Copysgx_encalve_common.h from the SGX SDK's include directory to the SampleCommonLoader's include directory: $cp <SGXSDK>/include/sgx_enclave_common.h <SGXSDK>/SampleCode/SampleCommonLoader/Include/
Install the libsgx_enclave_common library: $sudo apt-get install libsgx-enclave-common
If /usr/lib/x86_64-linux-gnu/libsgx_enclave_common.so does not exist, run: $ sudo ln -s /usr/lib/x86_64-linux-gnu/libsgx_enclave_common.so.1 /usr/lib/x86_64-linux-gnu/libsgx_enclave_common.so