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common/debug_lib_check.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Add a specially formatted string to each debug library of the form 
+//          "%LIBNAME%.lib is built debug!". We can search for this string via
+//			a Perforce trigger to ensure that debug LIBs are not checked in.
+//
+//			Also added a global int that is emitted only in release builds so
+//			that release DLLs and EXEs can ensure that they are linking to 
+//			release versions of LIBs at link time. The global int adhere to the
+//			naming convention "%LIBNAME%_lib_is_a_release_build".
+//
+//			To take advantage of this pattern a DLL or EXE should add code 
+//			at global scope similar to the following in one of its modules:
+//
+//			#if !defined(_DEBUG)
+//			extern int bitmap_lib_is_a_release_build;
+//
+//			void DebugTestFunction()
+//			{
+//				bitmap_lib_is_a_release_build = 0;
+//			}
+//			#endif
+//
+//=============================================================================//
+
+#if defined(DEBUG) || defined(_DEBUG)
+#define _DEBUGONLYSTRING(x) #x
+#define DEBUGONLYSTRING(x) _DEBUGONLYSTRING(x) 
+static volatile char const *pDebugString = DEBUGONLYSTRING(LIBNAME) ".lib is built debug!";
+#else
+#define _RELONLYINT(x) int x ## _lib_is_a_release_build = 0 
+#define RELONLYINT(x) _RELONLYINT(x)
+RELONLYINT(LIBNAME);
+#endif