cmd/cgo: improve error message for unknown name

Fixes #70472

Change-Id: Ib50d1dd5a648afc199ed62a507d54d0b0ccb1da2
Reviewed-on: https://go-review.googlesource.com/c/go/+/630375
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>

diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go
index 7ef6c170d1acb0e5de0a8d72d13490a0c8e8cdb3..d2d7b894b53bb4c303c3f9ab028ae5823f49cf64 100644 (file)
--- a/src/cmd/cgo/gcc.go
+++ b/src/cmd/cgo/gcc.go
@@ -490,7 +490,7 @@ func (p *Package) guessKinds(f *File) []*Name {
                                // Don't report an error, and skip adding n to the needType array.
                                continue
                        }
-                       error_(f.NamePos[n], "could not determine kind of name for C.%s", fixGo(n.Go))
+                       error_(f.NamePos[n], "could not determine what C.%s refers to", fixGo(n.Go))
                case notStrLiteral | notType:
                        n.Kind = "iconst"
                case notIntConst | notStrLiteral | notType: