Introduction Motivation Most Linux and Unix-based systems rely on the X Window System (or simply X) as the low-level protocol for building bitmap graphics interfaces. On these systems, the X stack has grown to encompass functionality arguably belongi…

转:https://blog.csdn.net/u013165704/article/details/80709547 1. 前言 上篇文章(Linux graphic subsytem(1)_概述)介绍了linux图形子系统基本的软件框架,以及GUI.Windowing system.3D渲染等基本概念.文中提到了linux DRI(Direct Render Infrastructure)框架,但限于篇幅,没有过多介绍. 蜗蜗觉得,DRI在当前(或者说将来)的linux图形子系统中,有着举足…

在iOS开发中经常遇到的一个错误是Undefined symbols for architecture arm64,这个错误表示工程某些地方不支持arm64指令集.那我们应该怎么解决这个问题了?我们不仅要解决这个问题,更要了解出现这个问题的根源.这样根本上杜绝这类问题发生. 对于iOS设备来说iOS的指令集有armv6.armv7.armv7s.arm64这样四种,不同型号的iOS设备使用不同的指令集,下面是各自的区别: armv6 iPhone.iPhone 3G iPod 1G.iPod 2…

来自:Oracle® Database Installation Guide 12_c_ Release 1 (12.1) for Linux Oracle base目录命名规范: /pm/s/u 例如:/u01/app/oracle /u01/app/grid Naming Mount Points for Very Large Databases (VLDBs) /h/q/d 例如:/u01/app/oracle/oradata/test and /u02/app/oracle/oradat…

我们来看看EF的框架设计吧: The following figure shows the overall architecture of the Entity Framework. Let us now look at the components of the architecture individually: EDM (Entity Data Model): EDM consists of three main parts - Conceptual model, Mapping and…

[Architecture] 系统架构正交分解法 前言 随着企业成长,支持企业业务的软件,也会越来越庞大与复杂.当系统复杂到一定程度,开发人员会发现很多系统架构的设计细节,很难有条理.有组织的用一张大蓝图去做分析设计.先前在InfoQ上看到一篇文章:「亿级用户下的新浪微博平台架构 - 卫向军」,在这篇文章里使用正交分解法,来分析设计新浪微博平台的系统架构. 透过正交分解法这样表格式的条列与分解,可以让开发人员清楚理解每个象限的关注点,进而去理解与组织整个系统架构所使用到的框架技术.本篇文章介绍如…

To get an idea of what all of this stuff “does,” let me start off with an update on the average day at Stack Overflow. So you can compare to theprevious numbers from November 2013, here’s a day of statistics from February 9th, 2016 with differences s…

简单来说,Undefined symbols基本上等于JAVA的ClassNotFoundException,最常见的原因有这几种: build的时候没有加framework 比如说,有一段代码我用了OpenGL,引入了头文件 #import <OpenGLES/ES2/glext.h> build的时候,compile阶段没有问题,但是link就报错Undefined symbols for architecture xxx(这里xxx可能是armv7s,armv7或者arm64,取决于配置…

Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_The49DayPersonalFullscreenGiftModel", referenced from: objc-class-ref in The49DayPersonalRoomGiftModel.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command faile…

错误如下: Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_RoutingHTTPServer", referenced from: 出现类似  Undefined symbols for architecture x86_64  错误,一般是缺少包的引用,请尝试xcode-->项目-->Build phases-->Link Binaray With Libraries-->选择“+”号--&…