apps: hello: simplify hello world example

'hello world' is an example for showing minimum binary footprint. As
sleep() goes with signaling and scheduling functions which are a little
bit heavy, using it in this example increases the footprint and is
inappropriate.

Change-Id: I4140bd6393f89762182fc1f883fad86b112de154
Signed-off-by: EunBong Song <eunb.song@samsung.com>

diff --git a/apps/examples/hello/hello_main.c b/apps/examples/hello/hello_main.c
index 7108714..ada58ad 100644 (file)
--- a/apps/examples/hello/hello_main.c
+++ b/apps/examples/hello/hello_main.c
@@ -56,27 +56,17 @@
 
 #include <tinyara/config.h>
 #include <stdio.h>
-#include <unistd.h>
 
 /****************************************************************************
  * hello_main
  ****************************************************************************/
 
-#define PRINT_INTERVAL_SECS 20
-
 #ifdef CONFIG_BUILD_KERNEL
 int main(int argc, FAR char *argv[])
 #else
 int hello_main(int argc, char *argv[])
 #endif
 {
-       int i;
-
-       printf("This Hello World msg will be printed third every 20 seconds\n");
-       for (i = 0; i < 3; i++) {
-               printf("Hello, World!!\n");
-               sleep(PRINT_INTERVAL_SECS);
-       }
-
+       printf("Hello, World!!\n");
        return 0;
 }