| Message ID | 1479460224-6119-16-git-send-email-jezz@sysmic.org |
|---|---|
| State | Superseded |
| Headers | show |
On 18-11-16 10:10, Jérôme Pouiller wrote: > Signed-off-by: Jérôme Pouiller <jezz@sysmic.org> > --- > Config.in | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/Config.in b/Config.in > index 5cf0c4d..2a81202 100644 > --- a/Config.in > +++ b/Config.in > @@ -707,6 +707,11 @@ config BR2_REPRODUCIBLE > this allows to generate exactly identical binaries from one > build to the other, including on different machines. > > + Some restrictions are known on current implementation: > + - Build paths ($OUTDIR and $TOPDIR) have to be the sames for all > + builds > + - Use of lzop is incompatible I don't think it makes sense to document the lzop part. For example, I doubt any of the filesystems except for tar and maybe squashfs are reproducible at the moment (they probably put things in filesystem order). The lzop thing is really a small aspect compared to that. So I think we should just document the restriction that it has to be the same output directory: The current implementation is restricted to builds with the same output directory. Many (absolute) paths are recorded in intermediary files, and it is very likely that some of these paths leak into the target rootfs. If you build with the same O=... path, however, the result is identical. (I'm not 100% satisfied with this explanation but it's a start.) Regards, Arnout > + > This is labeled as an experimental feature, as not all > packages behave properly to ensure reproducibility. > >
diff --git a/Config.in b/Config.in index 5cf0c4d..2a81202 100644 --- a/Config.in +++ b/Config.in @@ -707,6 +707,11 @@ config BR2_REPRODUCIBLE this allows to generate exactly identical binaries from one build to the other, including on different machines. + Some restrictions are known on current implementation: + - Build paths ($OUTDIR and $TOPDIR) have to be the sames for all + builds + - Use of lzop is incompatible + This is labeled as an experimental feature, as not all packages behave properly to ensure reproducibility.
Signed-off-by: Jérôme Pouiller <jezz@sysmic.org> --- Config.in | 5 +++++ 1 file changed, 5 insertions(+)