From d639e016504e16438a6de2e1b6bb06a16632ffa9 Mon Sep 17 00:00:00 2001
From: Ayke van Laethem <aykevanlaethem@gmail.com>
Date: Fri, 13 Jan 2023 19:54:05 +0100
Subject: [PATCH] runtime: implement math/rand.fastrand64 to fix linker error

This is needed for Go 1.20 support.
---
 src/runtime/algorithm.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/runtime/algorithm.go b/src/runtime/algorithm.go
index 35e2e260..11b39200 100644
--- a/src/runtime/algorithm.go
+++ b/src/runtime/algorithm.go
@@ -7,6 +7,14 @@ import (
 	"unsafe"
 )
 
+// This function is needed by math/rand since Go 1.20.
+// See: https://github.com/golang/go/issues/54880
+//
+//go:linkname rand_fastrand64 math/rand.fastrand64
+func rand_fastrand64() uint64 {
+	return fastrand64()
+}
+
 // This function is used by hash/maphash.
 func fastrand() uint32 {
 	xorshift32State = xorshift32(xorshift32State)