gdaltransform --version (return code: 0)
GDAL 2.2.1, released 2017/06/23
gdaltransform --help (return code: 1)
Usage: gdaltransform [--help-general]
[-i] [-s_srs srs_def] [-t_srs srs_def] [-to "NAME=VALUE"]
[-order n] [-tps] [-rpc] [-geoloc]
[-gcp pixel line easting northing [elevation]]* [-output_xy]
[srcfile [dstfile]]