[tor-bugs] #12113 [Tor bundles/installation]: Building libgevent/opensll on Windows without exception handling would reduce dependencies (was: Building libgmp on Windows without exception handling would reduce dependencies)

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#12113: Building libgevent/opensll on Windows without exception handling would
reduce dependencies
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     Reporter:  tom                       |      Owner:  erinn
         Type:  defect                    |     Status:  new
     Priority:  minor                     |  Milestone:
    Component:  Tor bundles/installation  |    Version:
   Resolution:                            |   Keywords:  tbb-gitian
Actual Points:                            |  Parent ID:
       Points:                            |
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Changes (by gk):

 * keywords:  needs-triage => tbb-gitian


Old description:

> I believe that in the Tor Browser Bundle on Windows, for the tor.exe
> component, libgmpxx-4.dll is built using MinGW with exception handling
> enabled. (Omits -fno-exceptions).  MinGW has an archaic exception
> handling mechanism on Windows, using setjmp/longjmp based exceptions and
> necessitates the extra dll libgcc_s_sjlj-1.dll.
>
> If libgmp was build without exception handling (it appears to only use it
> 3 or 4 places in the dll), it'd be possible to eliminate
> libgcc_s_sjlj-1.dll entirely.

New description:

 I believe that in the Tor Browser Bundle on Windows, for the tor.exe
 component, libgmpxx-4.dll is built using MinGW with exception handling
 enabled. (Omits -fno-exceptions).  MinGW has an archaic exception handling
 mechanism on Windows, using setjmp/longjmp based exceptions and
 necessitates the extra dll libgcc_s_sjlj-1.dll.

 If libgmp was build without exception handling (it appears to only use it
 3 or 4 places in the dll), it'd be possible to eliminate
 libgcc_s_sjlj-1.dll entirely.

 EDIT: This is not about libgmp anymore as we don't ship the libgmpxx any
 longer. Rather, libevent/openssl are affected by that problem, too.

--

Comment:

 We are not shipping libgmpxx-4.dll anymore beginning with 4.5-alpha-2.
 Thus, this particular problem is solved. But it seems libevent/openssl are
 affected, too.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12113#comment:6>
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