I compiled Intel TBB from source using GCC. It generates a libtbb.so and littbb.so.2. Looks like the .so.2 file is the real shared library, libtbb.so just contains a line of text INPUT (libtbb.so.2) What is the purpose to generate these two files instead of one? For the INPUT (libtbb.so.2), what is the syntax…
Tag: shared-libraries
How can I link to an older version of a shared library
I’m building my program on my computer, on which libtiff.so -> libtiff.so.5. And then pushing the builds on another machine on which libtiff.so -> libtiff.so.4. At runtime, my program exists : « error while loading shared libraries: libtiff.so.5: cannot open shared object file: No such file or dir…
How to know the given shared library is built with debug symbols or not?
I have some compiled libraries i.e. shared library (*.so) on x86 Linux and I want to quickly determine whether they were compiled with debugging symbols (i.e with -g/debug option) or not. How to check it? Answer You can use the file command to see if a file is stripped. Basically, this means that the debuggin…
Does using linux capabilities disable LD_PRELOAD
In my custom environment an interceptor library is preloaded which runs a special implementation of bind(), connect(), etc. calls. The problem I see is whenever an application is explicitly enabled capabilities using command setcap, executing the application fails to preload interceptor library and calls defa…
Sqlite libsqlite3.so.0 Not Found
I’m trying to get sqlite3 to work on ubuntu linux. I first tried to download sqlite3 but was given an error about multiple versions. I then deleted libsqlite3.so.0 and another counterpart to that using gksudo natalie, which was recommended. I then reinstalled the two rpm files…I now have eight of …
Build .so file from .c file using gcc command line
I’m trying to create a hello world project for Linux dynamic libraries (.so files). So I have a file hello.c: How do I create a .so file that exports hello(), using gcc from the command line? Answer To generate a shared library you need first to compile your C code with the -fPIC (position independent c…
g++ custom dynamic library linking error undefined symbol
Ok, I’m looking for a solution for 2 days now. I didn’t find anything to solve my problems. What is currently going on? So, I tried creating a dynamic library (.so) on Linux Mint Maya 13 with g++. foolib.h: foolib.cpp: main.cpp: I compiled these files with these instructions: libfoo.so: foo: Creat…
How to recover after deleting the symbolic link libc.so.6?
In our server the symbolic link to libc.so.6 has been deleted. Now none of the binaries in the system work. To fix this, I tried: which, as expected, gives me: I also tried: with the same result. Further unsuccessful attempts include cp, mv, cat. I’m connected via ssh and I believe I will not be able to…
How to install the program depending on libstdc++ library
My program is written in C++, using GCC on Ubuntu 9.10 64 bit. If depends on /usr/lib64/libstdc++.so.6 which actually points to /usr/lib64/libstdc++.so.6.0.13. Now I copy this program to virgin Ubuntu 7.04 system and try to run it. It doesn’t run, as expected. Then I add to the program directory the fol…
What is the difference between LD_LIBRARY_PATH and -L at link time?
I’m having problems with LD_LIBRARY_PATH at link time (this question has nothing to do with run time). The link line looks like this when I run make (this is a Linux system using g++ version 4.1.x): The -l options reference shared libraries (e.g., libabc.so) which exist in the directories specified by t…