glibc

I built the latest glibc and now i'm having some trouble with functions in coreutils like ls or cat or anything else like vim . My error is -bash-4.0$ cat cat: error while loading shared libraries: __vdso_time: invalid mode for dlopen(): Invalid argument and I built, glibc without errors with the following configure ../glibc/configure --prefix=/home/ex/uid377/glibbuilt On older versions, like 2.14, running the utilities results in a segmentation fault. -bash-4.0$ ./pwd ./pwd: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./pwd) -bash-4.0$ LD_LIBRARY_PATH=/home/ex/uid377/glibc

Consider the following code: #include <stdio.h> #include <time.h> #include <math.h> // Compile with gcc -lrt -lm -o test_clock test_clock.c #define CLOCK CLOCK_MONOTONIC int main(int argc, char** argv) { double temp, elapsed; int j; struct timespec requestStart, requestEnd, req; // Pseudo-sleep clock_gettime(CLOCK, &requestStart); temp = 0; for(j=0; j < 40; j++) temp += sin(j); clock_gettime(CLOCK, &requestEnd); elapsed = ( requestEnd.tv_sec - requestStart.tv_sec ) / 1e-6 + ( requestEnd.tv_nsec - requestStart.tv_nsec ) / 1e3; printf("Elapsed: %lf us\n", elapsed); // Nanosleep clock_gettime

Where can I get a definitive answer, whether my memcpy (using the eglibc implementation that comes with Ubuntu) is thread safe? - Honestly, I really did not find a clear YES or NO in the docs. By the way, with "thread safe" I mean it is safe to use memcpy concurrently whenever it would be safe to copy the date byte for byte concurrently. This should be possible at least if read-only data are copied to regions that do not overlap. Ideally I would like to see something like the lists at the bottom of this page in the ARM compiler docs. You can find that list here, at chapter 2.9.1 Thread-Safety

I am trying to compile my own glibc. I have a directory glibc , which contain the glibc source code I downloaded from the internet. From that directory I typed mkdir ../build-glibc . Now from the build-glibc directory I typed ../glibc/configure , which performed the configuration. Now I'm not sure how to call make . I can't call it from glibc directory since it doesn't have the configuration set, neither I can call it from build-glibc , since makefile is not in that directory. How do I solve this problem? The Makefile is going to exist in your build-glibc directory if the configure script

11.6 MariaDB安装 11.7/11.8/11.9 Apache安装 扩展 apache dso https://yq.aliyun.com/articles/6298 apache apxs http://man.chinaunix.net/newsoft/ApacheMenual_CN_2.2new/programs/apxs.html apache工作模式 https://blog.csdn.net/STFPHP/article/details/52954303 11.6 MariaDB安装： 基本类似于MySQL，一样使用二进制的免编译包 cd /usr/local/src wget https://downloads.mariadb.com/MariaDB/mariadb-10.2.6/bintar-linux-glibc_214-x86_64/mariadb-10.2.6-linux-glibc_214-x86_64.tar.gz tar zxvf mariadb-10.2.6-linux-glibc_214-x86_64.tar.gz mv mariadb-10.2.6-linux-glibc_214-x86_64 /usr/local/mariadb cd /usr/local/mariadb ./scripts/mysql_install_db -

安装mariadb ：（二进制免编译方式） cd /usr/local/src wget https://downloads.mariadb.com/MariaDB/mariadb-10.2.6/bintar-linux-glibc_214-x86_64/mariadb-10.2.6-linux-glibc_214-x86_64.tar.gz tar zxvf mariadb-10.2.6-linux-glibc_214-x86_64.tar.gz mv mariadb-10.2.6-linux-glibc_214-x86_64 /usr/local/mariadb cd /usr/local/mariadb ./scripts/mysql_install_db --user=mysql --basedir=/usr/local/mariadb/ --datadir=/data/mariadb cp support-files/my-small.cnf /usr/local/mariadb/my.cnf #根据机器情况选择配置，large,medium,small区别是配置里缓存缓冲参数不同；此步骤没将配置拷贝到默认的/etc/目录下，后续需修改启动配置 #vim /usr/local/mariadb/my.cnf 基本不用改 cp support-files/mysql

First I tried to reverse engineer it a bit: printf ' #include <stdio.h> int main() { puts("hello world"); } ' > main.c gcc -std=c99 -pie -fpie -ggdb3 -o pie main.c echo 2 | sudo tee /proc/sys/kernel/randomize_va_space readelf -s ./pie | grep -E 'main$' gdb -batch -nh \ -ex 'set disable-randomization off' \ -ex 'start' -ex 'info line' \ -ex 'start' -ex 'info line' \ -ex 'set disable-randomization on' \ -ex 'start' -ex 'info line' \ -ex 'start' -ex 'info line' \ ./pie \ ; Output: 64: 000000000000063a 23 FUNC GLOBAL DEFAULT 14 main Temporary breakpoint 1, main () at main.c:4 4 puts("hello world")