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/uid/Kconfig

@@ -14,7 +14,6 @@ if EXAMPLES_UID
 config EXAMPLES_UID_PROGNAME
 	string "Program name"
 	default "uid"
-	depends on BUILD_LOADABLE
 	---help---
 		This is the name of the program that will be used when the NSH ELF
 		program is installed.

examples/uid/Makefile

@@ -37,21 +37,13 @@ include $(TOPDIR)/Make.defs
 
 # UID/GID built-in application info
 
-CONFIG_EXAMPLES_UID_PRIORITY ?= SCHED_PRIORITY_DEFAULT
-CONFIG_EXAMPLES_UID_STACKSIZE ?= 2048
-
-APPNAME = uid
-
+PROGNAME  = $(CONFIG_EXAMPLES_UID_PROGNAME)
 PRIORITY  = $(CONFIG_EXAMPLES_UID_PRIORITY)
 STACKSIZE = $(CONFIG_EXAMPLES_UID_STACKSIZE)
+MODULE    = $(CONFIG_EXAMPLES_UID)
 
 # UID/GID Example
 
 MAINSRC = uid_main.c
 
-CONFIG_EXAMPLES_UID_PROGNAME ?= uid$(EXEEXT)
-PROGNAME = $(CONFIG_EXAMPLES_UID_PROGNAME)
-
-MODULE = CONFIG_EXAMPLES_UID
-
 include $(APPDIR)/Application.mk

examples/uid/uid_main.c

@@ -230,11 +230,7 @@ static void show_group_by_name(FAR const char *gname)
  * uid_main
  ****************************************************************************/
 
-#if defined(BUILD_MODULE)
 int main(int argc, FAR char *argv[])
-#else
-int uid_main(int argc, char *argv[])
-#endif
 {
   if (argc < 2)
     {