x86_64-managarm-gcc -pthread  -Wall -Wextra posix_close.c -o posix_close -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE -lm -lpthread -lrt -lintl -liconv
posix_close.c: In function ‘main’:
posix_close.c:9:14: error: implicit declaration of function ‘posix_close’ [-Wimplicit-function-declaration]
    9 |         if ( posix_close(0, POSIX_CLOSE_RESTART) < 0 )
      |              ^~~~~~~~~~~
posix_close.c:9:29: error: ‘POSIX_CLOSE_RESTART’ undeclared (first use in this function)
    9 |         if ( posix_close(0, POSIX_CLOSE_RESTART) < 0 )
      |                             ^~~~~~~~~~~~~~~~~~~
posix_close.c:9:29: note: each undeclared identifier is reported only once for each function it appears in