Mac M2 Monterey proc_pid_rusage 问题

**Describe the bug (描述bug)**

下载apache-brpc-1.5.0-src.tar.gz  编译运行，运行时抛出报警

W0522 13:33:41   259 src/bvar/default_variables.cpp:452] Fail to proc_pid_rusage: Invalid argument

**To Reproduce (复现方法)**


**Expected behavior (期望行为)**


**Versions (各种版本)**
OS:  Mac M2 Monterey 
Compiler:
brpc:  1.5.0
protobuf: libprotoc 3.21.12

**Additional context/screenshots (更多上下文/截图)**

