Illegal CPU instructions when testing GDAL.jl?

Too bad it seems to be hard to get this working. I’m not sure, but looking at the error you shared:

_ZNK5osgeo4proj2io21IPROJStringExportable18exportToPROJStringB5cxx11EPNS1_19PROJStringFormatterE at /home/c/.julia-usr/lib/libproj.so (unknown line)
proj_create_conversion at /home/c/.julia-usr/lib/libproj.so (unknown line)
_ZN19OGRSpatialReference9SetProjCSEPKc at /home/c/.julia-usr/lib/libgdal.so (unknown line)

My first guess was a mismatching CXX string ABI, that could still be something to try, see also Error in building julia.