[gcc(refs/users/guojiufu/heads/guojiufu-branch)] libgo: update x/sys/cpu after gccgo support added

[Jiu Fu Guo]

https://gcc.gnu.org/g:adad99eb906164af7d2b398ad7e430aebe3adeb4

commit adad99eb906164af7d2b398ad7e430aebe3adeb4
Author: Clément Chigot <chigot.c@gmail.com>
Date:   Tue May 19 16:03:54 2020 +0200

    libgo: update x/sys/cpu after gccgo support added
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/234597

Diff:
---
 gcc/go/gofrontend/MERGE                            |  2 +-
 .../x/sys/cpu/{cpu_aix_ppc64.go => cpu_aix.go}     |  2 +-
 libgo/go/golang.org/x/sys/cpu/syscall_aix_gccgo.go | 27 ++++++++++++++++++++++
 3 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index bc9c1f07eda..284374820b0 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-bc27341f245a5cc54ac7530d037a609db72b677c
+ea58b8491064fbed18a220571a3043c38dccf7c7
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/golang.org/x/sys/cpu/cpu_aix_ppc64.go b/libgo/go/golang.org/x/sys/cpu/cpu_aix.go
similarity index 96%
rename from libgo/go/golang.org/x/sys/cpu/cpu_aix_ppc64.go
rename to libgo/go/golang.org/x/sys/cpu/cpu_aix.go
index b0ede112d4e..02d03129e50 100644
--- a/libgo/go/golang.org/x/sys/cpu/cpu_aix_ppc64.go
+++ b/libgo/go/golang.org/x/sys/cpu/cpu_aix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build aix,ppc64
+// +build aix
 
 package cpu
 
diff --git a/libgo/go/golang.org/x/sys/cpu/syscall_aix_gccgo.go b/libgo/go/golang.org/x/sys/cpu/syscall_aix_gccgo.go
new file mode 100644
index 00000000000..2609cc49ae7
--- /dev/null
+++ b/libgo/go/golang.org/x/sys/cpu/syscall_aix_gccgo.go
@@ -0,0 +1,27 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Recreate a getsystemcfg syscall handler instead of
+// using the one provided by x/sys/unix to avoid having
+// the dependency between them. (See golang.org/issue/32102)
+// Morover, this file will be used during the building of
+// gccgo's libgo and thus must not use a CGo method.
+
+// +build aix
+// +build gccgo
+
+package cpu
+
+import (
+	"syscall"
+)
+
+//extern getsystemcfg
+func gccgoGetsystemcfg(label uint32) (r uint64)
+
+func callgetsystemcfg(label int) (r1 uintptr, e1 syscall.Errno) {
+	r1 = uintptr(gccgoGetsystemcfg(uint32(label)))
+	e1 = syscall.GetErrno()
+	return
+}