[scarthgap][PATCH 1/2] mesa: fix build on host with glibc-2.43

[martin.jansa@gmail.com]

From: Martin Jansa <martin.jansa@gmail.com>

Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
---
 .../0001-c11-threads-fix-build-on-c23.patch   | 56 +++++++++++++++++++
 meta/recipes-graphics/mesa/mesa.inc           |  1 +
 2 files changed, 57 insertions(+)
 create mode 100644 meta/recipes-graphics/mesa/files/0001-c11-threads-fix-build-on-c23.patch

diff --git a/meta/recipes-graphics/mesa/files/0001-c11-threads-fix-build-on-c23.patch b/meta/recipes-graphics/mesa/files/0001-c11-threads-fix-build-on-c23.patch
new file mode 100644
index 0000000000..f4de5e61a9
--- /dev/null
+++ b/meta/recipes-graphics/mesa/files/0001-c11-threads-fix-build-on-c23.patch
@@ -0,0 +1,56 @@
+From 3f007af78283aea2e8c1a3addff7aeae862d8b28 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.
+
+Cc: mesa-stable
+Reviewed-by: Yonggang Luo <luoyonggang@gmail.com>
+Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38298>
+
+Upstream-Status: Backport [v26.0.0 179e744f7577d98df7c79d7324c22acfb32a0154]
+Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
+---
+ src/c11/impl/threads_posix.c | 3 ++-
+ src/c11/threads.h            | 2 ++
+ 2 files changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/src/c11/impl/threads_posix.c b/src/c11/impl/threads_posix.c
+index 2540e3e0c49..f75774fc51d 100644
+--- a/src/c11/impl/threads_posix.c
++++ b/src/c11/impl/threads_posix.c
+@@ -70,12 +70,13 @@ impl_thrd_routine(void *p)
+ 
+ /*--------------- 7.25.2 Initialization functions ---------------*/
+ // 7.25.2.1
++#ifndef __once_flag_defined
+ void
+ call_once(once_flag *flag, void (*func)(void))
+ {
+     pthread_once(flag, func);
+ }
+-
++#endif
+ 
+ /*------------- 7.25.3 Condition variable functions -------------*/
+ // 7.25.3.1
+diff --git a/src/c11/threads.h b/src/c11/threads.h
+index dbcb3459a9b..c849f385e30 100644
+--- a/src/c11/threads.h
++++ b/src/c11/threads.h
+@@ -118,8 +118,10 @@ 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;
+ #  define ONCE_FLAG_INIT PTHREAD_ONCE_INIT
++#endif
+ #  ifdef PTHREAD_DESTRUCTOR_ITERATIONS
+ #    define TSS_DTOR_ITERATIONS PTHREAD_DESTRUCTOR_ITERATIONS
+ #  else
diff --git a/meta/recipes-graphics/mesa/mesa.inc b/meta/recipes-graphics/mesa/mesa.inc
index 9157fe9c3f..eb23a3f82c 100644
--- a/meta/recipes-graphics/mesa/mesa.inc
+++ b/meta/recipes-graphics/mesa/mesa.inc
@@ -19,6 +19,7 @@ SRC_URI = "https://mesa.freedesktop.org/archive/mesa-${PV}.tar.xz \
            file://0001-drisw-fix-build-without-dri3.patch \
            file://0002-glxext-don-t-try-zink-if-not-enabled-in-mesa.patch \
            file://0001-Revert-meson-do-not-pull-in-clc-for-clover.patch \
+           file://0001-c11-threads-fix-build-on-c23.patch \
 "
 
 SRC_URI[sha256sum] = "7454425f1ed4a6f1b5b107e1672b30c88b22ea0efea000ae2c7d96db93f6c26a"