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I have a 32-bit .so binary-only library and I have to generate 64-bit program that uses it. Is there a way to wrap or convert it, so it can be used with 64-bit program?
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if you want to go back to the 32-bit version of Windows, you'll need to download the media creation tool — the 64-bit one, if you're running the 64-bit version of Windows 10 — and use it to create 32-bit installation media. Boot from that installation media and reinstall the 32-bit version over the 64-bit version.
In short: You can't link a 32-bit app to a 64-bit library. You can run a 32-bit application, using 32-bit shared libraries on a 64-bit OS (at least all the popular 32-/64-bit processors such as AMD, Intel and Sparc). But that doesn't involve any libraries.
To put it in simple words, if you run a 32-bit program on a 64-bit machine, it will work fine, and you won't encounter any problems. Backward compatibility is an important part when it comes to computer technology. Therefore, 64 bit systems can support and run 32-bit applications.
No. You can't directly link to 32bit code inside of a 64bit program.
The best option is to compile a 32bit (standalone) program that can run on your 64bit platform (using ia32), and then use a form of inter-process communication to communicate to it from your 64bit program.
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For an example of using IPC to run 32-bit plugins from 64-bit code, look at the open source NSPluginWrapper.
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