Compile generate shared object files in ubuntu

Question

I want to get the shared object file(.so) by compiling

https://github.com/lucasjones/cpuminer-multi

I used below commands, which generates a couple of .O files.

/autogen.sh 

./configure --prefix=$HOME/Downloads

make

Could you help me to generate .so files? I want to use this files in a couple of different platforms like Android, Ubuntu.

Given the recent bitcoin crash (december 2017), it might be *too late* to consider mining them for profit. — Basile Starynkevitch, Dec 26 '17 at 10:47
@BasileStarynkevitch its ok. I just wanted to try it for my learning purposes. Could you help me to create .so files, so that I could run it on android? — Sachin Singh, Dec 26 '17 at 11:10
My answer contains several references to help you. I can't help more (don't have time to repeat what I have referenced). — Basile Starynkevitch, Dec 26 '17 at 11:22

Basile Starynkevitch · Answer 1 · 2017-12-26T10:55:18.307

Notice that ELF shared objects should, in practice, contain position-independent code (PIC). See Drepper's How to Write Shared Libraries paper and this answer. Simple build instructions for shared libraries are here and there.

In your cpuminer-multi repository, there are some assembler files, e.g. aesb-x64.S ..... So you need at least to check that the assembler code inside them is PIC (or to patch these files to make them PIC).

Could you help me to generate .so files? I want to use this files in a couple of different platforms

This might not work, since the ABI and API (e.g. of common or standard libraries) could be slightly different. I would recommend a different build for each platform.

./configure --prefix=$HOME/Downloads

This looks strange (and smells bad). Read more about autoconf. The --prefix relates to installation subdirectories, not to the build tree. I would recommend --prefix=$HOME/soft/ then adding $HOME/soft/bin/ to your PATH variable.

Compile generate shared object files in ubuntu

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