Failed to build about wolfssl-examples

[gmatesunny]

Update 1:
I added the following line to both sgx_u.mk and sgx_t.mk at the top
SGX_SDK ?= /opt/intel/sgxsdk
SGX_MODE ?= SIM
SGX_ARCH ?= x64

Then I try to build it like this but it fails, what is wrong I am doing.

roshan@bolt:~/wolfssl/wolfssl-examples/SGX_Linux$ make SGX_MODE=SIM SGX_PRERELEASE=0 SGX_WOLFSSL_LIB=/home/roshan/wolfssl/IDE/LINUX-SGX/ WOLFSSL_ROOT=/home/roshan/wolfssl/wolfssl SGX_DEBUG=0
make -ef sgx_u.mk all
make[1]: Entering directory '/home/roshan/wolfssl/wolfssl-examples/SGX_Linux'
GEN  =>  untrusted/Wolfssl_Enclave_u.c
cc -m64 -O2 -fPIC -Wno-attributes -IInclude -I/home/roshan/wolfssl/wolfssl/ -I/home/roshan/wolfssl/wolfssl/wolfcrypt/ -Iuntrusted -I/opt/intel/sgxsdk/include -DWOLFSSL_SGX -DNDEBUG -UEDEBUG -UDEBUG -c untrusted/Wolfssl_Enclave_u.c -o untrusted/Wolfssl_Enclave_u.o
In file included from untrusted/Wolfssl_Enclave_u.c:1:0:
untrusted/Wolfssl_Enclave_u.h:13:33: fatal error: wolfcrypt/test/test.h: No such file or directory
compilation terminated.
sgx_u.mk:126: recipe for target 'untrusted/Wolfssl_Enclave_u.o' failed
make[1]: *** [untrusted/Wolfssl_Enclave_u.o] Error 1
make[1]: Leaving directory '/home/roshan/wolfssl/wolfssl-examples/SGX_Linux'
Makefile:13: recipe for target 'all' failed
make: *** [all] Error 2

I am on ubuntu 16.04, I resolved the build problem.