gnmanalyse --version (return code: 0)
GDAL 2.2.1, released 2017/06/23
gnmanalyse --help (return code: 1)
Usage: gnmanalyse [--help][-q][-quiet][--long-usage]
[dijkstra start_gfid end_gfid [[-alo NAME=VALUE] ...]]
[kpaths start_gfid end_gfid k [[-alo NAME=VALUE] ...]]
[resource [[-alo NAME=VALUE] ...]]
[-ds ds_name][-f ds_format][-l layer_name]
[[-dsco NAME=VALUE] ...][-lco NAME=VALUE]
gnm_name
Note: gnmanalyse --long-usage for full help.