Questions tagged [shared-library]

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Only list direct (resolved) dependency paths with ldd, readelf or objdump

With ldd I can get a flat list of unique, fully resolved paths to all shared libraries that an executable depends on. For a script where I'm bundling a binary, I'm copying over these shared libs. ...
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What is the entry point of a so (shared object?)'s source code?

Specifically I'm trying to port libcroco's functionality to a cross-platform BASIC dialect and need to know where to start looking at the code. In short, what is the equivalent of Window's DLLMAIN?
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Accidently moved /usr/lib64 how can I restore

I was trying to free up space and clueless moved /usr/lib64/ to "/srv/maraba_ssd_scratch/apelin/root_files/usr_lib64". The next thing I was going to do is create a symlink in usr for lib64 to point to ...
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1answer
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error while loading shared libraries; file too short

I am working on a CentOS 7 workstation. I had installed Rstudio and it was working fine until recently. But now, if I try to launch it at http://localhost:8787/ I get an error that says Unable to ...
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QNX throws an error as login: -sh: cant access shared libraries

When I am trying to login with non root user the QNX throws an error as login: -sh: cant access shared libraries. Why is it so? I have already checked the permissions they are as below: /lib (...
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1answer
30 views

Why (and how) do I have (seemingly!) duplicate symbols in my shared libraries?

I happened to need to work out which symbols were exported by which library from a flat list of exported shared library symbols. There were just enough symbols (20 or so) in the list that I wasn't ...
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error while loading shared libraries [Packet Tracer] kali linux

When I try to open "packet tracer" in Kali Linux, the result is : ./PacketTracer7: error while loading shared libraries: ./libpng12.so.0: cannot read file data: Error 21
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1answer
37 views

Specifying Depends correctly in debian/control file

I'm building a runtime-shared-library package libfoo0.deb where 0 here is a major package version and adhering to the naming conventions specified in the Debian policy. The problem is I want to ...
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1answer
46 views

Activate-noawait ldconfig trigger for runtime library package

I'm reading the Debian policy section on runtime shared library package and came across the following statement: Any package installing shared libraries in one of the default library directories ...
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2answers
89 views

error while starting open ssh : /usr/sbin/sshd: /lib/libcrypt.so.1: version `XCRYPT_2.0' not found (required by /usr/sbin/sshd)

I am working on an embedded board, to access that board I need ssh to work smoothly. Currently, for debugging purpose I am using serial connection to access the board. Now, when I try to start ...
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After setcap on executable, curl_easy_perform throws out of memory error

I've cross compiled an executable to run on Debian Stretch that requires a specific version of cURL (greater than 7.56) to run, and needs specific capabilities during execution. So on the executable ...
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1answer
33 views

unixODBC: Cannot load libmaodbc.so

I'm working on an embedded platform and I am trying to access a MariaDB through unixODBC. Trying to test the connection with isql I get the response: isql -v mydsn myuser mypw [01000][unixODBC][...
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1answer
29 views

Packaging library distribution

I'm working on some shared library and now stuck with the problem that some software refused to pick the newer version, but some has to use the latest since it has some crucial changes. So I need to ...
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1answer
58 views

Where is libsystemd.so located on ARM devices?

I have an ARM Tinkerboard running Debian 9.8 (Stretch). Systemd version is 232. I'm working on a program that can be run from userland or as a daemon. If it is run as a daemon, then dlopen and dlsym ...
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2k views

Why don't Unix/Linux systems traverse through directories until they find the required version of a linked library?

I have a binary executable named "alpha" that requires a linked library (libz.so.1.2.7) which is placed at /home/username/myproduct/lib/libz.so.1.2.7 I export the same to my terminal instance before ...
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SIGSEGV on dlopen with gdb

I'm currently building a shared library. The goal is to inject this lib in a process. Unfortunaly when I inject this lib in the process I get a SIGESGV about ostream. Here is a MWE to reproduce the ...
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1answer
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Linux Prog has 24 Libs Fails LDD, and strace shows 692 “1 ENOENT” during prog library reads

I am requesting opinions on expected and desired outcome of prog initialization, specifically loading of shared libraries for a program that I do not have source code. All code delivered via RPMs. ...
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apt-get install cifs-utils corrupted system libraries — caused chaos

My Linux libraries seem to have suffered a severe corruption just after running (as root): apt-get install cifs-utils I need to correct the corruption or restore the original libraries. Note: I ...
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How to resolve the undefined symbol of magic_setparam in /lib64/libmagic.so.1 ?

I have successfully installed the command s3cmd (1.6.1) that I downloaded from the s3tools official web site. So the s3cmd software should be all right, and also the system libmagic.so.l itself is no ...
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206 views

What does a “failed to map segment from shared object” error mean?

Many answers to other questions help resolve an error of the form "failed to map segment from shared object," but they usually have very specific answers that I find difficult to apply to other ...
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644 views

Access dll in linux

Okay so I have a bunch of .dll files that are compiled on windows (though I could recompile them on linux if that was necessary) that I want to use. The final idea I am having is to write a .so ...
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1answer
67 views

Placed library in /usr/lib, but ldconfig doesn't put it in cache

I'm starting a project that requires an external shared library third-party.so. I've placed it in /usr/lib. However, when I run sudo ldconfig -v, it's not listed. ldconfig -p | grep third-party.so ...
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84 views

Linux access windows share without loading to RAM

I have a laptop running an Arch-based Linux system and frequently need to access a windows share at my workplace. This is really annoying since it takes ages to load. Particularly, one folder is ...
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0answers
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cannot find libarary error

I am trying to install a software "W" which requires some non standard packages like "XYZ". I am installing XYZ as instructed in the related site using the following commands ./configure -C make ...
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2answers
4k views

How to link to a shared library with a relative path?

In the man page for ld.so(8), it says that When resolving library dependencies, the dynamic linker first inspects each dependency string to see if it contains a slash (this can occur if a library ...
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890 views

Building shared library which is executable and linkable using Cmake

How to create an executable shared-library using cmake? Something like: libtest.so :: linkable shared library libtest.so :: executable too Note: gcc/g++ options are known to achieve the ...
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2answers
808 views

ldd shows no location after arrow; library does not exist on system

I want to create a chroot environment that has access to hand-picked programs but is completely isolated from the rest of the system. I created three folders in this chroot folder: bin, lib, lib64. I ...
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1answer
117 views

Are the addresses inside a shared library file virtual addresses, or relocatable addresses?

Are the addresses inside a shared library file virtual addresses, or relocatable addresses? Does the answer depend on whether the shared library file was built with GCC’s -fPIC option? Originated ...
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2answers
499 views

What is the difference between Shared object file and Relocatable file?

https://linux-audit.com/elf-binaries-on-linux-understanding-and-analysis/ says The type field tells us what the purpose of the file is. There are a few common file types. CORE (value 4) DYN (...
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1answer
147 views

What kinds of files can be dynamically loaded?

Operating System Concepts, by Silberschatz A., Galvin P. B., Gagne G. - Operating System Concepts, 9th Edition - 2012 says 8.1.4 Dynamic Loading In our discussion so far, it has been necessary ...
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1answer
513 views

What does “unused direct dependencies” mean?

When using the ldd command there is an option, -u, to print unused direct dependencies as stated in the on-line help. For example: ldd -u /bin/gcc Unused direct dependencies: /lib64/...
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1answer
260 views

Why cannot 64-bit shared libraries be used by 32-bit code?

On GNU/Linux, x86/x86-64, in general, what is the reason that (at least sometimes, maybe there are exceptions) 64-bit library code cannot be used by a 32-bit program? I'm aware of many of the ...
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1answer
103 views

Mint 19 - Pidgin IM - Error while launching: libpurple.so.0: cannot open shared object file

System: Linux Mint 19 Cinnamon 64-bit, based on Ubuntu 18.04. Pidgin: Built from source, version 2.13.0. Pidgin would not launch from the GUI, so I tried it from terminal if I can see any error and ...
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1answer
191 views

install different version of GCC side by side

My primary problem is in my Fedora 28, GCC8 is installed. Now, this gives libgfortran.so.5. But many of my applications are not updated and still depends on libgfortran.so.3 So, how can I solve the ...
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Can I programmatically remove funcionality from a shared library that is not used by a specified executable? [closed]

I have a library taking up a lot of disk space. Only one program I use links to that library. I am pretty sure that the program uses only a tiny fraction of the functionality provided by that library. ...
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3answers
1k views

Centos 7, I thought “yum install ___” was supposed to get all the dependencies, too?

I want to install Trillian onto my CentOS 7 box. I went to www.trillian.im/get/linux/6.1/linux.html and downloaded the rpm package trillian-6.1.0.5-1.fc25.x86_64.rpm. It was my understanding that ...
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1answer
2k views

What do the multiple GLIBC versions mean in the output of ldd?

The ldd program reports some missing shared libraries that my shared library needs. (I built it on a different machine with Red Hat Linux 7 and want to run it on another with Red Hat Linux 6.) In the ...
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1answer
795 views

How to ensure that a shared library will have its memory pages shared by several processes?

Let me first describe what I want to do, followed by what I manage to do, and finally my issue. Goal: implementing flush+flush cache attack in C I am trying to implement in C the flush+flush cache ...
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2answers
555 views

Creating a link to a shared library

I have a library ( ZendDebugger.so ) which in turn requires the openssl library but it doesn't find a reference to it. Indeed when ZendDebugger.so loads, it prints this error on the error log ( which ...
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1answer
168 views

Is the shared library object loaded as shared memory for the program?

I was coding some C when I started asking myself about free() inside a shared library and SIGKILL, and so on. Then, after some reading and re-thinking, I came up to this simple question. CONTEXT : ...
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603 views

What differences and relations are between the various `libc.so`?

On Lubntu 18.04 $ whereis libc libc: /usr/lib/x86_64-linux-gnu/libc.a /usr/lib/x86_64-linux-gnu/libc.so /usr/share/man/man7/libc.7.gz $ locate libc.so /lib/i386-linux-gnu/libc.so.6 /lib/x86_64-linux-...
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1answer
494 views

Are there any circumstances in which ld ignores LD_LIBRARY_PATH?

I've just come across a little problem with ld which I just can't explain. Let's say I have compiled a library in my home directory and installed it all under ~/root. The shared library file can be ...
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1answer
521 views

Fix hardcoded dynamic linking for executable

I have an executable file called reg with the following shared library dependencies: [terminal]$ ldd ./reg linux-vdso.so.1 => (0x00007ffc40d90000) libpthread.so.0 => /lib64/libpthread.so.0 (...
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1answer
518 views

Are shared library ABI compatible as long as their versions are the same?

Suppose I have a program compiled that's linked against libc.so.6 on one system (e.g., Ubuntu x64). If I take this binary to another system that has the same libc version 6 (e.g., Fedora x64), it ...
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166 views

Debian MadCoin Install Problem

I have this issue, I try to run ./MadCoin-qt it's wallet and i receive this errror: ./MadCoin-qt: error while loading shared libraries: libminiupnpc.so.8: cannot open shared object file: No such file ...
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2answers
382 views

How to resolve Depends: libwinpr2-2?

When I want to install any package like gedit: sudo apt-get clean sudo apt-get autoclean apt install gedit Output is: You might want to run 'apt --fix-broken install' to correct these. The ...
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1answer
39 views

How to install a shared library when installing to a system path?

I am experimenting with how to distribute a simple graphics library for Linux using a Makefile. The shared library is called libsgtk.so. Here is my first attempt for the Makefile: CFLAGS= -pthread \ ...
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1answer
184 views

Pandoc is missing a library file [closed]

pandoc-citeproc is missing a library file: [max@arch ~]$ pandoc-citeproc pandoc-citeproc: error while loading shared libraries: libHStext-icu-0.7.0.1-qGJENUzIfHIw3gGVnpCOt-ghc8.2.2.so: cannot open ...
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1answer
127 views

Shared library minor version management

I have a simple program called main: #include <iostream> #include "random.h" int main() { std::cout << "The program has started\n"; return get_another_random_number(); } ...
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1answer
3k views

Finding libssl on a customer's Linux

We're using a library which needs to load libssl in a version 1.0.*. It doesn't work with libssl.so.1.1. We need it to work on any Linux system. We try to load various versions and this usually works,...