We're running into a linker error problem when we try to incorporate the [mio-sgx](https://github.com/mesalock-linux/mio-sgx) library into our enclave. It seems like the `u_pipe2_ocall` symbol is missing, which, if I looked that up correctly, is provided by the [sgx_ustdc](https://github.com/apache/incubator-teaclave-sgx-sdk/blob/ed9e7cce4fd40efd7a256d5c4be1c5f00778a5bb/sgx_ustdc/pipe.c#L33) library?
However, in the [mio samplecode](https://github.com/apache/incubator-teaclave-sgx-sdk/tree/master/samplecode/mio/server) I cannot find any reference to `sgx_ustdc`, neither in the Makefile (where I'd expect it, since it's a C-Library?) nor in any Cargo.toml. So I don't quite understand what's going on and how the symbols of that library find their way into `sgx_libc`. Any help is appreciated 😄 The error reported by the compiler: ``` /usr/local/bin/ld: ./lib/libenclave.a(sgx_libc-fe3717fe13cfb6f5.sgx_libc.2dl1tomz-cgu.6.rcgu.o): in function `sgx_libc::linux::x86_64::ocall::pipe2': sgx_libc.2dl1tomz-cgu.6:(.text._ZN8sgx_libc5linux6x86_645ocall5pipe217hc10c647a6c5db8d3E+0x26): undefined reference to `u_pipe2_ocall' collect2: error: ld returned 1 exit status Makefile:190: recipe for target 'enclave/enclave.so' failed ``` SGX dependency section of the enclave `cargo.toml`: ``` [target.'cfg(not(target_env = "sgx"))'.dependencies] sgx_tse = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } sgx_tstd = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git";, features = ["untrusted_fs","net","backtrace"] } sgx_rand = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } sgx_trts = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } sgx_types = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } sgx_tseal = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } sgx_tcrypto = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } sgx_serialize = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } sgx_tunittest = { rev = "v1.1.3", git = "https://github.com/apache/teaclave-sgx-sdk.git"; } ``` Further down, we add the `mio` dependency: ``` [dependencies.mio] git = "https://github.com/mesalock-linux/mio-sgx"; rev = "sgx_1.1.3" ``` -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/apache/incubator-teaclave-sgx-sdk/issues/342
