golang/go

cmd/go: build cache does not check #included headers for changes

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#24,355 opened on Mar 12, 2018

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GoCommandNeedsInvestigationhelp wanted

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Description

go 1.10 linux/amd64

The go build and go test commands don't rebuild packages if included cgo files changed. I guess a solution would be to run the preprocessor first or disable caching for packages that use cgo altogether.

Contributor guide

Research direction
Investigate how the Go build cache determines when to rebuild packages that use cgo, focusing on detecting changes in preprocessed C header files included via #include directives.
Tech stack
go
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Gocgobuild cache
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60