Hi Mono folks-- some good discussion has come up on the xamarin bugtracker about being able to make builds using the mono toolchain reproducible:
https://bugzilla.xamarin.com/show_bug.cgi?id=26842 Jo Shields offered a one-liner fix to PEWriter.cs to allow the use of an environment variable to fix the timestamp epoch, but made it clear that more feedback is needed, so i'm raising it here: from: public DWORD TimeDateStamp = (uint)(DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalSeconds; to: public DWORD TimeDateStamp = Environment.GetEnvironmentVariable("IKVM_WRITER_TIMESTAMP_EPOCH") != null ? uint.Parse(Environment.GetEnvironmentVariable("IKVM_WRITER_TIMESTAMP_EPOCH")) : (uint)(DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalSeconds; (i'm not sure whether the integer number of seconds is the best form for the environment variable, or whether it would be better to parse a standard date string -- from debian's perspective, we can deal with either, of course) And this still doesn't solve the secondary issue of the assembly GUID, as Jo noted. Any thoughts about how to best enable binary-reproducible builds from the mono toolchain if the invoker requests them? Regards, --dkg
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