From f6ba75e51e05bdb2a88f33e3825ee7e45bd500b1 Mon Sep 17 00:00:00 2001
From: Kazuki Yamaguchi <k@rhe.jp>
Date: Wed, 7 Jun 2023 03:44:07 +0900
Subject: Drop support for Ruby 2.6

Ruby 2.6 has reached EOL on 2022-03. Requiring Ruby 2.7 allows us to
use C99 syntax.
---
 .github/workflows/test.yml |  2 +-
 ext/openssl/ossl.c         | 16 ----------------
 ext/openssl/ossl.h         |  6 ------
 openssl.gemspec            |  2 +-
 4 files changed, 2 insertions(+), 24 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a137877d..84b0580b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     uses: ruby/actions/.github/workflows/ruby_versions.yml@master
     with:
       engine: cruby-truffleruby
-      min_version: 2.6
+      min_version: 2.7
   test:
     needs: ruby-versions
     name: >-
diff --git a/ext/openssl/ossl.c b/ext/openssl/ossl.c
index 81069c8b..c3b9f47a 100644
--- a/ext/openssl/ossl.c
+++ b/ext/openssl/ossl.c
@@ -369,22 +369,6 @@ ossl_get_errors(VALUE _)
  */
 VALUE dOSSL;
 
-#if !defined(HAVE_VA_ARGS_MACRO)
-void
-ossl_debug(const char *fmt, ...)
-{
-    va_list args;
-
-    if (dOSSL == Qtrue) {
-	fprintf(stderr, "OSSL_DEBUG: ");
-	va_start(args, fmt);
-	vfprintf(stderr, fmt, args);
-	va_end(args);
-	fprintf(stderr, " [CONTEXT N/A]\n");
-    }
-}
-#endif
-
 /*
  * call-seq:
  *   OpenSSL.debug -> true | false
diff --git a/ext/openssl/ossl.h b/ext/openssl/ossl.h
index facb80aa..8add914f 100644
--- a/ext/openssl/ossl.h
+++ b/ext/openssl/ossl.h
@@ -157,7 +157,6 @@ VALUE ossl_to_der_if_possible(VALUE);
  */
 extern VALUE dOSSL;
 
-#if defined(HAVE_VA_ARGS_MACRO)
 #define OSSL_Debug(...) do { \
   if (dOSSL == Qtrue) { \
     fprintf(stderr, "OSSL_DEBUG: "); \
@@ -166,11 +165,6 @@ extern VALUE dOSSL;
   } \
 } while (0)
 
-#else
-void ossl_debug(const char *, ...);
-#define OSSL_Debug ossl_debug
-#endif
-
 /*
  * Include all parts
  */
diff --git a/openssl.gemspec b/openssl.gemspec
index 3a2f64f6..674dc20d 100644
--- a/openssl.gemspec
+++ b/openssl.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.extra_rdoc_files = Dir["*.md"]
   spec.rdoc_options = ["--main", "README.md"]
 
-  spec.required_ruby_version = ">= 2.6.0"
+  spec.required_ruby_version = ">= 2.7.0"
 
   spec.metadata["msys2_mingw_dependencies"] = "openssl"
 end
-- 
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