[tor-bugs] #28238 [Applications/Tor Browser]: Use mingw-w64/clang toolchain to build Firefox

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#28238: Use mingw-w64/clang toolchain to build Firefox
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-rbm, GeorgKoppen201901,          |  Actual Points:
  TorBrowserTeam201901                           |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by gk):

 So, I have been fighting today with building the whole Firefox related
 part (including `fxc2`) without the old mingw-w64/gcc-based toolchain.
 `fxc2` does not want and I don't know why yet. It fails to run with things
 like
 {{{
  0:03.01 err:module:import_dll Library api-ms-win-crt-convert-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.01 err:module:import_dll Library api-ms-win-crt-heap-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.01 err:module:import_dll Library api-ms-win-crt-private-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.01 err:module:import_dll Library api-ms-win-crt-runtime-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.01 err:module:import_dll Library api-ms-win-crt-stdio-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.02 err:module:import_dll Library api-ms-win-crt-string-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.02 err:module:import_dll Library api-ms-win-crt-
 environment-l1-1-0.dll (which is needed by
 L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.02 err:module:import_dll Library api-ms-win-crt-math-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.02 err:module:import_dll Library api-ms-win-crt-time-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.03 err:module:import_dll Library api-ms-win-crt-locale-l1-1-0.dll
 (which is needed by L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe") not found
  0:03.03 err:module:LdrInitializeThunk Main exe initialization for
 L"Z:\\var\\tmp\\dist\\fxc2\\bin\\fxc2.exe" failed, status c0000135
 }}}
 I need to look closer at the way this is built on Mozilla infra tomorrow
 where this seems to be working.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28238#comment:12>
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