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cmd/cgo: C.void broken by CL 230037 #39877

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mdempsky opened this issue Jun 26, 2020 · 2 comments
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cmd/cgo: C.void broken by CL 230037 #39877

mdempsky opened this issue Jun 26, 2020 · 2 comments
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Go1.15

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@mdempsky
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Given:

package p
import "C"
var x *C.void

cgo now emits:

type _Ctype_void = _Ctype_void

type _Ctype_void [0]byte

in _cgo_gotypes.go. It used to only emit the second line.

The type alias needs to be suppressed.
@mdempsky mdempsky added this to the Go1.15 milestone Jun 26, 2020
@mdempsky mdempsky self-assigned this Jun 26, 2020
@gopherbot
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Change https://golang.org/cl/240180 mentions this issue: cmd/cgo: prevent redeclaration of _Ctype_void when C.void is used

@rsc
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rsc commented Jun 26, 2020

FWIW, here is a list of references to C.void in a snapshot of latest modules from the proxy from March 2020. Not a ton but more than I expected.

voids.txt

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