If you simply want to run Graphene without rebuilding the host kernel, try the following steps:
** Note: Please use GCC version 4 or 5 **
cd Pal/src
make
cd Pal/ipc/linux
make
sudo ./load.sh
cd LibOS
make SGX=1
cd LibOS/shim/test/native
make
./pal_loader helloworld
cd LibOS/shim/test/apps/lmbench
make
cd lmbench-2.5/bin/linux
./pal_loader lat_syscall null
./pal_loader lat_syscall open
./pal_loader lat_syscall read
./pal_loader lat_proc fork