How to compile Empty Epsilon on Linux

Run the following on Lubuntu 19.10:

#Acquire prerequisites
sudo apt install ninja-build libsfml-dev

mkdir bridge_simulation
cd bridge_simulation
#Acquire code
git clone https://github.com/daid/EmptyEpsilon.git
git clone https://github.com/daid/SeriousProton.git

#Check out correct tag
cd EmptyEpsilon
git checkout EE-2020.04.09
cd ..

#Prepare for out-of-source build
mkdir build
cd build

#Build (read notes below first!)
cmake -GNinja -DCMAKE_BUILD_TYPE=Release -DSERIOUS_PROTON_DIR=../SeriousProton/  -DCPACK_PACKAGE_VERSION_MAJOR=2020 -DCPACK_PACKAGE_VERSION_MINOR=04 -DCPACK_PACKAGE_VERSION_PATCH=09 ../EmptyEpsilon/
ninja

#Navigate to EmptyEpislon directory so executable can find resources
cd ../EmptyEpsilon/
../build/EmptyEpsilon

For better performance, consider modifying EmptyEpsilon/CMakeLists.txt from (line 37):

set(OPTIMIZER_FLAGS ${OPTIMIZER_FLAGS} -O3 -flto -funsafe-math-optimizations)

to

set(OPTIMIZER_FLAGS ${OPTIMIZER_FLAGS} -O3 -flto -funsafe-math-optimizations -march=native)

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