Notes for octave - reproducible builds result

Version annotated: 4.0.0-3
Identified issues:
Identifier: timestamps_in_pdf_generated_by_latex
URL https://wiki.debian.org/ReproducibleBuilds/TimestampsInPDFGeneratedByLaTeX
Description PDF files generated with pdftex and pdflatex will contain CreationDate and
ModDate set to the current date and time.
Identifier: diffoscope_runs_forever
URL https://reproducible.debian.net/index_breakages.html
Description Some packages cannot be analysed by diffoscope due to it running "forever".
Currently the diffoscope process is killed after 120 minutes.
https://reproducible.debian.net/index_breakages.html collects a list of currently
undiffable packages (as well as other issues with tests.reproducile-builds.org.
Identifier: blacklisted_on_jenkins
Description Some packages have been blacklisted in our test infrastructure because
their build hangs, takes too long, spawns processes that are not killed, or
simply because they use too many resources for our current capacity. (This
is purely practical step - we would like to test these packages.)
Identifier: timestamps_in_qhc
URL https://wiki.debian.org/ReproducibleBuilds/TimestampsInDatabaseGeneratedByQhelpgenerator
Description There has been done a lot of reproducible fixes in 5.5.0, so it is worth to
wait entering this version sid before retrying.
.
qhelpgenerator inserts a timestamp into documentation (qhc) files,
which are sqlite3 databases. The timestamp used now respects
SOURCE_DATE_EPOCH, but is still affected by timezone.
.
https://codesearch.debian.net/search?q=Q_UNLIKELY.*SOURCE_DATE_EPOCH&literal=0
.
sqlite3 databases appear to be reproducible in themselves, but qhelp
generator is using various file IDs which become non-deterministic due to
map access. For example
.
https://sources.debian.net/src/qt4-x11/latest/tools/assistant/lib/qhelpgenerator.cpp/?hl=742#L742
.
I suspect we just need a few sorts (and some time to build qt4-x11...)
.
Also
.
https://sources.debian.org/src/qttools-opensource-src/latest/src/assistant/help/qhelpcollectionhandler.cpp/?hl=1639#L1639
.
debian bug https://bugs.debian.org/875847
.
upstream bug https://bugreports.qt.io/browse/QTBUG-62697
 

Our notes about issues affecting packages are stored in notes.git and are targeted at packages in Debian in 'unstable/amd64' (unless they say otherwise).