cc -O2 -pipe  -pthread -I/usr/local/include  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_types/pthread_t.c -o sys_types/pthread_t -D_POSIX_C_SOURCE=202405L  -lm -lpthread -L/usr/local/lib  -lintl
sys_types/pthread_t.c:2:1: error: unknown type name 'pthread_t'
    2 | pthread_t* foo;
      | ^
1 error generated.