[tor-bugs] #25483 [- Select a component]: Windows reproducible build of snowflake

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#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
 =snowflake-windows&id=0f48dc9e1904fa0643576fc8dcf3db50a4d2f959
 >
 > 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
 rtc_include_tests=true'
 > ERROR at //build/config/BUILDCONFIG.gn:239:3: Assertion failed.
 >   assert(target_os == host_os, "Win cross-compiles only work on win
 hosts.")
 >   ^-----
 > 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.

 *
 https://chromium.googlesource.com/chromium/src/+/master/docs/win_cross.md
 says that we need to add `target_os = ['win']` to our `.gclient` file
 before calling `gclient sync` to get some additional deps.

 *
 https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/master/win_toolchain/README.md
 says that Googlers have access to the necessary toolchain, but we don't.

 *
 https://chromium.googlesource.com/chromium/tools/depot_tools.git/+/master/win_toolchain/package_from_installed.py
 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>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

_______________________________________________
tor-bugs mailing list
tor-bugs@xxxxxxxxxxxxxxxxxxxx
https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-bugs