virglrenderer: Fix build with glibc 2.43+

(From OE-Core rev: 73be494b2586d8b73cc14dddebfc1753df233530)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
(cherry picked from commit 8e85dc6b7f5f7668a610b5fd3754c716f0af65b0)
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

meta/recipes-graphics/virglrenderer/virglrenderer/0001-c11-use-glibc-s-once_flag-ONCE_FLAG_INIT-when-presen.patch

@@ -0,0 +1,55 @@
+From 179e744f7577d98df7c79d7324c22acfb32a0154 Mon Sep 17 00:00:00 2001
+From: Dave Airlie <airlied@redhat.com>
+Date: Fri, 7 Nov 2025 13:14:56 +1000
+Subject: [PATCH] c11/threads: fix build on c23
+
+C23/glibc is now including once_init in stdlib.h
+
+https://patchwork.sourceware.org/project/glibc/patch/78061085-f04a-0c45-107b-5a8a15521083@redhat.com/#213088
+
+Just fix up our use of it.
+
+Upstream-Status: Submitted [https://gitlab.freedesktop.org/virgl/virglrenderer/-/merge_requests/1567]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ src/mesa/compat/c11/impl/threads_posix.c | 3 ++-
+ 2 files changed, 4 insertions(+), 1 deletion(-)
+
+--- a/src/mesa/compat/c11/threads_posix.h
++++ b/src/mesa/compat/c11/threads_posix.h
+@@ -51,7 +51,9 @@ Configuration macro:
+ #include <pthread.h>
+
+ /*---------------------------- macros ----------------------------*/
++#ifndef __once_flag_defined
+ #define ONCE_FLAG_INIT PTHREAD_ONCE_INIT
++#endif
+ #ifdef INIT_ONCE_STATIC_INIT
+ #define TSS_DTOR_ITERATIONS PTHREAD_DESTRUCTOR_ITERATIONS
+ #else
+@@ -66,8 +68,9 @@ typedef pthread_cond_t  cnd_t;
+ typedef pthread_t       thrd_t;
+ typedef pthread_key_t   tss_t;
+ typedef pthread_mutex_t mtx_t;
++#ifndef __once_flag_defined
+ typedef pthread_once_t  once_flag;
+-
++#endif
+
+ /*
+ Implementation limits:
+@@ -90,12 +93,13 @@ impl_thrd_routine(void *p)
+
+ /*--------------- 7.25.2 Initialization functions ---------------*/
+ // 7.25.2.1
++#ifndef __once_flag_defined
+ static inline void
+ call_once(once_flag *flag, void (*func)(void))
+ {
+     pthread_once(flag, func);
+ }
+-
++#endif
+
+ /*------------- 7.25.3 Condition variable functions -------------*/
+ // 7.25.3.1

meta/recipes-graphics/virglrenderer/virglrenderer_1.0.1.bb

@@ -13,6 +13,7 @@ SRCREV = "690680e5f0f952e22424fca1538c1b24457a0868"
 SRC_URI = "git://gitlab.freedesktop.org/virgl/virglrenderer.git;branch=main;protocol=https \
            file://0001-meson.build-use-python3-directly-for-python.patch \
            file://0001-vrend-Fix-int-conversion-fatal-build-error-with-GCC-.patch \
+           file://0001-c11-use-glibc-s-once_flag-ONCE_FLAG_INIT-when-presen.patch \
            "
 
 S = "${WORKDIR}/git"