cc -O2 -pipe -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_shm/intptr_t.c -o sys_shm/intptr_t -D_POSIX_C_SOURCE=202405L  -lm -lpthread -lrt  -lstdthreads -lcrypt
sys_shm/intptr_t.c:8:1: error: unknown type name 'intptr_t'; did you mean '__intptr_t'?
    8 | intptr_t* foo;
      | ^~~~~~~~
      | __intptr_t
/usr/include/sys/_types.h:73:19: note: '__intptr_t' declared here
   73 | typedef __int64_t       __intptr_t;
      |                         ^
1 error generated.