gnu

* in front of instruction operand, GNU assembly, AMD64

由 无人久伴 提交于 2020-01-06 17:26:12
问题 I have been trying to learn to write assembly code for the AMD64 processor. I have been looking at code generated by gcc. Eventually, I began seeing instructions such as call *(%rax) What is the * doing in front of the operand? Something like this came up in the System V ABI document I'm reading, and the answer to the above will help me continue on. Here is an example of the syntax used in context, taken from the System V ABI document itself: // System V ABI suggested implementation of a // C

CentOS6.5手动升级gcc4.8.2

由 孤者浪人 提交于 2020-01-06 01:40:41
一、简易安装 操作环境 CentOS6.5 64bit，原版本4.4.7，不能支持C++11的特性~，希望升级到4.8.2 不能通过yum的方法升级，需要自己手动下载安装包并编译 本文记录了在CentOS上编译安装gcc 4.8.4的过程。 1、安装依赖三大件 按顺序安装gmp、mpfr、mpc，注意要都是disable share Shell 1 2 3 4 5 wget ftp : / / gcc .gnu .org / pub / gcc / infrastructure / gmp - 4.3.2.tar.gz tar - xzvf gmp - 4.3.2.tar.gz . / configure -- enable - shared = no make - j4 sudo make install Shell 1 2 3 4 5 6 7 wget ftp : / / gcc .gnu .org / pub / gcc / infrastructure / mpfr - 2.4.2.tar.bz2 tar - xjvf mpfr - 2.4.2.tar.bz2 cd mpfr - 2.4.2 . / configure -- enable - shared = no make - j4 sudo make install Shell 1 2 3 4 5 6 wget ftp

automake third party libraries

由 早过忘川 提交于 2020-01-05 10:09:40
问题 How to compile and link third party libraries with automake? My file structure is: program/ | +--src/ | | | +--Makefile.am | +--main.cpp | +--lib/ | | | +--Makefile.am | +--library.cpp | +--Makefile.am +--configure.ac +--README Contents of automake files are pretty generic: # src/Makefile.am bin_PROGRAMS = program program_SOURCES = main.cpp # Makefile.am SUBDIRS = src lib dist_doc_DATA = README # configure.ac AC_INIT([program], [1.0]) AM_INIT_AUTOMAKE([-Wall]) AC_PROG_CXX AC_CONFIG_HEADERS(

Generating standalone MEX file with GNU compilers, including libraries

由 纵饮孤独 提交于 2020-01-05 07:08:33
问题 I have written and compiled a MEX function to be called from a MATLAB routine, it runs great on my computer. However, when I try to have a different computer run my routine, it breaks with an error saying the module does not exist. My MEX function is referencing the GSL libraries, and some others. I want to know if it is possible to compile my MEX function so that is a standalone. When I say standalone I mean that if I just copy the MEX file to another computer, and there are no libraries or

How to use GNU parallel to run a list of commands where 4 commands run simultaneously

由 爷，独闯天下 提交于 2020-01-04 15:12:06
问题 I have list of shell commands that I'd like to call. Up to four processes shall run at the same time. As soon as the process count drops below 4, the next command is sent to the shell until all command have finished. I already got a "partly" working solution from stackoverflow fellows that however rely on wait -n which is not available on my debian wheezy installation. Link to other stackoverflow question One guy mentioned GNU Parallel. Can this be achieved? Any guidance is really appreciated

Linux入门

由 给你一囗甜甜゛ 提交于 2020-01-03 23:15:15
Linux入门 操作系统的分类 Windows系列操作系统，Unix类操作系统，Linux类操作系统，Mac操作系统 提问：为什么要去学习Linux？ 同学甲可能要问，你介绍了这么多有关Linux的知识，但我还是懵逼，我从小学去网吧打泡泡堂用的就是Windows，上了这么多年学也是用的Windows，为什么要让我学这个Linux？ 同学乙可能要问，听起来Linux好像很高大上，如果我放弃Windows去学Linux，用不了多久就会升职加薪当上总经理赢取白富美吗？想想还很激动。。。 那么我要回答了： 　　如果Windows意味着生活和游戏，那么Linux就代表着严谨和工作，学习Linux代表着你要开发软件，你要测试程序，你要维护服务器。那么依据呢？请看如下： 由此可见，无论你是python后端开发，还是python测试开发，又或者是爬虫、数据挖掘开发，统统都必须学会Linux，这是开发者必须的技能。 　　我们都知道Linux这玩意是在电脑上运行的，所以说Linux就是一组软件，问题是这个软件是操作系统还是应用程序？而且Linux可以在哪些种类的电脑上运行呢？Linux来自哪里？为什么Linux不收钱？（万恶的windows分为各种收费版、家庭版、专业版、企业版。。。。）这些问题我们是不是都得了解，以免人家和你聊linux，俺不会尴尬呀。 什么是操作系统 我们都知道windows 7

BSD md5 vs GNU md5sum output format?

由 為{幸葍}努か 提交于 2020-01-03 09:06:12
问题 Any one knows why BSD md5 program produces hash output in this format ... MD5 (checksum.md5) = 9eb7a54d24dbf6a2eb9f7ce7a1853cd0 ... while GNU md5sum produces much more sensible format like this? 9eb7a54d24dbf6a2eb9f7ce7a1853cd0 checksum.md5 As far as I can tell, the md5sum format is much easier to parse and makes more sense. How do you do md5sum -check with md5? And what do the -p, -q, -r, -t, -x options mean? man md5 says nothing about those options! :| 回答1: Historical reasons, i guess.

Is Python on every GNU/Linux distribution?

由 会有一股神秘感。 提交于 2020-01-02 06:10:17
问题 I would like to know if is Python on every G/L distribution preinstalled or not. And why is it so popular on GNU/Linux and not so much on Windows? 回答1: Well python does not come on ALL GNU/Linux distros but is present on most of the popular Linux home user distributions (Ubuntu and Fedora Core for example), possibly because most of the application of Gnome desktop environment and KDE use python 2.5+ (not python 3 yet) interpreters. Since python is almost integrated onto the system/environment

How do I set GNU G++ compiler in Visual studio 2008

由 ↘锁芯ラ 提交于 2020-01-01 06:14:29
问题 How do I set my Visual studio 2008 compiler to GNU GCC. Can I also make it specific to projects? I didn't find any conclusive answer. Thank you. 回答1: You can't use the compiler directly. You can, however, invoke a makefile instead of using the built-in build system. Example of configuration: Install MinGW (I guess this step is already done), including mingw32-make Create a makefile for mingw32-make called MinGWMakefile , with 3 targets: clean , build , and rebuild . This can be very tedious

How do I set GNU G++ compiler in Visual studio 2008

由 夙愿已清 提交于 2020-01-01 06:14:11
问题 How do I set my Visual studio 2008 compiler to GNU GCC. Can I also make it specific to projects? I didn't find any conclusive answer. Thank you. 回答1: You can't use the compiler directly. You can, however, invoke a makefile instead of using the built-in build system. Example of configuration: Install MinGW (I guess this step is already done), including mingw32-make Create a makefile for mingw32-make called MinGWMakefile , with 3 targets: clean , build , and rebuild . This can be very tedious
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