[Bug 2093107] Re: debhelper sequencer is doing excessive dpkg-buildflags calls

[Michael Hudson-Doyle]

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=872381 and
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1077005 seem related
(and gosh make is a terrible programming language). I think this
probably affects Ubuntu worse than Debian because we added RUSTFLAGS to
the list of variables to export but it is often empty.

** Bug watch added: Debian Bug tracker #872381
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=872381

** Bug watch added: Debian Bug tracker #1077005
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1077005

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Title:
  debhelper sequencer is doing excessive dpkg-buildflags calls

Status in debhelper package in Ubuntu:
  Incomplete

Bug description:
  debhelper sequencer is doing excessive dpkg-buildflags calls, this is
  seen with the 13.23ubuntu1 merge, but not in Debian.

  with each call into the rules file, there's a visible 2-4 seconds
  delay, while a huge amount of dpkg-buildflags calls are done.

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