x86_64-managarm-gcc -pthread  -Wall -Wextra -Werror -Wno-error=deprecated -Wno-error=deprecated-declarations sys_sem/pid_t.c -o sys_sem/pid_t -D_POSIX_C_SOURCE=202405L -lm -lpthread -lrt -lintl -liconv
sys_sem/pid_t.c:8:1: error: unknown type name ‘pid_t’; did you mean ‘gid_t’?
    8 | pid_t* foo;
      | ^~~~~
      | gid_t