Build issue with M76 version of webrtc on Windows

[John Curley]

I grabbed the "depot tools" from 2/12/2020. I have followed all of the WebRTC development steps. When I try to build a 64-bit release version of webrtc, I get the following error message. It is my assumption that all of the python stuff should be handled by "depot tools". Any ideas will be greatly appreciated.

 C:\Work\External\webrtc\webrtc-checkout\src>gn gen out/relaudio --args="is_debug=false target_winuwp_version=\"8.1\" target_cpu=\"x64\" target_winuwp_family=\"desktop\" use_rtti=true is_clang=false rtc_build_ssl=false rtc_ssl_root=\"C:/Work/External/openssl/insors/include\" rtc_build_tools=false rtc_include_tests=false rtc_build_examples=false rtc_build_libvpx=false rtc_libvpx_build_vp9=false rtc_include_builtin_video_codecs=false"
Done. Made 671 targets from 176 files in 2428ms
C:\Work\External\webrtc\webrtc-checkout\src>ninja -C out/relaudio webrtc
ninja: Entering directory `out/relaudio'
[219/2465] LIB obj/media/rtc_constants.lib
FAILED: obj/media/rtc_constants.lib
C:/depot_tools/bootstrap-3_8_0_chromium_8_bin/python/bin/python.exe ../../build/toolchain/win/tool_wrapper.py link-wrapper environment.x64 False lib.exe /nologo /ignore:4221 /OUT:obj/media/rtc_constants.lib @obj/media/rtc_constants.lib.rsp
Traceback (most recent call last):
  File "../../build/toolchain/win/tool_wrapper.py", line 31, in <module>
    import win32file    # pylint: disable=import-error
ImportError: No module named win32file
[228/2465] CXX obj/media/rtc_data/sctp_transport.obj
ninja: build stopped: subcommand failed.

[Patrik Höglund]

Hmm. M76 is pretty old. I have no idea what provisioned win32file. It's not used anymore at HEAD. You will have a much easier time if you use WebRTC at HEAD :)

You can try installing win32file, but not into your system python but the provisioned one: C:/depot_tools/bootstrap-3_8_0_chromium_8_bin/python/bin/python.exe. Unfortunately I have no idea which modules this python.exe uses, probably not the ones associated with the system python. 

Maybe it's a better bet to try rolling back your depot_tools to a date close to the M76 branch point, like described in the notice here.

BR,

/ P

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[Alexandre GOUAILLARD]

that works for us:

python -m pip install pywin32

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[John Curley]

Thank you Patrick and Alexandre for the suggestions. I was able to move past this issue by rolling back my depot_tools to a date close to the M76 branch point.

[Alexandre GOUAILLARD]

beware of the auto update ...

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[Alexandre GOUAILLARD]

by the way, patrick, 

we had a discussion with henrik back then about this. I kind of remember that for chrome the depot_tools revision is pinned down (in the dips?), but not in chrome.

Is there a plan to do the same thing with webrtc?

[Patrik Höglund]

Hi!

On Thu, Feb 13, 2020 at 4:07 PM Alexandre GOUAILLARD <agoua...@gmail.com> wrote:

by the way, patrick, 

we had a discussion with henrik back then about this. I kind of remember that for chrome the depot_tools revision is pinned down (in the dips?), but not in chrome.

Is there a plan to do the same thing with webrtc?

Yeah, I think that sounds like a good idea. It would make the build environment a bit more sane. There is no plan, file a bug and we might get to it.

 

On Thu, Feb 13, 2020 at 3:35 PM Alexandre GOUAILLARD <agoua...@gmail.com> wrote:

beware of the auto update ...

Yeah, that's why it suggests you should disable the auto-update in the notice :)

 

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