[remram]

The ABI doesn't seem to be the problem, and Win32 does not include a libjpeg, so your Win32 approach would only work if it also bundles or statically links libjpeg.

[networked]

> your Win32 approach would only work if it also bundles or statically links libjpeg.

Of course. The stable ABI is to allow your bundled DLLs to keep functioning. (Check out https://news.ycombinator.com/item?id=32471624 for an extensive discussion of the link.)