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I have a binary file in linux. How can I check whether it has been compiled with "-static" or not?
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file source code /* * Look through the program headers of an executable image, searching * for a PT_INTERP section; if one is found, it's dynamically linked, * otherwise it's statically linked.
nm <exe filename> shows the symbols in the file. To see which symbols come from static libraries requires running nm against those libraries to get a list of the symbols (functions, etc.) in them, then comparing them to what your list of symbols from nm <exe filename> . You compare lists with the comm command.
Static libraries, while reusable in multiple programs, are locked into a program at compile time. Dynamic, or shared libraries, on the other hand, exist as separate files outside of the executable file.
Static linking is the result of the linker copying all library routines used in the program into the executable image. This may require more disk space and memory than dynamic linking, but is both faster and more portable, since it does not require the presence of the library on the system where it is run.
ldd /path/to/binary should not list any shared libraries if the binary is statically compiled.
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You can also use the file command (and objdump could also be useful).
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