cc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations unistd/pause.c -o unistd/pause -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
unistd/pause.c:5:20: error: ‘pause’ undeclared here (not in a function)
    5 | int (*foo)(void) = pause;
      |                    ^~~~~