export more symbols of PThread.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2433 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/drivers/include/drivers/spi.h

@@ -9,13 +9,19 @@
  *
  * Change Logs:
  * Date           Author       Notes
+ * 2012-11-23     Bernard      Add extern "C"
  */
 
 #ifndef __SPI_H__
 #define __SPI_H__
 
+#include <stdlib.h>
 #include <rtthread.h>
 
+#ifdef __cplusplus
+extern "C"{
+#endif
+
 #define RT_SPI_CPHA     (1<<0)                             /* bit[0]:CPHA, clock phase */
 #define RT_SPI_CPOL     (1<<1)                             /* bit[1]:CPOL, clock polarity */
 /**
@@ -247,4 +253,8 @@ rt_inline void rt_spi_message_append(struct rt_spi_message *list,
     message->next = RT_NULL;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/drivers/serial/serial.c

@@ -12,6 +12,7 @@
  * 2006-03-13     bernard      first version
  * 2012-05-15     lgnq         modified according bernard's implementation.
  * 2012-05-28     bernard      code cleanup
+ * 2012-11-23     bernard      fix compiler warning.
  */
 
 #include <rthw.h>
@@ -427,7 +428,7 @@ void rt_hw_serial_isr(struct rt_serial_device *serial)
  */
 void rt_hw_serial_dma_tx_isr(struct rt_serial_device *serial)
 {
-    void *data_ptr;
+    const void *data_ptr;
     rt_size_t data_size;
 
     if (RT_EOK == rt_data_queue_pop(&(serial->tx_dq), &data_ptr, &data_size, 0))