shared-libraries

I use LD_LIBRARY_PATH to set the path of a certain user library for an application. But if I set capabilities on this application sudo setcap CAP_NET_BIND_SERVICE=eip myapplication then LD_LIBRARY_PATH seems to be ignored. When I launch the program, Linux complains that it cannot find a certain shared library. I guess that there's some kind of protection kicking in, to prevent applications with extended rights from being hijacked. Is there a workaround? As already stated in other answers, this behavior is intended. There is some kind of workaround if you can compile (or at least link) the

Let's say we got a main executable called "my_app" and it uses several other libraries: 3 libraries are linked statically, and other 3 are linked dynamically. In which order should they be linked against "my_app"? But in which order should these be linked? Let's say we got libSA (as in Static A) which depends on libSB, and libSC which depends on libSB: libSA -> libSB -> libSC and three dynamic libraries: libDA -> libDB -> libDC ( libDA is the basic, libDC is the highest) in which order should these be linked? the basic one first or last? g++ ... -g libSA libSB libSC -lDA -lDB -lDC -o my_app

I have a shared library that I implemented and want the .so to call a function that's implemented in the main program which loads the library. Let's say I have main.c (executable) which contains: void inmain_function(void*); dlopen("libmy.so"); In the my.c (the code for the libmy.so) I want to call inmain_function : inmain_function(NULL); How can the shared library call inmain_function regardless the fact inmain_function is defined in the main program. Note: I want to call a symbol in main.c from my.c not vice versa which is the common usage. You'll need make a register function in your .so so

I downloaded this: https://github.com/mongodb/mongo-c-driver And now I'm trying to use it inside my C program, but I don't know what to do with the generated .a files. What are they? I couldn't find any information, not even in the GCC manual. And I built it like so: scons --c99 Also, can I use C99 libraries with my C89 program? .a files are static libraries typically generated by the archive tool . You usually include the header files associated with that static library and then link to the library when you are compiling. Sriram .a files are created with the ar utility, and they are libraries

Is /usr/local/lib searched for shared libraries ? I have this error: [Leo@chessman ~]$ whereis ffmpeg ffmpeg: /usr/local/bin/ffmpeg [Leo@chessman ~]$ ffmpeg ffmpeg: error while loading shared libraries: libavcore.so.0: cannot open shared object file: No such file or directory [Leo@chessman ~]$ ls /usr/local/lib/libav* /usr/local/lib/libavcodec.a /usr/local/lib/libavfilter.a /usr/local/lib/libavcodec.so /usr/local/lib/libavfilter.so /usr/local/lib/libavcodec.so.52 /usr/local/lib/libavfilter.so.1 /usr/local/lib/libavcodec.so.52.108.0 /usr/local/lib/libavfilter.so.1.74.0 /usr/local/lib/libavcore