fix(logging): Add wrapper when using wifi without esp_diagnostics

CMakeLists.txt

@@ -37,6 +37,7 @@ set(CORE_SRCS
   cores/esp32/esp32-hal-i2c-ng.c
   cores/esp32/esp32-hal-i2c-slave.c
   cores/esp32/esp32-hal-ledc.c
+  cores/esp32/esp32-hal-log-wrapper.c
   cores/esp32/esp32-hal-matrix.c
   cores/esp32/esp32-hal-misc.c
   cores/esp32/esp32-hal-periman.c
@@ -426,6 +427,13 @@ if(CONFIG_AUTOSTART_ARDUINO)
     target_link_libraries(${COMPONENT_LIB} INTERFACE "-u _Z5setupv -u _Z4loopv")
 endif()
 
+# Add linker wrap flags for esp_log functions when CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP is not enabled
+# This provides wrapper functions required by WiFi library even when esp_diagnostics is not active
+if(NOT CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP)
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--wrap=esp_log_write")
+    target_link_libraries(${COMPONENT_LIB} INTERFACE "-Wl,--wrap=esp_log_writev")
+endif()
+
 # This function adds a dependency on the given component if the component is included into the build.
 function(maybe_add_component component_name)
     idf_build_get_property(components BUILD_COMPONENTS)

cores/esp32/esp32-hal-log-wrapper.c

@@ -0,0 +1,42 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "sdkconfig.h"
+
+/*
+ * This file provides wrapper implementations for esp_log_write and esp_log_writev
+ * when CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP is not enabled.
+ *
+ * When CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP is enabled, the esp_diagnostics component
+ * provides these wrappers. However, when it's disabled, WiFi libraries still expect
+ * these wrapper functions to exist, causing linker errors.
+ *
+ * This implementation provides simple pass-through wrappers that call the real
+ * ESP-IDF logging functions, ensuring compatibility without requiring esp_diagnostics.
+ */
+
+#ifndef CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP
+
+#include <stdarg.h>
+#include "esp_log.h"
+
+// Declare the real functions that will be wrapped by the linker
+void __real_esp_log_write(esp_log_level_t level, const char *tag, const char *format, ...);
+void __real_esp_log_writev(esp_log_level_t level, const char *tag, const char *format, va_list args);
+
+// Wrapper implementations that simply call through to the real functions
+void __wrap_esp_log_write(esp_log_level_t level, const char *tag, const char *format, ...) {
+  va_list args;
+  va_start(args, format);
+  __real_esp_log_writev(level, tag, format, args);
+  va_end(args);
+}
+
+void __wrap_esp_log_writev(esp_log_level_t level, const char *tag, const char *format, va_list args) {
+  __real_esp_log_writev(level, tag, format, args);
+}
+
+#endif  // !CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP

idf_component_examples/hello_world/sdkconfig.defaults

@@ -10,8 +10,3 @@ CONFIG_AUTOSTART_ARDUINO=y
 CONFIG_FREERTOS_HZ=1000
 # end of FREERTOS
 # end of Component config
-
-#
-# DIAGNOSTICS
-#
-CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP=y

idf_component_examples/hw_cdc_hello_world/sdkconfig.defaults

@@ -10,8 +10,3 @@ CONFIG_AUTOSTART_ARDUINO=y
 CONFIG_FREERTOS_HZ=1000
 # end of FREERTOS
 # end of Component config
-
-#
-# DIAGNOSTICS
-#
-CONFIG_DIAG_USE_EXTERNAL_LOG_WRAP=y