OpenSSL: Need to add openssl/applink.c to Windows executables using OpenSSL

[obiltschnig]

When building on Windows with OpenSSL, the file applink.c needs to be compiled into the executable.
With CMake this can be done by adding:

target_link_libraries(target PRIVATE OpenSSL::applink)

This is apparent when trying to run the NetSSL test suite on Windows.

[matejk]

Did this issue occur with release 1.14?

We use pre-built OpenSSL 3 with 1.13 and there was no need to link additional file.

Which applink.c has to be used?

Can it be added to git and be used with any pre-compiled OpenSSL?

[obiltschnig]

It's usually included with OpenSSL (in the include/openssl directory). Whether it's actually needed depends apparently on a few things (it's not well documented). This probably includes how OpenSSL was built.

OPENSSL_Applink
https://cmake.org/cmake/help/latest/module/FindOpenSSL.html