[PATCH v2 1/3] score: Add and use RTEMS_SYMBOL_NAME()

[Sebastian Huber]

Update #3799.
---
 cpukit/include/rtems/score/basedefs.h | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/cpukit/include/rtems/score/basedefs.h b/cpukit/include/rtems/score/basedefs.h
index 4589bea4aa..0a4ac8e415 100644
--- a/cpukit/include/rtems/score/basedefs.h
+++ b/cpukit/include/rtems/score/basedefs.h
@@ -321,6 +321,22 @@
 #define RTEMS_DECLARE_GLOBAL_SYMBOL( _name ) \
   extern char _name[]
 
+/**
+ * @brief Constructs a symbol name.
+ *
+ * @param _name The user defined name of the symbol.  The name must be a valid
+ *   designator.  On the name a macro expansion is performed.
+ */
+#if defined(__USER_LABEL_PREFIX__)
+  #define RTEMS_SYMBOL_NAME( _name ) \
+    RTEMS_XCONCAT( __USER_LABEL_PREFIX__, _name )
+#else
+  /* Helper to perform the macro expansion */
+  #define _RTEMS_SYMBOL_NAME( _name ) _name
+
+  #define RTEMS_SYMBOL_NAME( _name ) _RTEMS_SYMBOL_NAME( _name )
+#endif
+
 /**
  * @brief Defines a global symbol with the specified name and value.
  *
@@ -335,8 +351,8 @@
 #if defined(__GNUC__)
   #define RTEMS_DEFINE_GLOBAL_SYMBOL( _name, _value ) \
     __asm__( \
-      "\t.globl " RTEMS_XSTRING( __USER_LABEL_PREFIX__ ) #_name \
-      "\n\t.set " RTEMS_XSTRING( __USER_LABEL_PREFIX__ ) #_name \
+      "\t.globl " RTEMS_XSTRING( RTEMS_SYMBOL_NAME( _name ) ) \
+      "\n\t.set " RTEMS_XSTRING( RTEMS_SYMBOL_NAME( _name ) ) \
       ", " RTEMS_STRING( _value ) "\n" \
     )
 #else
@@ -355,8 +371,8 @@
     __asm__( \
       ".pushsection \"" _section "\"\n" \
       "\t.globl " \
-      RTEMS_XSTRING( RTEMS_XCONCAT( __USER_LABEL_PREFIX__, _name ) ) "\n" \
-      RTEMS_XSTRING( RTEMS_XCONCAT( __USER_LABEL_PREFIX__, _name ) ) ":\n" \
+      RTEMS_XSTRING( RTEMS_SYMBOL_NAME( _name ) ) "\n" \
+      RTEMS_XSTRING( RTEMS_SYMBOL_NAME( _name ) ) ":\n" \
       "\t.popsection\n" \
     )
 #else
-- 
2.16.4