CMAKE: switch between clang / g++ and libc++ /libstdc++
来源： https://stackoverflow.com/questions/43662736/cmake-switch-between-clang-g-and-libc-libstdc
libc++
CMAKE: switch between clang / g++ and libc++ /libstdc++
来源： https://stackoverflow.com/questions/43662736/cmake-switch-between-clang-g-and-libc-libstdc
CMAKE: switch between clang / g++ and libc++ /libstdc++
来源： https://stackoverflow.com/questions/43662736/cmake-switch-between-clang-g-and-libc-libstdc
面试系列之C++的对象布局【建议收藏】
我们都知道C++多态是通过虚函数表来实现的，那具体是什么样的大家清楚吗？开篇依旧提出来几个问题： 普通类对象是什么布局？ 带虚函数的类对象是什么布局？ 单继承下不含有覆盖函数的类对象是什么布局？ 单继承下含有覆盖函数的类对象是什么布局？ 多继承下不含有覆盖函数的类对象是什么布局？ 多继承下含有覆盖函数的类对象的是什么布局？ 多继承中不同的继承顺序产生的类对象布局相同吗？ 虚继承的类对象是什么布局？ 菱形继承下类对象是什么布局？ 为什么要引入虚继承？ 为什么虚函数表中有两个析构函数？ 为什么构造函数不能是虚函数？ 为什么基类析构函数需要是虚函数？ 要回答上述问题我们首先需要了解什么是多态。 什么是多态 多态可以分为编译时多态和运行时多态。 编译时多态：基于模板和函数重载方式，在编译时就已经确定对象的行为，也称为静态绑定。 运行时多态：面向对象的一大特色，通过继承方式使得程序在运行时才会确定相应调用的方法，也称为动态绑定，它的实现主要是依赖于传说中的虚函数表。 如何查看对象的布局 在gcc中可以使用如下命令查看对象布局： g++ -fdump-class-hierarchy model.cc后查看生成的文件 在clang中可以使用如下命令： clang -Xclang -fdump-record-layouts -stdlib=libc++ -c model.cc // 查看对象布局
c++的clock使用说明
The high_resolution_clock is not implemented consistently across different standard library implementations, and its use should be avoided. It is often just an alias for std::chrono::steady_clock or std::chrono::system_clock, but which one it is depends on the library or configuration. When it is a system_clock, it is not monotonic (e.g., the time can go backwards). For example, for gcc's libstdc++ it is system_clock, for MSVC it is steady_clock, and for clang's libc++ it depends on configuration. Generally one should just use std::chrono::steady_clock or std::chrono::system_clock directly
std::async in clang 3.0 + libc++ doesn't work?
问题 I just compiled and installed clang+llvm 3.0 on my ubuntu 10.04, and also libc++ from svn. As the status in libc++ shows thread support is complete, I wanted to try std::async. So I follow the example given by Anthony Williams in http://www.justsoftwaresolutions.co.uk/threading/multithreading-in-c++0x-part-8-futures-and-promises.html And just make minor change to make it compile: #include <future> #include <iostream> int calculate_the_answer_to_LtUaE() { return 42; } void do_stuff() { std:
Mixing stdc++ and libc++ in an iOS project
问题 I am having a difficult time configuring an iOS project which uses a static library linked against the old libstdc++ that gcc used. That library is 32 and 64-bit. There are 6 libraries (libssl.a for example) that are 32-bit and must be updated. If I compile those libraries from source, they will be automatically linked with libc++, which will result in my linker complaining. Therefore, here are my questions: 1) Is there any way to have a single static library inside the project use libstdc++,
Should I use libc++ or libstdc++? [closed]
问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 3 years ago . I am developing command line interface executables for both osx and linux using c/c++. The project will link against opencv. Should I use libc++ or libstdc++? 回答1: I would use the native library for each OS i.e. libstdc++ on GNU/Linux and libc++ on Mac OS X. libc++ is not 100
MAC os 下 ldd
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> ootool -L cquery otool -L cquery 1 ↵ cquery: @rpath/libclang.dylib (compatibility version 1.0.0, current version 7.0.0) /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 400.9.0) /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1252.50.4) 来源： oschina 链接： https://my.oschina.net/innovation/blog/3152470
Can't link libFuzzer.a using clang with libc++
问题 I'm trying to link together: libFuzzer.a, compiled with clang++-5.0 and -std=c++11 my fuzz driver, compiled with clang++-5.0 and -std=c++11 -stdlib=libc++ libcurl, compiled with clang-5.0 Specifically, this linker command is being executed: /bin/bash ../../libtool --silent --tag=CXX --mode=link clang++-5.0 -I../../include -I../../lib -I../../lib -I../../tests/fuzz -fsanitize=address -fsanitize-address-use-after-scope -fsanitize-coverage=trace-pc-guard,trace-cmp -std=c++11 -stdlib=libc++ -o