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How dynamic linking works?
In computing, a dynamic linker is the part of an operating system that loads and links the shared libraries needed by an executable when it is executed (at “run time”), by copying the content of libraries from persistent storage to RAM, filling jump tables and relocating pointers.
How does dynamic linking work on Linux?
When dynamic linking is needed, the kernel bootstraps the dynamic linker (ELF interpreter), which initializes itself, and then loads the specified shared objects (unless already loaded). It then performs the necessary relocations, including the shared objects that the target shared object uses.
What is the difference between dynamic linking and dynamic loading?
Dynamic loading means loading the library (or any other binary for that matter) into the memory during load or run-time. Dynamic linking refers to the linking that is done during load or run-time and not when the exe is created. In case of dynamic linking the linker while creating the exe does minimal work.
Why can a program run with a dynamic library not found?
Because something starts that program by pointing the linker to the directory containing that library. Usually this is done my setting the environment variable LD_LIBRARY_PATH. For example: The runtime linker will now also look in /look/here/for/libs to find libraries program depends on.
How can I tell if I’m linking to a static…?
By default on Linux/Windows, the underlying linker will attempt dynamic linking, so you don’t have to do full-name linking, if you wanted to link to the shared object.– wklNov 25 ’10 at 23:14 Add a comment | 2 Answers 2
How does the GCC Linker work in Linux?
By default, how gcc links is platform dependent. gcc passes on options to an underlying linker (generally GNU ld on Linux systems, but could be something else on other platforms, like link.exe on Windows, and Sun ld on Solaris), and the linker does its work.