From 964c4385871d6fbf6728410a83cd7b360c0b1f65 Mon Sep 17 00:00:00 2001
From: Sudeep Mohanty <sudeep.mohanty@espressif.com>
Date: Wed, 22 Apr 2026 14:47:54 +0200
Subject: [PATCH] fix(esp_hal_sd): include <stddef.h> for offsetof in
 sdio_slave_hal.c

picolibc with C23 no longer exposes <stddef.h> implicitly through
other headers; add the explicit include for `offsetof`.
---
 components/esp_hal_sd/sdio_slave_hal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/components/esp_hal_sd/sdio_slave_hal.c b/components/esp_hal_sd/sdio_slave_hal.c
index 25829f397e1..dd36936bd71 100644
--- a/components/esp_hal_sd/sdio_slave_hal.c
+++ b/components/esp_hal_sd/sdio_slave_hal.c
@@ -7,6 +7,7 @@
 // The HAL layer for SDIO slave (common part)
 
 #include <string.h>
+#include <stddef.h>
 #include <inttypes.h>
 #include "soc/sdio_slc_struct.h"
 #include "soc/sdio_hinf_struct.h"