x86_64-managarm-gcc -pthread  -Wall -Wextra _Fork.c -o _Fork -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
_Fork.c: In function ‘main’:
_Fork.c:9:21: error: implicit declaration of function ‘_Fork’ [-Wimplicit-function-declaration]
    9 |         pid_t pid = _Fork();
      |                     ^~~~~