Building

Main instructions for building SGX-LKL can be found in the README.

Building SGX-LKL on CentOS 7

Ensure you install all the packages listed in the prerequisites section where possible.

CentOS comes with old versions of protobuf and protobuf-c (v2.5), but SGX-LKL requires protobuf >=2.6, so we need to update protobuf manaually:

wget https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gz
tar xvf protobuf-2.6.1.tar.gz
cd protobuf-2.6.1
./configure                                                              
make                                                                     
make check                                                                
make install

and protobuf-c:

wget https://github.com/protobuf-c/protobuf-c/releases/download/v1.2.1/protobuf-c-1.2.1.tar.gz
tar xvf protobuf-c-1.2.1.tar.gz
cd protobuf-c-1.2.1
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig   // specify the location of protobuf.pc file
./configure
make
make install

We need to specify the library path of protobuf:

export LD_LIBRARY_PATH=/usr/local/lib:${LD_LIBRARY_PATH}

Then we need to reinstall the SGX driver from source code. Please follow the Intel's document to complete this step. (https://github.com/01org/linux-sgx-driver)

Next, we need to install the updated development tools. The following command will install GCC version that greather than 5.4

yum install centos-release-scl
yum install devtoolset-7 devtoolset-7-gcc devtoolset-7-gcc-c++ bison flex

We can now switch to the new gcc with:

scl enable devtoolset-7 bash

Now, we can build the SGX-LKL as described in the README.