From a8e2e95d95ae5d05fc432eba0c9b05904a486247 Mon Sep 17 00:00:00 2001
From: Oleg Jukovec <oleg.jukovec@tarantool.org>
Date: Tue, 31 May 2022 09:35:40 +0300
Subject: [PATCH] decrease required go version to 1.12

The error occurs when trying to build the library using go < 1.16:
./alloc.go:14:10: unrecognized Go type _Ctype_void
./alloc.go:16:21: unrecognized Go type _Ctype_void

This is an unnecessary restriction. It can be fixed by replacing
*C.void with unsafe.Pointer (as it is already done for `ptr` argument of
CRYPTO_EX_free[1][2]).

1. https://www.openssl.org/docs/manmaster/man3/SSL_get_ex_new_index.html
2. https://www.openssl.org/docs/man3.0/man3/CRYPTO_EX_free.html

Related to #18
---
 alloc.go | 4 ++--
 go.mod   | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/alloc.go b/alloc.go
index 25d064a2..5497bdc5 100644
--- a/alloc.go
+++ b/alloc.go
@@ -11,9 +11,9 @@ import (
 
 //export go_ssl_crypto_ex_free
 func go_ssl_crypto_ex_free(
-	parent *C.void, ptr unsafe.Pointer,
+	parent unsafe.Pointer, ptr unsafe.Pointer,
 	cryptoData *C.CRYPTO_EX_DATA, idx C.int,
-	argl C.long, argp *C.void,
+	argl C.long, argp unsafe.Pointer,
 ) {
 	pointer.Unref(ptr)
 }
diff --git a/go.mod b/go.mod
index e09148a6..f91b07bf 100644
--- a/go.mod
+++ b/go.mod
@@ -6,4 +6,4 @@ require (
 	golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb // indirect
 )
 
-go 1.16
+go 1.12