pto_merge -V (return code: 1)
pto_merge: unrecognized option '--version'
pto_merge --help (return code: 0)
pto_merge: merges several project files
pto_merge version 2017.0.0.eac5e8cc546e
Usage: pto_merge [options] input.pto input2.pto ...
Options:
-o, --output=file.pto Output Hugin PTO file.
Default: <filename>_merge.pto
-h, --help Shows this help