From: "xtkoba (Tee KOBAYASHI)" <noreply@...>
Date: 2021-09-25T18:24:19+00:00
Subject: [ruby-core:105419] [Ruby master Misc#18192] Advertise that OpenSSL	3.0 is not supported

Issue #18192 has been reported by xtkoba (Tee KOBAYASHI).

----------------------------------------
Misc #18192: Advertise that OpenSSL 3.0 is not supported
https://bugs.ruby-lang.org/issues/18192

* Author: xtkoba (Tee KOBAYASHI)
* Status: Open
* Priority: Normal
----------------------------------------
Can we document that OpenSSL 3.0 is not supported?

I believe at least we can make `extconf.rb` fail with OpenSSL 3.0:

```diff
--- a/ext/openssl/extconf.rb
+++ b/ext/openssl/extconf.rb
@@ -108,10 +108,12 @@
     try_static_assert("LIBRESSL_VERSION_NUMBER >= 0x30100000L", "openssl/opensslv.h") }
 else
   checking_for("OpenSSL version >= 1.0.2") {
-    try_static_assert("OPENSSL_VERSION_NUMBER >= 0x10002000L", "openssl/opensslv.h") }
+    try_static_assert("OPENSSL_VERSION_NUMBER >= 0x10002000L", "openssl/opensslv.h") } &&
+  checking_for("OpenSSL version < 3.0.0") {
+    try_static_assert("OPENSSL_VERSION_NUMBER < 0x30000000L", "openssl/opensslv.h") }
 end
 unless version_ok
-  raise "OpenSSL >= 1.0.2 or LibreSSL >= 3.1.0 is required"
+  raise "OpenSSL >= 1.0.2, < 3.0.0 or LibreSSL >= 3.1.0 is required"
 end
 
 # Prevent wincrypt.h from being included, which defines conflicting macro with openssl/x509.h
```



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