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C++使用多核编译,加快编译速度 - C/C++ - 清泛网 - 专注C/C++及内核技术

...行:加 /MP Linux make编译时只需要加 -j 指定编译使用CPU核心数: make -j 4 //使用4个核编译 make -j //不指定数量,则自动探测CPU核心数量,全部参与编译 Eclipse(实际也是指定make -j) 项目属性 -> c/c++ Build -> Behavior -> Enable...
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国产操作系统迎发展机遇 业内呼吁建立联盟打造生态 - 资讯 - 清泛网 - 专注...

...结合作。据了解,目前从事操作系统超过十家企业,从事CPU研发的有六七家。倪光南认为:“我们已经有一些掌握操作系统核心技术、掌握CPU核心技术的若干企业,但应该要集中力量办大事。形成一个联盟,制定统一的标准,完...
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Intel SMID指令集编译错误: inlining failed in call to always_inline \'x...

... target specific option mismatch xxxintel_smid_compile_error最近在使用CPU指令集优化代码的时候,编译出错,报错如下: usr lib64 gcc x86_64-suse-linux 7 include avx2intrin h:252:1: error: inlining failed in call to always_i 最近在使用CPU指令集优化代码的时候,...
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C++11 introduced a standardized memory model. What does it mean? And how is it going to affect C++ p

...n does not make reference to any particular compiler, operating system, or CPU. It makes reference to an abstract machine that is a generalization of actual systems. In the Language Lawyer world, the job of the programmer is to write code for the abstract machine; the job of the compiler is to act...
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Is multiplication and division using shift operators in C actually faster?

...uages, they're specifically designed to hide the details of the underlying CPU instruction set. To satisfy their language Standards, they must support multiplication and shifting operations (and many others) even if the underlying hardware doesn't. In such cases, they must synthesize the required ...
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Using git repository as a database backend

... terms of normal ORMs, such as ActiveRecord, Hibernate, DataMapper, Tower, etc. As much as I've searched for, there's zero existing free codebase for doing that approach to git from popular frameworks. There is at least one service that somehow manages to do that efficiently — that is obviously gi...
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What are the most common naming conventions in C?

...typically are in lower case (in my experience) rather than the C++/Java/C#/etc convention of making the first letter a capital but I guess it's possible in C too. C++ is more complex. I've seen a real mix here. Camel case for class names or lowercase+underscores (camel case is more common in my ex...
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json_decode to array

...json_decode($jsondata, true); foreach ($arr as $k=>$v){ echo $v; // etc. } If $jsondata is ever returned as an empty string (as in my experience it often is), json_decode will return NULL, resulting in the error Warning: Invalid argument supplied for foreach() on line 3. You could add a lin...
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MFC RadioButton用法详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...m_RBtGroup3); DDX_Control(pDX, IDC_RADIO9, m_RBtGroup4); } 问题一:如何更改RadioButton默认值??? 方法1 在定义控件变量时,默认变量初值为-1,表示此组的任何RadioButton均不被选中,如果需要改变初始默认按钮的设置情况,...
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What does Java option -Xmx stand for? [duplicate]

...ting these in more detail, so manual pages for the arguments of a command, etc. – Craig Brett Feb 22 '18 at 8:51 add a comment  |  ...