mbed official / mbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Dependents:   hello SerialTestv11 SerialTestv12 Sierpinski ... more

mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

Diff: platform/mbed_toolchain.h

Revision:
154:fb8e0ae1cceb
Parent:
148:fd96258d940d
--- a/platform/mbed_toolchain.h	Wed Oct 11 12:36:33 2017 +0100
+++ b/platform/mbed_toolchain.h	Wed Oct 25 14:40:21 2017 +0100
@@ -92,6 +92,26 @@
 #endif
 #endif
 
+/** MBED_USED
+ *  Inform the compiler that a static variable is to be retained in the object file, even if it is unreferenced.
+ *
+ *  @code
+ *  #include "mbed_toolchain.h"
+ *
+ *  MBED_USED int foo;
+ *
+ *  @endcode
+ */
+#ifndef MBED_USED
+#if defined(__GNUC__) || defined(__clang__) || defined(__CC_ARM)
+#define MBED_USED __attribute__((used))
+#elif defined(__ICCARM__)
+#define MBED_USED __root
+#else
+#define MBED_USED
+#endif
+#endif
+
 /** MBED_WEAK
  *  Mark a function as being weak.
  *