Application.mk and main.c files: Change builtin's entry point from main to xxx_main by macro expansion. This change make the entry point fully compliant with POSIX/ANSI standard.

examples/null/Makefile

@@ -37,17 +37,13 @@ include $(TOPDIR)/Make.defs
 
 # The NULL example built-in application info
 
-APPNAME = null
+PROGNAME = null
 PRIORITY = SCHED_PRIORITY_DEFAULT
 STACKSIZE = 2048
+MODULE = $(CONFIG_EXAMPLES_NULL)
 
 # The smallest thing you can build -- the NULL example.
 
 MAINSRC = null_main.c
 
-CONFIG_XYZ_PROGNAME ?= null$(EXEEXT)
-PROGNAME = $(CONFIG_XYZ_PROGNAME)
-
-MODULE = CONFIG_EXAMPLES_NULL
-
 include $(APPDIR)/Application.mk

examples/null/null_main.c

@@ -63,11 +63,7 @@
  * Name: null_main
  ****************************************************************************/
 
-#ifdef BUILD_MODULE
 int main(int argc, char *argv[])
-#else
-int null_main(int argc, char *argv[])
-#endif
 {
   return 0;
 }