cc -pipe -O   -pthread -I/usr/local/include  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations threads/thrd_equal.c -o threads/thrd_equal -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt -L/usr/local/lib  -lintl -lrt -lcrypt
threads/thrd_equal.c:1:10: fatal error: threads.h: No such file or directory
 #include <threads.h>
          ^~~~~~~~~~~
compilation terminated.