Using write() for output for better portability

bsp_linux/main.c

@@ -2,10 +2,12 @@
 #include <stdint.h>
 #include <stdlib.h>
 
+#include <unistd.h>
+
 void mission(void);
 
 void done() {
-  printf("done.");
+  printf("done.\n");
   exit(0);
 }
 
@@ -15,11 +17,10 @@ void rust_eh_personality() {
     puts("eh_personality");
 }
 
-void outbyte(uint8_t byte){
-    printf("%c", byte);
-}
-
 int main(void) {
+    printf("std %i sterr %i\n", stdout, stderr);
+    const char * buffer ="123";
+    write(STDOUT_FILENO, buffer, 3);
     mission();
     return 0;
 }