[tor-bugs] #18490 [Tor]: unit-test fail to cross-compile for aarch64

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#18490: unit-test fail to cross-compile for aarch64
--------------------------------+------------------------------
 Reporter:  wbx                 |          Owner:  cypherpunks
     Type:  defect              |         Status:  needs_review
 Priority:  Medium              |      Milestone:
Component:  Tor                 |        Version:  Tor: 0.2.7.6
 Severity:  Normal              |     Resolution:
 Keywords:  unit tests aarch64  |  Actual Points:
Parent ID:                      |         Points:
  Sponsor:                      |
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Changes (by cypherpunks):

 * status:  assigned => needs_review


Comment:

 I was able to reproduce the issue by configuring with `CFLAGS="-O2
 -flto"`. The attached patch fixed the issue for me. @wbx can you verify
 this?

 As mentioned in the commit message, removing the non-testing library from
 the test binary dependencies caused undefined reference errors which were
 caused by missing dependencies. I have added the dependencies that the
 compiler complained about but i am not 100% sure i got them all because of
 the optional external dependencies that tor has. For instance, during
 testing i had to add sandbox.c for one machine because it had sandboxing
 capabilities while another machine did not (yay for conditional
 compilation).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18490#comment:3>
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