Bug#1091537: debian-installer: make takes huge amount of time to show targets

[Kentaro HAYASHI <kenhys@xdump.org>]

Source: debian-installer
Severity: normal
Tags: d-i
X-Debbugs-Cc: kenhys@xdump.org, kibi@debian.org

Dear Maintainer,

* What led up to the situation?

  According to README [1], to know a list of available targets,
  need to execute "make", but it takes huge amount of times.

* What exactly did you do (or not do) that was effective (or
  ineffective)?

  Follow instruction in README [2] in advance, then execute make.

  $ time make

  ...(omit list of available targets)...
  
  real    12m55.928s
  user    10m15.047s
  sys     2m44.828s

  (on 4vCPU, 16GB memory)

  d-i/installer revision:
  9f06d60d3 sh4: Don't unversion the kernel as multiple flavors are
  supported

* What was the outcome of this action?

  make returns a list of available targets (expected).
  It is expected and result is fine, but it is not expected that it
  takes over 10 minutes.

* What outcome did you expect instead?

  make returns a list of available targets in less times.

  If I'm missing something prerequisite, feedback is welcome.

Regards,

[1] https://salsa.debian.org/installer-team/debian-taller/-/blob/master/build/README
[2] https://salsa.debian.org/installer-team/d-i/-/blob/master/README