glibc is GNU's implementation of the Standard C library.

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34
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2answers
873 views

Why and how are some shared libraries runnable, as though they are executables?

On 32-bit Linux systems, invoking this $ /lib/libc.so.6 and on 64-bit systems this $ /lib/x86_64-linux-gnu/libc.so.6 in a shell, provides an output like this: GNU C Library stable release ...
33
votes
4answers
2k views

Does bash open files in O_APPEND when using “>>” on linux?

If we use echo 1234 >> some-file then Documentation says that the output is appended. My guess is that, if some-file does not exist, then O_CREAT will make a new file. If > was used, then ...
26
votes
1answer
711 views

What would be the best way to work around this glibc problem?

I administer a Gentoo Hardened box that uses file capabilities to eliminate most of the need for setuid-root binaries (e.g. /bin/ping has CAP_NET_RAW, etc). Infact, the only binary I have left is ...
17
votes
4answers
15k views

Why is almost every program complaining about my locale?

I'm using Arch Linux, and I've followed the directions on the wiki about setting my locale. Nearly every program that runs complains about the locale - even locale. It looks like this: % locale ...
14
votes
3answers
91k views

Need to install glibc >= 2.14 on Wheezy

I am trying to get Protractor working for performing e2e angular testing, but protractor requires Selenium which requires ChromeDriver which requires glibc 2.14. My current development box is running ...
14
votes
2answers
10k views

What is the difference between i686 and x86_64 packages?

I have a machine with both glibc i686 and x86_64, and a very annoying problem with glibc. Is it normal to have two libraries of the same name installed on one computer? How can I know which library ...
14
votes
3answers
15k views

how to run new software without updating GLIBC?

I installed Mathematica 9 on an old Red Hat Enterprise Linux AS release 4 system. After the installation, I tried to start Mathematica, but following message came out: ...
12
votes
1answer
7k views

Ghost Vulnerability - CVE-2015-0235

Does the Ghost Vulnerability require access (as in being a logged in user) to the effected OS in question? Can someone clarify the 'remote attacker that is able to make an application call'? I only ...
12
votes
1answer
6k views

Installing two glibc alongside in debian/ubuntu

Is it possible to install and use two different glibc versions on the same machine. Where one version is only used to run legacy software, which relies on old glibc binaries? Is it possible to do ...
11
votes
1answer
1k views

Is there an easy method for installing binary builds of glibc?

Time and time again I see questions such as these: GLIBCXX 3.4.15 on Centos 6 CentOS 4.8 and glibc 2.5 And these are the types of solutions we're typically pushing: how to run new software ...
8
votes
1answer
2k views

Cross compiling GLIBC for my ARM SoC

I am seeing something really weird inside a chroot-ed Debian armel environment. But first, a bit of backstory... This is long, but the question is complex and any potential help depends on knowing ...
8
votes
2answers
244 views

Would it be possible to compile and bootstrap GNU?

A new Guix release came out some time ago. And I got the idea that if I can bootstrap glibc, gcc, and guix to HURD and Mach, I can have a non-Linux GNU system. But I also need some software like bash, ...
8
votes
2answers
689 views

How to make linux 'perf record' work for libc and libstdc++ symbols?

I'm using perf record -g on x86-64 Linux to profile a program. Several symbols in libc or libstdc++ have 0 as a parent: __GI___strcmp_ssse3 (libc) and strcmp@plt (libstdc++) for example. (I can ...
7
votes
1answer
3k views

Can new glibc versions be used with an old kernel?

Apparently glibc can be compiled with --enable-kernel to support older kernel versions. However, I haven't been able to find information on what kernel versions are supported on a particular glibc ...
6
votes
3answers
4k views

Is the Solaris libc based on the GNU libc?

On Solaris: basename.c #include <stdio.h> #include <libgen.h> int main(int argc, char* argv[]) { int len = strlen(argv[0]); char *bsname = basename(argv[0]); printf("%s\n", ...
6
votes
1answer
2k views

Using alternate libc with ld-linux.so hacks; cleaner method?

I have a legacy system with a very old glibc, which we can't upgrade without incurring a mountain of testing/validation work. I have needed to run newer programs (such as Java 1.7) on that system ...
6
votes
1answer
495 views

Where to find the source file of function pause(void) and sigsuspend(set)

I want to find the source file of pause and sigsuspend in the glibc-2.14.1 package. I grep the package and find the file sysdeps/posix/pause.c has a definition of function pause, the code is int ...
6
votes
1answer
1k views

How to rebuild glibc on Arch Linux?

It seems like MATLAB is royally screwed up on Linux, because it "dynamically loads some libs with static TLS", which doesn't mean anything to me other than I get bunches of errors. The suggested work ...
6
votes
1answer
14k views

How to update glibc to 2.14 in CentOS 6.5

I want to install Android NDK on my CentOS 6.5 machine. But when I ran the program, it says it needs glibc 2.14 to be able to run. My CentOS 6.5 only has Glibc 2.12 installed. So I tried to update ...
5
votes
1answer
884 views

EGLIBC vs GLIBC on laptops

From what I understand the primary cause of fork/branch of EGLIBC as compared to GLIBC was the problem with patches for ARM that Debian devs wanted to push upstream. I have slightly different ...
5
votes
1answer
963 views

What is in the output of “getent ahosts”?

What are the fields printed by getent ahosts DOMAIN? The output for getent hosts is a simple combination of IP and hostname. The getent ahosts has an additional third field that is, in all my test, ...
5
votes
1answer
117 views

Upgrade kernel for linux system without upgrading user apps/libs?

I built a custom Linux "recovery-cd" image that consists of a compressed initrd and boots via bcdedit (like Ubuntu Wubi) instead of a physical CD. It has various recovery tools for partition editing, ...
5
votes
1answer
5k views

How can I downgrade a glibc version?

I upgraded glibc for a reason that isn't around anymore so I want to downgrade it. The stupid thing is a lot of programs rely on glibc at the moment. I still have the 2.4 version on the system as the ...
4
votes
1answer
3k views

What is syscall-template.S?

I've come across a file syscall-template.S more specifically its location is .../sysdeps/unix/syscall-template.S What is this file? Where is it. It is not on my system and I cannot find it in ...
4
votes
1answer
187 views

How/why can Firefox packages work on all Linuxes?

How/why can a Firefox 64bit (or 32bit) package work on different Linux distributions since each Linux distribution has a different version for gcc, glibc, linux kernel, etc. ?
4
votes
3answers
4k views

Yum says a package is installed, and not installed, and it's blocking other packages from being installed

I am trying to install a new package (glibc-static), and I get the following error ---> Package nss-softokn-freebl.i686 0:3.14.3-18.el6_6 will be installed --> Finished Dependency Resolution ...
4
votes
1answer
1k views

CentOS 4.8 and glibc 2.5

How would I go about installing glibc 2.5 on CentOS 4.8? I know CentOS 4.8 has been EOL'd, which is all good and well. However, the environment that I am working in is using this version, and will ...
3
votes
4answers
144 views

None of the linux programs work except 'cd'

Before stating the question, here's what I did and observed before the problem started: On a fedora 18 Xfce, I tried compiling 3.6.10 kernel with a cdv driver, After many attempts, it finally ...
3
votes
2answers
3k views

llvm and clang on CentOS 5 without root permissions?

I am trying to have llvm and clang on a centOS 5 without root permissions. I tried to do it downloading llvm and clang src packages and trying the ususal configure, make and make install steps as ...
3
votes
3answers
2k views

Compiling a C program that defines a function getline by GCC

I'm trying to compile by GCC an old C program that defines and uses a function named getline, which conflicts with the function of the same name in the GNU C library. How can you compile it? Passing ...
3
votes
1answer
79 views

Unexpected sort order in en_US.UTF-8 locale

While trying to answer this question about SQL sorting, I noticed a sort order I did not expect: $ export LC_ALL=en_US.UTF-8 $ echo "T-700A Grouped" > sort.txt $ echo "T-700 AGrouped" >> ...
3
votes
1answer
2k views

Cannot update glibc on CentOS 7

I have CentOS 7 installed. I want to install the APR package for Apache, and I'm told I cannot install it because it requires at least glibc.2.14 while I have glibc.2.12 installed. I have downloaded ...
3
votes
2answers
531 views

Libraries crash after installing experimental version of libc6

My Debian system is not booting anymore after installing the experimental version of libc6. I've got this message on boot: /sbin/init: error while loading shared libraries: libsepol.so.1: ...
3
votes
2answers
2k views

No 32 development library error after install glibc-devel.i686

I am trying to install gcc 4.9.0 on centOS 6. During ./configure there is an error coming up: /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.4.7/libgcc_s.so when searching for ...
3
votes
1answer
317 views

Can't compile glibc for 64 bit system

I'm trying to compile glibc-2.16 statically for x64 system, ../configure --enable-kernel=2.6.9 --prefix=/run/shm/libc-static-64 --enable-static --enable-shared --host=i486-linux-gnu ...
3
votes
1answer
603 views

Make stdout and stderr be buffered by the same buffer

Is it possible to force glibc to use the same buffer for stdout and stderr? If I tee the both outputs: ./tests/tests 2>&1 | tee log I get mixed messages (i.e. messages are ordered inside ...
3
votes
0answers
560 views

SIGINFO on GNU Linux (Arch Linux) missing

I am developing an application and I would like it to print some runtime stats to the console on demand. kill and signals came to my mind immediately. Reading through Unix signals on Wiki, SIGINFO ...
2
votes
2answers
2k views

Can I build a linux distro with libc instead of glibc

I recently had a conversation with a friend who is a highly skill software engineer, and he showed me some articles outlining the fact libc was much better than glibc. I wonder if its possible to ...
2
votes
2answers
303 views

Location of Language and Locale files

I'm using OpenSUSE 13.2 with GNOME 3.14 Desktop Environment. My interface language is en_US while my locale is ar_SY. My locale contain some wrong data about months names (May and June) and I want to ...
2
votes
1answer
2k views

How to fix “skipping incompatible /usr/lib/libc.a”

I get the following error when I try to build an embedded Linux target on a 64 bit Fedora 16 (Verne): make[3]: Entering directory `/export/home/git/minerva-5.x/third_party/multifiles' ...
2
votes
1answer
74 views

Ghost vulnerability - recompile C/C++ programs?

I've CentOS 6.0 server with glibc-2.12-1.7.el6.x86_64 running many open source services and some of my own C programs. To fix ghost vulnerability, I need to update it to glibc-2.12-1.149.el6_6.5. ...
2
votes
2answers
1k views

How to install multiple glibc on fedora

I have Fedora 4 installed on my computer and it has glibc version 2.5.3, but I want to install a software that needs a glibc 2.7+. On the other hand, I have some programs that need this 2.5.3 version. ...
2
votes
1answer
343 views

How to set parameter i486 on glibc compiling process of x86_64 system?

My host: lfs@sam:/mnt/lfs/sources/glibc-build$ uname -m x86_64 lfs@sam:/mnt/lfs/sources/glibc-build$ In lfs(LFS-BOOK-6.8-HTML/chapter05/glibc.html) It says case `uname -m` in i?86) ...
2
votes
1answer
1k views

Upgrading Ubuntu 14.04 to glibc 2.20 or greater

I have an application written in Go that is crashing frequently and I think it's related to an issue that was fixed in glibc 2.20. My Ubuntu 14.04.3 LTS has glibc 2.19 according to ldd --version. ...
2
votes
2answers
54 views

Releasing linux software - compatibility

I want to release a C++ library for Linux. Is it true that (when no other libs are dynamically linked) only the glibc version decides compatibility to other Linux distributions? Is there a better way ...
2
votes
1answer
59 views

How do I create executables that can work on old systems on modern distros?

Typically even old programs (copied from systems with Linux kernel version 2.4) just run file on modern Linux systems, unless they depend on a lot of libraries or use frameworks. New programs, (often ...
2
votes
1answer
327 views

Why is =sys-libs/glibc-2.16's --enable-kernel is ignored on Gentoo Linux?

I'm trying to build eglibc support for old kernels, 2.6.9 in this case. So I set NPTL_KERNEL_VER in make.conf, and during configuration phrase I can see the --enable-kernel=2.6.9 parameter But this ...
2
votes
1answer
4k views

How to properly upgrade glibc?

The firmware of my NAS comes with a rather old version of glibc, namely 2.5. In order to cope with some precompiled binaries linked* to glibc 2.15, I would like to upgrade it. From some simple testing ...
2
votes
1answer
525 views

Configure & Compile syslog-ng from source, got: Threads are not supported on this platform

I have configure, gmake, and gmake installed syslog-ng-3.4.0alpha1 with eventlog-0.2.12 and other dependencies. From then output of the ./configure --prefix=/syslog --with-gnu-ld, I can see that the ...
2
votes
0answers
94 views

GLIBC not loading even after source compilation

While I am installing chef , I am getting below error. [root@centos Tools]# chef-server-ctl reconfigure /opt/opscode/embedded/bin/ruby: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ...