9 - sudo add-apt-repository ppa:dns/gnu -y
10 - sudo apt-get update -q
11 - sudo apt-get install --only-upgrade autoconf
14 - export OMP_NUM_THREADS=1
15 - export CFLAGS="-Wno-deprecated-declarations -Wdeclaration-after-statement -Wno-error=unused-variable"
16 - ./configure --disable-openmp --with-quantum-depth=16 --enable-hdri=no --with-perl