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cmd/cgo: fails using pointers to C structs on exported functions #2612

gopherbot opened this issue Dec 23, 2011 · 3 comments


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commented Dec 23, 2011

by alexander.surma:

I build a small testcase for this particular problem:

If you compile as is, the following error occurs:
unrecognized Go type *ast.StructType
unrecognized Go type *ast.StructType

If you comment out the current `Callback` implementation, and uncomment the other one
(as well as the import of the unsafe package). It will compile (and work as expected).

The problem does NOT occur, when:
* the function is not exported
* the parameter is not a struct (e.g. * as a parameter type works just fine)

The problem does ALSO occur:
* when the using a pointer to a C struct as a return type
* when the parameter is just a C struct (i.e. NOT a pointer)

I'm on Mac OS 10.7.2, using weekly-2011-12-22 darwin/amd64. Same error on tip.

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commented Jan 4, 2012

Comment 1:

Labels changed: added priority-go1, cgo, removed priority-triage.

Status changed to Accepted.


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commented Jan 13, 2012

Comment 2:

Owner changed to


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commented Feb 19, 2012

Comment 4:

This issue was closed by revision 1a0c8fe.

Status changed to Fixed.

@rsc rsc added this to the Go1 milestone Apr 10, 2015

@rsc rsc removed the priority-go1 label Apr 10, 2015

@golang golang locked and limited conversation to collaborators Jun 24, 2016

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