GN failure on Windows

[Tekman]

Hi,

After a recent depot_tools update, we're seeing this failure building LKGR 8.5:

ERROR at //gni/v8.gni:179:3: Dependency not allowed.

The item //src/inspector:inspector_string_conversions

can not depend on //:features

because it is not in //:features's visibility list: [

  //.:*

]

The command line we're using is this:

gn gen D:\v8_debug --args='v8_enable_i18n_support=false is_component_build=false v8_monolithic=true v8_use_external_startup_data=false treat_warnings_as_errors=false use_custom_libcxx=false target_cpu=\"x64\" is_clang=false v8_enable_pointer_compression=true enable_iterator_debugging=true is_debug=true'

Any tips or information about what might have changed and how we can fix it?

Thank you!

[Rodrigo Hernandez]

Hi Tekman,

I've seen that error before, apparently there was a bug which allowed the dependency to be done, and that kind of dependency was/is made by older versions/tags.

If you've already run gclient sync AFTER checking out LKGR 8.5 with git and that did not work, you can try manually replacing the gn executable with an older one, one or two months at least.

Hope that helps.

[Tekman]

What is the recommended way to downgrade gn? Should I update its version in the 2 DEPS files, commit and run gclient sync, or literally overwrite gn.exe in \v8\buildtools\win\gn.exe with a binary I grab from somewhere else?

Sorry if this is a basic question, I didn't delve too deep into depot_tools / gn / cpid / etc. because builds "just worked"™ for us until now.

Thanks!

[Rodrigo Hernandez]

You can just replace the binary, you can find binaries at the GN git page here:

https://gn.googlesource.com/gn/+/refs/heads/master

[Julio César Rocha]

Hi, Rodrigo.

Can you help me point where the other binaries, aside from the latest one can be browsed to or downloaded?

I can only see a link to the latest GN binary release.
You can download the latest version of GN binary for Linux, macOS and Windows.  

[Rodrigo Hernandez]

Hi Julio,

Just go to

https://chrome-infra-packages.appspot.com/

And navigate through gn until you get a list of releases matching git hashes. 

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