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/embedlog/Kconfig

@@ -6,7 +6,7 @@
 if SYSTEM_EMBEDLOG
 
 config EXAMPLES_EMBEDLOG
-	bool "embedlog example"
+	tristate "embedlog example"
 	default n
 	select EMBEDLOG_ENABLE_OUT_FILE
 	select EMBEDLOG_ENABLE_OUT_STDERR
@@ -26,7 +26,6 @@ if EXAMPLES_EMBEDLOG
 config EXAMPLES_EMBEDLOG_PROGNAME
 	string "Program name"
 	default "embedlog"
-	depends on BUILD_KERNEL
 	---help---
 		This is the name of the program that will be used when the NSH ELF
 		program is installed.

examples/embedlog/Makefile

@@ -37,19 +37,14 @@ include $(TOPDIR)/Make.defs
 
 # embedlog example built-in application info
 
-CONFIG_EXAMPLES_EMBEDLOG_PRIORITY ?= SCHED_PRIORITY_DEFAULT
-CONFIG_EXAMPLES_EMBEDLOG_STACKSIZE ?= 2048
-
-APPNAME = $(CONFIG_EXAMPLES_EMBEDLOG_PROGNAME)
+PROGNAME = $(CONFIG_EXAMPLES_EMBEDLOG_PROGNAME)
 PRIORITY = $(CONFIG_EXAMPLES_EMBEDLOG_PRIORITY)
 STACKSIZE = $(CONFIG_EXAMPLES_EMBEDLOG_STACKSIZE)
+MODULE = $(CONFIG_EXAMPLES_EMBEDLOG)
 
 # embedlog Example
 
 MAINSRC = embedlog_main.c
 CFLAGS += -I$(APPDIR)/include/system
 
-CONFIG_EXAMPLES_EMBEDLOG_PROGNAME ?= embedlog$(EXEEXT)
-PROGNAME = $(CONFIG_EXAMPLES_EMBEDLOG_PROGNAME)
-
 include $(APPDIR)/Application.mk

examples/embedlog/embedlog_main.c

@@ -317,11 +317,7 @@ static void el_print_file(const char *workdir)
  * embedlog_main
  ****************************************************************************/
 
-#ifdef CONFIG_BUILD_KERNEL
 int main(int argc, FAR char *argv[])
-#else
-int embedlog_main(int argc, FAR char *argv[])
-#endif
 {
   if (argc > 2 || (argc == 2 && strcmp(argv[1], "-h") == 0))
     {