gareth-nx

Cmake, optimization and README.md

6

### Description README.md instructs users to control compiler flags in CMake builds like this (e.g. to get "-O3"): ``` export FFLAGS="-O3" cmake -B build -G Ninja -DCMAKE_MAXIMUM_RANK:String=7 -DCMAKE_INSTALL_PREFIX=$HOME/.local ``` However...