Can you statically link a shared library?

You can’t statically link a shared library (or dynamically link a static one). The flag -static will force the linker to use static libraries (. a) instead of shared (. so) ones.

Either compile using -fPic (necessary on everything but Windows) in order to create position-independent code which will allow linking the static libraries into a single shared library or decompress all static libraries (e.g. using ar ) and re-link them into a shared library (which I think is an inelegant & non- …

What is the difference between static library and shared library?

They are usually faster than the shared libraries because a set of commonly used object files is put into a single library executable file. One can build multiple executables without the need to recompile the file.

Shared Libraries :

properties Static library Shared library
Means Performed by linkers Performed by operating System

Static libraries increase the overall size of the binary, but it means that you don’t need to carry along a copy of the library that is being used. As the code is connected at compile time there are not any additional run-time loading costs. The code is simply there.

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6 Answers. Static libraries do not link with other static libraries. The only way to do this is to use your librarian/archiver tool (for example ar on Linux) to create a single new static library by concatenating the multiple libraries.

Linking libraries to executables with CMake

Let’s start by adding the library’s directory as a subdirectory to our myapp project. add_subdirectory makes the library test defined in libtestproject available to the build. In target_link_libraries we tell CMake to link it to our executable.

How does CMake find libraries?

cmake, which is the typical way for finding libraries. First CMake checks all directories in ${CMAKE_MODULE_PATH}, then it looks in its own module directory <CMAKE_ROOT>/share/cmake-x.y/Modules/. If no such file is found, it looks for Config. cmake or -config.

What is the advantage of using static library?

Another benefit of using static libraries is execution speed at run-time. Because the it’s object code (binary) is already included in the executable file, multiple calls to functions can be handled much more quickly than a dynamic library’s code, which needs to be called from files outside of the executable.

What shared library means?

Shared libraries are libraries that are loaded by programs when they start. When a shared library is installed properly, all programs that start afterwards automatically use the new shared library. … override specific libraries or even specific functions in a library when executing a particular program.

How do shared libraries work?

Simply put, A shared library/ Dynamic Library is a library that is loaded dynamically at runtime for each application that requires it. … They load only a single copy of the library file in memory when you run a program, so a lot of memory is saved when you start running multiple programs using that library.

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Static linking increases the file size of your program, and it may increase the code size in memory if other applications, or other copies of your application, are running on the system. This option forces the linker to place the library procedures your program references into the program’s object file.

How do dynamically linked libraries work?

Dynamic libraries are archives of binary code that are not physically linked into an executable file. The libraries are physically loaded into the computer’s memory instead and during the linking stage of compilation, only the address in the memory of the library function is added in the final executable file.