diff -r 6d65d5acee06 -r 96f7513ad2d7 symbianosbld/cedarutils/inc/Symbian_OS_future.hrh
--- a/symbianosbld/cedarutils/inc/Symbian_OS_future.hrh	Tue Feb 02 01:12:20 2010 +0200
+++ b/symbianosbld/cedarutils/inc/Symbian_OS_future.hrh	Fri Apr 16 16:15:22 2010 +0300
@@ -2087,7 +2087,7 @@
 This #define supports PREQ2740 and other splitting "mixed" header file PREQs. 
 */
 
-//#define SYMBIAN_ENABLE_SPLIT_HEADERS
+#define SYMBIAN_ENABLE_SPLIT_HEADERS
 
 
 /**
@@ -2142,3 +2142,14 @@
 
 #define SYMBIAN_UNIVERSAL_INSTALL_FRAMEWORK
 
+/**
+	@publishedPartner
+	@released
+
+	SYMBIAN_E32_ATOMIC_API
+
+	If SYMBIAN_E32_ATOMIC_API is defined the header file e32atomics.h is available
+	and should be used in preference to hand-coding ARM atomic instructions.
+*/
+#define SYMBIAN_E32_ATOMIC_API
+