Hi, by the narrow margin of one vote, the proposal "set_to_mtime" wins. Committed as http://libburnia-project.org/changeset/5757
man 1 xorrisofs of the next release will state: SOURCE_DATE_EPOCH belongs to the specs of reproducible-builds.org. It is supposed to be either undefined or to contain a decimal number which tells the seconds since january 1st 1970. If it contains a number, then it is used as time value to set the default of --modification-date= and --gpt_disk_guid. The default of --set_all_file_dates is then "set_to_mtime". Startup files and program options can override the effect of SOURCE_DATE_EPOCH. This refers to the description of two new options: --gpt_disk_guid value Control whether an emerging GPT shall get a randomly generated disk GUID or whether the GUID is supplied by the user. Value "random" is default. Value "modification-date" produces a low quality GUID from the value set by option --modification-date=. [...] --set_all_file_dates timestring [...] If the timestring is "set_to_mtime", then the atime and ctime of each file and directory get set to the value found in their mtime. [...] I am now beginning final regression tests for the release of xorriso-1.4.6. Have a nice day :) Thomas