gnu

I am analyzing a linux exception code. By the way I can't understand gnu assembly syntax. svc_preempt: mov r8, lr 1: bl preempt_schedule_irq @ irq en/disable is done inside ldr r0, [tsk, #TI_FLAGS] @ get new tasks TI_FLAGS tst r0, #_TIF_NEED_RESCHED moveq pc, r8 @ go again b 1b In this code, I can see "b 1b", but I can't find "1b" label anywhere. And, #ifdef CONFIG_NEON adr r6, .LCneon_thumb_opcodes b 2f #endif call_fpe: #ifdef CONFIG_NEON adr r6, .LCneon_arm_opcodes 2: ldr r7, [r6], #4 @ mask value cmp r7, #0 @ end mask? beq 1f and r8, r0, r7 ldr r7, [r6], #4 @ opcode bits matching in mask

I'm trying to compile a test file: gcc -o test test.c -lg2c but I get the error: /usr/bin/ld: cannot find -lg2c If I use: gcc -o test test.c -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6 -lg2c then it works fine. So I added the path like so: LD_LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/3.4.6:$LD_LIBRARY_PATH and when I use $LD_LIBRARY_PATH it's listed there, but: gcc -o test test.c -lg2c still doesn't work, it gives the same error, I can't figure out why. I'm using CentOS (2.6.32-279.9.1.el6.x86_64), any help would be greatly appreciated. EDIT : compiler version: rpm -qa | grep gcc gcc-4.4.6-4

Suppose that I have two files, en.csv and sp.csv , each containing exactly two comma-separated records: en.csv : 1,dog,red,car 3,cat,white,boat sp.csv : 2,conejo,gris,tren 3,gato,blanco,bote If I execute join -t, -a 1 -a 2 -e MISSING en.csv sp.csv the output I get is: 1,dog,red,car 2,conejo,gris,tren 3,cat,white,boat,gato,blanco,bote Notice that all the missing fields have been collapsed. To get a "proper" full outer join, I need to specify a format; thus join -t, -a 1 -a 2 -e MISSING -o 0,1.2,1.3,1.4,2.2,2.3,2.4 en.csv sp.csv yields 1,dog,red,car,MISSING,MISSING,MISSING 2,MISSING,MISSING

The GNU bash manual tells me An indexed array is created automatically if any variable is assigned to using the syntax name[subscript]=value The subscript is treated as an arithmetic expression that must evaluate to a number. If subscript evaluates to a number less than zero, it is used as an offset from one greater than the array’s maximum index (so a subcript of -1 refers to the last element of the array). So I figure I will give it a try and get the following result: $ muh=(1 4 'a' 'bleh' 2) $ echo $muh 1 $ echo ${muh[*]} 1 4 a bleh 2 # so far so good so now I'll try a negative ... $ echo $

glibc和libc都是Linux下的C函数库， libc是Linux下的ANSI C的函数库； glibc是Linux下的GUN C的函数库； ANSI C和GNU C有什么区别呢？ ANSI C是基本的C语言函数库，包含了C语言最基本的库函数。这个库可以根据 头文件划分为 15 个部分，其中包括： <ctype.h>：包含用来测试某个特征字符的函数的函数原型，以及用来转换大小写字母的函数原型； <errno.h>：定义用来报告错误条件的宏； 浮点常数 (<float.h>)：包含系统的浮点数大小限制； 数学常数 (<math.h>)：包含数学库函数的函数原型； 标准定义 (<stddef.h>：包含执行某些计算C所用的常见的函数定义； 标准 I/O (<stdio.h>)：包含标准输入输出库函数的函数原型，以及他们所用的信息； 工具函数 (<stdlib.h>)：包含数字转换到文本以及文本转换到数字的函数原型，还有内存分配、随机数字以及其他实用函数的函数原型； 字符串操作 (<string.h>)、：包含字符串处理函数的函数原型； 时间和日期 (<time.h>)：包含时间和日期操作的函数原型和类型； 可变参数表 (<stdarg.h>)：定义宏，用于处理未知数值和类型的函数的参数列表； 信号 (<signal.h>)：包含函数原型和宏，用于处理程序执行期间可能出现的各种条件；

What GNU/Linux command-line tool would I use for performing a search and replace on a file? Can the search text, and replacement, be specified in a regex format? Cristian Ciupitu sed 's/a.*b/xyz/g;' old_file > new_file GNU sed (which you probably have) is even more versatile: sed -r --in-place 's/a(.*)b/x\1y/g;' your_file Here is a brief explanation of those options: -i[SUFFIX], --in-place[=SUFFIX] edit files in place (makes backup if extension supplied) -r, --regexp-extended use extended regular expressions in the script. The FreeBSD version also supports these options. The NetBSD and OpenBSD

I downloaded MinGW following the first link here https://isocpp.org/get-started and now I need to configure it in SubimeText 3. I know I should go to Tools > Build System > New Build System... But what should I specify there? I use Win7x64. And MinGW is in C:\MinGW The complete reference for build systems is here . The first thing you need to do is make sure that the C:\MinGW\bin directory is in your PATH , then restart Sublime so the change gets picked up. Once you've done that, create a new build system with the following contents: { "cmd": ["gcc", "${file}", "-o", "${file_base_name}.exe"],