ca06a6ec345fba376296bd4236b7fb7635

From a5eb23ca06a6ec345fba376296bd4236b7fb7635 Mon Sep 17 00:00:00 2001
From: Emmanuele Bassi <ebassi@gnome.org>
Date: Sun, 26 Nov 2023 17:20:29 +0000
Subject: [PATCH] build: Gate GIR fatal warnings to werror

This way we consistently fail early.
---
 json-glib/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/json-glib/meson.build b/json-glib/meson.build
index e13e688..9e51931 100644
--- a/json-glib/meson.build
+++ b/json-glib/meson.build
@@ -113,7 +113,7 @@ if gir.found()
     header: 'json-glib/json-glib.h',
     install: true,
     extra_args: gir_args,
-    fatal_warnings: true,
+    fatal_warnings: get_option('werror'),
   )
 else
   json_glib_gir = []
-- 
GitLab