[tor-bugs] #23846 [Core Tor/Tor]: Use libtool for building shared library

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#23846: Use libtool for building shared library
-------------------------------------------------+-------------------------
 Reporter:  hellais                              |          Owner:  sbs
     Type:  enhancement                          |         Status:
                                                 |  needs_information
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-mobile, s8-api,                  |  Actual Points:
  034-triage-20180328, 034-included-20180402,    |
  034-roadmap-subtask, 035-roadmap-subtask, 035  |
  -triaged-in-20180711                           |
Parent ID:  #25510                               |         Points:
 Reviewer:  ahf                                  |        Sponsor:
                                                 |  Sponsor8
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Comment (by sbs):

 Addition: as far as I can tell, there is no portable way to make a single
 static library out of many static libraries. I remember discussing this
 with `ahf` and concluding that probably using `libtool` was a good
 solution. It is a also a bit of a bummer that what we need `libtool` for
 is to assemble the static library from the many other libraries produced
 by the build system. I think I initially considered making another diff
 that modified the build system to make a single static library, but then I
 started wondering about `rust` integration and then suddenly a `libool`
 rule for assembling a single static library from rust static libraries and
 the many `tor` folders was not that bad. Still I am unhappy of `libtool`
 because it makes the build slower (even with `--disable-shared` on by
 default IIRC it was a bit slower).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23846#comment:38>
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