Switchless mode and sgx-ssl conflict each other?

I am trying to build an app using switchless mode and sgx-ssl.

On my machines (Ubuntu 18.04, sgxsdk 2.5, sgxssl 2.4.1), standalone switchless example and sgx-ssl test-app (found [here](https://github.com/intel/intel-sgx-ssl)) works well, but, when trying to combine these two, I get an _illigal intstruction_ error from `libsgx_urts.so`.

More specifically, after linking sgx-ssl (i.e. `ligsgx_tsgxssl`) and `libsgx_tsetjmp` to an enclave, attempt to initialize and enclave using `sgx_create_enclave_ex()` raises SIGILL.

p.s. I wanted to provide more detailed error report, but I currently don't know how to dump SE_TRACEs ;)

Where can I find documentation for debugging `libsgx_urts.so`?

Start by reproducing the combination of the standalone switchless example and the sgx-ssl test app on the stated Ubuntu 18.04, SGX SDK 2.5, and sgx-ssl 2.4.1 setup. Trace the call to sgx_create_enclave_ex() and the SIGILL from libsgx_urts.so, then determine whether the issue is a compatibility defect or missing debugging documentation.

Written by the indexing model from the issue text.