libroot: Move some BeOS-only API calls behind _BEOS_R5_COMPATIBLE_.

This is defined by our build system on GCC2 only, so they will now
be excluded under all other architectures.

src/system/glue/start_dyn.c

@@ -35,10 +35,12 @@ _start(int argc, char **argv, char **environment)
 	argv_save = argv;
 	__main_thread_id = find_thread(NULL);
 
+#ifdef _BEOS_R5_COMPATIBLE_
 	// These two are called to make our glue code usable under BeOS R5
 	// - in Haiku, they are both empty.
 	_init_c_library_(argc, argv, environment);
 	_call_init_routines_();
+#endif
 
 	returnCode = main(argc, argv, environment);
 

src/system/libroot/libroot_init.c

@@ -82,6 +82,13 @@ initialize_before(image_id imageID)
 }
 
 
+void
+terminate_after(image_id id)
+{
+	__heap_terminate_after();
+}
+
+#ifdef _BEOS_R5_COMPATIBLE_
 void _init_c_library_(void);
 void
 _init_c_library_(void)
@@ -91,10 +98,4 @@ _init_c_library_(void)
 	// Our libroot functions are already initialized above, so we don't have to
 	// do anything here.
 }
-
-
-void
-terminate_after(image_id id)
-{
-	__heap_terminate_after();
-}
+#endif

src/system/libroot/os/image.cpp

@@ -489,6 +489,7 @@ __flatten_process_args(const char* const* args, int32 argCount,
 }
 
 
+#ifdef _BEOS_R5_COMPATIBLE_
 extern "C" void _call_init_routines_(void);
 void
 _call_init_routines_(void)
@@ -496,4 +497,4 @@ _call_init_routines_(void)
 	// This is called by the original BeOS startup code.
 	// We don't need it, because our loader already does the job, right?
 }
-
+#endif