ld.so assertion failure when using raw-dylib on Linux

I tried the raw-dylib feature in https://github.com/fortanix/rust-sgx/pull/804 but unfortunately I couldn't get it to work. I'm getting this error when doing cargo run -p fortanix-sgx-tools --bin ftxsgx-runner.

Inconsistency detected by ld.so: rtld.c: 2013: dl_main: Assertion `GL(dl_rtld_map).l_prev->l_next == GL(dl_rtld_map).l_next' failed!

This is on Ubuntu 24.04 with libc 2.39-0ubuntu8.5. rustc 1.89.0-nightly (d4e1159b8 2025-06-21).

There are no major differences in objdump -P (just the ordering of DT_NEEDED entries is different, but I don't think that should matter?). There is a small difference in objdump -T:

--- objdump-T.fake-vdso
+++ objdump-T.raw-dylib
-0000000000000000  w   DF *UND*	0000000000000000  Base        __vdso_sgx_enter_enclave
+0000000000000000  w   D  *UND*	0000000000000000  Base        __vdso_sgx_enter_enclave

I don't know that this is related to the assertion failure, but it's a bit surprising to me the F flag isn't getting set using the new method. I'm using extern { fn ... } in addition to using .type ..., function in assembly.

Reproduce with cargo run -p fortanix-sgx-tools --bin ftxsgx-runner on Ubuntu 24.04 using the reported nightly, then inspect the generated artifacts with objdump -P and objdump -T. Compare the fake-vDSO and raw-dylib cases, including DT_NEEDED ordering, symbol flags, the extern declaration, and the assembly .type directive. Done means identifying the cause of the ld.so assertion and validating a specific correction.