glibc

查看 glibc的版本号命令： ldd --version 或 rpm -qi glibc 查看操作系统支持的glibc版本， 64位执行命令 strings /lib64/libc.so.6 |grep GLIBC 32位系统 请执行 strings /lib/libc.so.6 |grep GLIBC glibc安装 1, 下载安装包，下载地址： http://ftp.gnu.org/pub/gnu/glibc/ 2，解压： tar - xzvf glibc - 2.14 . tar . gz 3， 进入目录 ： cd glibc-2.14 4，依次执行如下命令： mkdir build // 在glibc-2.14目录下建立build文件夹 cd build // 进入build目录 mkdir -p /opt/ glibc - 2.14 //创建 glibc 安装目录 ../ configure -- prefix = /opt/ glibc - 2.14 // 配置glibc并设置当前glibc-2.14安装目录 make && make install // 编译安装glibc-2.14库 注意事项： 当有如下错误时： checking whether ranlib is necessary... no checking LD_LIBRARY_PATH variable

声明 glibc官方地址 http://www.gnu.org/software/libc/ 查看现在glibc库版本 strings /lib64/libc.so.6 |grep GLIBC 下载安装 wget http://ftp.gnu.org/gnu/glibc/glibc-2.14.tar.gz 因为glibc库使用广泛，为了避免污染当前系统环境，最好自定义安装目录，使用时定义一下环境变量就行了。具体步骤如下： tar xvf glibc-2.14.tar.gz cd glibc-2.14 mkdir build cd build ../configure --prefix=/opt/glibc-2.14 make -j4 make install 查看现libc链接 ls -l /lib64/libc.so.6 /lib64/libc.so.6 -> libc-2.12.so 备份原链接 mv /lib64/libc.so.6 /lib64/libc.so.6.bak 建立新libc链接 ln -s /opt/glibc-2.14/lib/libc-2.14.so /lib64/libc.so.6 加入peofile vim /etc/profile export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH

Can I use fprintf(stderr) in a signal (SIGALRM) handler with glibc/linux? No you cannot. Check the manpage signal(7) for a list of async-signal-safe functions. fprintf is not included in that list. If you don't need formatting then you can use write(STDERR_FILENO, <buf>, <buflen>) to write to stderr. This is not safe, quoting IBM DeveloperWorks article about Signal Handling Safety Suppose the signal handler prints a message with fprintf and the program was in the middle of an fprintf call using the same stream when the signal was delivered. Both the signal handler's message and the program's

I'm working on automatic C++ code testing using Python. So I have a Python script that compiles and executes C++ code. When the C++ code crashs, libc output is visible from my Python script output, even if I redirected cout and cerr of the C++ program being executed to /dev/null . Here is a sample isolating the problem: #! /usr/bin/env python # -*- coding: utf8 *-* import sys import os.path import subprocess import shutil import tempfile import string import argparse bug_folder = tempfile.mkdtemp("bug") # Create main.cpp with open( os.path.join(bug_folder,'main.cpp'), "w") as mainfile:

when I try to compile this simple code from terminal: #include<stdio.h> int main(void) { printf("%f\n",sqrt(10)); return 0; } using gcc main.c command, it gets compiled and a.out gives correct answer. It means that that maths functions are added in C standard library which gets linked automatically. But if compile the same code in Eclipse IDE without adding any library to properties, it gives undefined reference error. It means maths functions are not part of C standard library. What is the truth? You may be seeing constant folding here, where using a constant in the math function call will

alpine制作jdk镜像 alpine Linux 简介 1.Alpine Linux是一个轻型Linux发行版，它不同于通常的Linux发行版，Alpine采用了musl libc 和 BusyBox以减少系统的体积和运行时的资源消耗。 2.Alpine Linux提供了自己的包管理工具：apk(注意：ubuntu中是apt-get)，我们可以通过https://pkgs.alpinelinux.org/packages 查询包信息 3.Alpine Docker镜像继承了Alpine Linux发行版的这些优势，相比于其他Linux Docker镜像，它的体积非常小 基于alpine 制作JDK8 镜像 #1. 下载镜像 docker pull alpine:latest #2. 创建并编辑dockerfile touch Dockerfile //创建 vi Dockerfile //编辑 dockerfile内容 #1.指定基础镜像，并且必须是第一条指令 FROM alpine:latest #FROM alpine:3.10 #2.指明该镜像的作者和其电子邮件 MAINTAINER xyz "xyz@qq.com" #3.在构建镜像时，指定镜像的工作目录，之后的命令都是基于此工作目录，如果不存在，则会创建目录 WORKDIR /cjh_docker/jdk #4

I was hacking printf() of glibc in one of my project and encountered some problem. Could you please give some clues? And one of my concern is why the same solution for malloc/free works perfect! As attached, “PrintfHank.c” contains my own solution of printf() which will be preloaded before standard library; and “main.c” just outputs a sentence using printf(). After editing two files, I issued following commands: compile main.c gcc –Wall –o main main.c create my own library gcc –Wall –fPIC –shared –o PrintfHank.so PrintfHank.c –ldl test the new library LD_PRELOAD=”$mypath/PrintfHank.so” $mypath

wget http://ftp.gnu.org/gnu/glibc/glibc-2.23.tar.gz tar -zxvf glibc-2.23.tar.gz cd glibc-2.23 mkdir build cd build ../configure --prefix=/usr --disable-profile --enable-add-ons --with-headers=/usr/include --with-binutils=/usr/bin make -j8 make install 来源： https://www.cnblogs.com/hshy/p/11975551.html

1、alpine制作jdk镜像 2、Alpine制作jre镜像（瘦身） 3、Docker镜像上传至阿里云 alpine 制作 jdk 镜像 alpine Linux简介 1.Alpine Linux是一个轻型Linux发行版，它不同于通常的Linux发行版，Alpine采用了musl libc 和 BusyBox以减少系统的体积和运行时的资源消耗。 2.Alpine Linux提供了自己的包管理工具：apk(注意：ubuntu中是apt-get)，我们可以通过https://pkgs.alpinelinux.org/packages 查询包信息 3.Alpine Docker镜像继承了Alpine Linux发行版的这些优势，相比于其他Linux Docker镜像，它的体积非常小 对比常用的、没有压缩过的基础镜像（查看当前的:latest标签）： Alpine - 4.8MB centos - 124.8 MB Debian - 125.1MB Centos - 196MB 4.建议使用Alpine Linux 3.10.0版本，这也是 v3.10 稳定系列的首个版本 alpine:3 .10 基于alpine制作JDK8镜像 #1.下载镜像 docker pull alpine:latest #2.创建并编辑dockerfile touch Dockerfile vi