#25483: Windows reproducible build of snowflake
     Reporter:  arlolra               |      Owner:  (none)
         Type:  defect                |     Status:  new
     Priority:  Medium                |  Milestone:
    Component:  - Select a component  |    Version:
     Severity:  Normal                |   Keywords:
Actual Points:                        |  Parent ID:
       Points:                        |   Reviewer:
      Sponsor:                        |
 Breaking this out from
 https://trac.torproject.org/projects/tor/ticket/19001#comment:36, where
 dcf wrote,

 > I pushed some preliminary code for getting started with a windows
 reproducible build.
 >   https://gitweb.torproject.org/user/dcf/tor-browser-bundle.git/log/?h
 > It doesn't work yet; after `./mkbundle-windows.sh versions.alpha`, it
 eventually fails with:
 > {{{
 > + /home/ubuntu/build/webrtc/src/out_bootstrap/gn gen out/Release '--
 args= target_os="win" target_cpu="x86" is_debug=false
 treat_warnings_as_errors=false is_component_build=false is_clang=true
 use_sysroot=false clang_use_chrome_plugins=false
 clang_base_path="/home/ubuntu/build/clang" rtc_include_opus=false
 rtc_include_ilbc=false rtc_include_internal_audio_device=false
 > ERROR at //build/config/BUILDCONFIG.gn:239:3: Assertion failed.
 >   assert(target_os == host_os, "Win cross-compiles only work on win
 >   ^-----
 > Win cross-compiles only work on win hosts.
 > }}}
 > But at this point one can ssh into the build VM and start debugging the
 build failures.

 Some further notes from what we've discovered so far.

 says that we need to add `target_os = ['win']` to our `.gclient` file
 before calling `gclient sync` to get some additional deps.

 says that Googlers have access to the necessary toolchain, but we don't.

 points to a method of creating it from a fresh VM.  Presumably we can use
 https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/ and the
 community version of Visual Studio (steps to reproduce will follow)

Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25483>
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