From d5b4abed2f206e492890acc20738e89617ea542c Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Mon, 27 Jun 2022 17:22:53 -0700
Subject: [PATCH] libgo: make runtime.Version return a meaningful string

Fixes golang/go#51850

Change-Id: I50a97de81b3f07855cdae8a02a4b53e7da93f850
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/414734
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
---

diff --git a/libgo/Makefile.am b/libgo/Makefile.am
index a5d4b6a..b03e655 100644
--- a/libgo/Makefile.am
+++ b/libgo/Makefile.am
@@ -568,6 +568,7 @@
 	rm -f goroot.go.tmp
 	echo "package runtime" > goroot.go.tmp
 	echo 'var defaultGOROOT = `$(prefix)`' >> goroot.go.tmp
+	echo 'var buildVersion = `'`cat $(srcdir)/VERSION | sed 1q`' '`$(GOC) --version | sed 1q`'`' >> goroot.go.tmp
 	$(SHELL) $(srcdir)/mvifdiff.sh goroot.go.tmp goroot.go
 	$(STAMP) $@
 
diff --git a/libgo/Makefile.in b/libgo/Makefile.in
index 22f48a5..16ed62a 100644
--- a/libgo/Makefile.in
+++ b/libgo/Makefile.in
@@ -2780,6 +2780,7 @@
 	rm -f goroot.go.tmp
 	echo "package runtime" > goroot.go.tmp
 	echo 'var defaultGOROOT = `$(prefix)`' >> goroot.go.tmp
+	echo 'var buildVersion = `'`cat $(srcdir)/VERSION | sed 1q`' '`$(GOC) --version | sed 1q`'`' >> goroot.go.tmp
 	$(SHELL) $(srcdir)/mvifdiff.sh goroot.go.tmp goroot.go
 	$(STAMP) $@
 
diff --git a/libgo/go/runtime/extern.go b/libgo/go/runtime/extern.go
index a371d9c..8e22614 100644
--- a/libgo/go/runtime/extern.go
+++ b/libgo/go/runtime/extern.go
@@ -231,16 +231,6 @@
 	return defaultGOROOT
 }
 
-// buildVersion is the Go tree's version string at build time.
-//
-// If any GOEXPERIMENTs are set to non-default values, it will include
-// "X:<GOEXPERIMENT>".
-//
-// This is set by the linker.
-//
-// This is accessed by "go version <binary>".
-var buildVersion string
-
 // Version returns the Go tree's version string.
 // It is either the commit hash and date at the time of the build or,
 // when possible, a release tag like "go1.3".
