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libgo patch committed: Export cgoCheck functions

From: Ian Lance Taylor <iant at golang dot org>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>, "gofrontend-dev at googlegroups dot com" <gofrontend-dev at googlegroups dot com>
Date: Fri, 1 Dec 2017 16:46:02 -0800
Subject: libgo patch committed: Export cgoCheck functions
Authentication-results: sourceware.org; auth=none

This patch to libgo exports the cgoCheck functions.  The functions
cgoCheckPointer and cgoCheckResult are called by code generated by
cgo. That means that we need to export them using go:linkname, as
otherwise they are local symbols. The cgo code currently uses weak
references to only call the symbols if they are defined, which is why
it has been working--the cgo code has not been doing any checks.
Bootstrapped and ran Go testsuite on x86_64-pc-linux-gnu.  Committed
to mainline.

Ian

Attachment: patch.txt
Description: Text document

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