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

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33
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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
660 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
13k 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
12k 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
6k 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
5k 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
3answers
75k 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 ...
11
votes
1answer
972 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
2answers
193 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
526 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
2answers
4k 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 ...
7
votes
1answer
1k 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 ...
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
1answer
438 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
662 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 ...
5
votes
3answers
3k 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", ...
5
votes
1answer
850 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
1k 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 ...
5
votes
1answer
803 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
106 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
7k 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
2answers
3k 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
181 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
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
142 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
2k 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
2k 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 ...
3
votes
1answer
1k 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
431 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
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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
540 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 ...
2
votes
2answers
1k 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
3answers
1k 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 ...
2
votes
1answer
68 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
75 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
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
304 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
2answers
39 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
42 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
261 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
451 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
47 views

Why does glibc have 2 versions of the same functions? [closed]

I don't fully understand the versioning mechanism of glibc. In what cases do the developers decide a function needs a new version, and that function is no longer "backwards compatible" in glibc and a ...
2
votes
0answers
163 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
1answer
262 views

How to install glibc version that corresponds to GCC 4.4 on RHEL5

We have a program with executables built on RHEL6 using GCC4.4 and we need to run it on RHEL5.5. But RHEL5.5, by default does not have the necessary version of glibc. Has anyone faced such an issue ...
2
votes
1answer
289 views

Building custom glibc and compiling program against it

I've been scouring the internet for a couple of days now to get some information on how to (cross)compile glibc and then compile a program against it. So far, I've managed to compile glibc using the ...
2
votes
0answers
61 views

Determine libc version used to create static library

I am seeing symbol referencing errors with the static libraries I am using (available with OpenSPARC processor). I have glibc 2.15 on my system. How do I determine the version of glibc used to create ...
2
votes
1answer
501 views

LFS 7.5 - Glibc-2.19 compile errors at section 6.9, are they fatal to my LFS build?

I am using a host Ubuntu 14.04 system, and I am currently going through the Linux From Scratch guide here. At section 6.9, http://www.linuxfromscratch.org/lfs/view/stable/chapter06/glibc.html, after ...
2
votes
0answers
213 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 ...
2
votes
0answers
182 views

How to find out which package of libc6 I need?

I am running into following error: version GLIBC_2.14 not found version GLIBC_2.15 not found when trying to install software I need. Therefore, I decided to upgrade libc6 on my debian (Linux ...