When I run delve as below, it errors about internal packages. How to overcome it?

$ dlv debug cmd/geth/main.go
cmd/geth/main.go:35:2: use of internal package not allowed
exit status 1

For those who meet the same question.

Delve need extra param -gcflags=all='-N -l' in the build cmd, you can build it manual instead of by running make geth:

go build -o ./build/bin/geth   -gcflags=all='-N -l' -v ./cmd/geth 

Then you can run

dlv  --headless --listen=:2345 --api-version=2 exec ./build/bin/geth -- ${yourGethParams}

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