cmd/compile: a rebuild is needed when cgo static library is changed. #29293
Description
What version of Go are you using (go version)?
go version go1.11.3 linux/amd64
Does this issue reproduce with the latest release?
yes
What did you do?
My cgo project supports module.
The project depends on a c static library.
After a successful build, I updated the static library, then "go build" again.
What did you expect to see?
A rebuild to use the new static library.
What did you see instead?
I looks the "go build" is finished in half a second by using cache.
The new static library is not used.