SGX thread_local variable causes link error: undefined reference to `__cxa_thread_atexit'

Hello, I have a linking error inside SGX enclaves when using thread_local variables:
For example:
thread_local MyStruct tl_var { };

Errors:
Enclave/Enclave.o: In function __tls_init:
Enclave.cpp: undefined reference to `__cxa_thread_atexit'

How could I solve this problem please ?

Start with the thread_local example and the linker output for Enclave/Enclave.o and Enclave.cpp. Investigate how the SGX enclave build handles the missing __cxa_thread_atexit symbol and compare the supported C++ thread-local behavior. Done means the enclave links successfully when using the shown thread_local variable.

Written by the indexing model from the issue text.