【解决】undefined reference to 'apr_thread_rwlock_destory'、undefined reference to 'apr_initialize'undefined_reference_apr1、首选确认安装了apr及apr-util否则报错<apr-1 apr_xxx h>头文件找不到。2、-lapr-1 -laprutil-1添加库链接，否则报错：undefined reference to & 39...

【解决】Missing FindPython3.cmakeMissing-FindPython3-cmake编译llvm时，报错：CMake Error at CMakeLists txt:729 (find_package): By not providing "FindPython3 cmake" in CMAKE_MODULE_PATH this project has asked 编译llvm时，报错： CMake Error at CMakeLists.txt:729 (find_package):...

【解决】This is allowed only when policy CMP0079 is set to NEW.This-is-allowed-only-when-policy-CMP0079-is-set-to-NEWcmake最低版本设置为3 13以上，可解决。cmake_minimum_required(VERSION 3 13) can fix the first problem 参考：https: gitlab kitware com cmake cmake - issues 19693cma...

memcpy() 是非线程安全的，并发时需加锁或使用原子操作memcpy_thread_unsafe最近调查线上一个问题，就是一块 int32 的内存会极低概率出现 -18亿的巨数字，有时又是正确的。自己刻意测试又不能再现，在确认不可能将这样一个巨量数...

C++ SpinLock 自旋锁的代码实现（全网最简略的方式）cpp_spinlock1、最简单的一种，来自《C++并发编程实战》第5章 C++内存模型和原子类型操作： include <iostream> include <atomic> include <thread> include <vector> include <unistd h 1、最简单的一种，...

【解决】Missing FindPython3.cmakeMissing-FindPython3-cmake编译llvm时，报错：CMake Error at CMakeLists txt:729 (find_package): By not providing "FindPython3 cmake" in CMAKE_MODULE_PATH this project has asked 编译llvm时，报错： CMake Error at CMakeLists.txt:729 (find_package):...

【解决】This is allowed only when policy CMP0079 is set to NEW.This-is-allowed-only-when-policy-CMP0079-is-set-to-NEWcmake最低版本设置为3 13以上，可解决。cmake_minimum_required(VERSION 3 13) can fix the first problem 参考：https: gitlab kitware com cmake cmake - issues 19693cma...

【解决】Missing FindPython3.cmakeMissing-FindPython3-cmake编译llvm时，报错：CMake Error at CMakeLists txt:729 (find_package): By not providing "FindPython3 cmake" in CMAKE_MODULE_PATH this project has asked 编译llvm时，报错： CMake Error at CMakeLists.txt:729 (find_package):...

【解决】This is allowed only when policy CMP0079 is set to NEW.This-is-allowed-only-when-policy-CMP0079-is-set-to-NEWcmake最低版本设置为3 13以上，可解决。cmake_minimum_required(VERSION 3 13) can fix the first problem 参考：https: gitlab kitware com cmake cmake - issues 19693cma...

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