compiler, runtime: support and use single argument go:linkname

    
    The gc compiler has started permitting go:linkname comments with a
    single argument to mean that a function should be externally visible
    outside the package.  Implement this in the Go frontend.
    
    Change the libgo runtime package to use it, rather than repeating the
    name just to export a function.
    
    Remove a couple of unnecessary go:linkname comments on declarations.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/192197

From-SVN: r275239

1 files changed, 8 insertions, 9 deletions

diff --git a/libgo/go/runtime/runtime1.go b/libgo/go/runtime/runtime1.go
index 2424f20..d9309cc 100644
--- a/libgo/go/runtime/runtime1.go
+++ b/libgo/go/runtime/runtime1.go
@@ -11,16 +11,15 @@ import (
 )
 
 // For gccgo, while we still have C runtime code, use go:linkname to
-// rename some functions to themselves, so that the compiler will
-// export them.
+// export some functions to themselves.
 //
-//go:linkname gotraceback runtime.gotraceback
-//go:linkname args runtime.args
-//go:linkname goargs runtime.goargs
-//go:linkname check runtime.check
-//go:linkname goenvs_unix runtime.goenvs_unix
-//go:linkname parsedebugvars runtime.parsedebugvars
-//go:linkname timediv runtime.timediv
+//go:linkname gotraceback
+//go:linkname args
+//go:linkname goargs
+//go:linkname check
+//go:linkname goenvs_unix
+//go:linkname parsedebugvars
+//go:linkname timediv
 
 // Keep a cached value to make gotraceback fast,
 // since we call it on every call to gentraceback.