undefined reference to `getentropy'

[itlabers]

Notice

Describe the bug

1. run "cmake build" in vscode
   2 report error " Utilities.cc:1192 undefined reference to `getentropy'"

Screenshots

Desktop (please complete the following information): environment: os : centos 7.0 glibc : 2.29 drogon :1.7.5

I think it's the lack of references in the glibc version like this

#include <unistd.h>

[an-tao]

@itlabers Thanks for your feedback, but I can't reproduce this issue in my enverionment. Could you try to fix this yourself and make a PR for it?

[itlabers]

ldd --version glibc version:2.29

ll /lib64/libc.so.6 glibc version:2.17

The actual version is 2.17 ,The method getentropy is missing