Search for trellis in /usr/local/share/trellis if not specified with -DTRELLIS_ROOT
Search for trellis in /usr/local/share/trellis if not specified with -DTRELLIS_ROOT

SymbiFlow/nextpnr,SymbiFlow/nextpnr,SymbiFlow/nextpnr,YosysHQ/nextpnr,YosysHQ/nextpnr,YosysHQ/nextpnr,YosysHQ/nextpnr,SymbiFlow/nextpnr