https://git.ruby-lang.org/ruby.git/commit/?id=1c7f2cceac

From 1c7f2cceac59dfed6be66ef502bb4ca615a78173 Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 5 Apr 2021 00:05:42 +0000
Subject: merge revision(s) abe2e7de4d1f2d5861d7c9ab9c7e778f2ee1dcd2: [Backport
 #16774]

	Don't require sub-word atomics

	On some architectures (like RISC-V) sub-word atomics are only available
	when linking against -latomic, but the configure script doesn't do that,
	causing the atomic checks to fail and the resulting ruby binary is
	non-functional.  Ruby does not use sub-word atomic operations, rb_atomic_t
	is defined to unsigned int, so use unsigned int when checking for atomic
	operations.
	---
	 configure.ac | 4 ++--
	 1 file changed, 2 insertions(+), 2 deletions(-)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_6@67932 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 configure.ac | 4 ++--
 version.h    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0a1d79c..282cf46 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1430,7 +1430,7 @@ AS_IF([test "$GCC" = yes], [ https://github.com/ruby/ruby/blob/trunk/configure.ac#L1430
     ])
 
     AC_CACHE_CHECK([for __atomic builtins], [rb_cv_gcc_atomic_builtins], [
-	AC_TRY_LINK([unsigned char atomic_var;],
+	AC_TRY_LINK([unsigned int atomic_var;],
 		    [
 			__atomic_exchange_n(&atomic_var, 0, __ATOMIC_SEQ_CST);
 			__atomic_exchange_n(&atomic_var, 1, __ATOMIC_SEQ_CST);
@@ -1445,7 +1445,7 @@ AS_IF([test "$GCC" = yes], [ https://github.com/ruby/ruby/blob/trunk/configure.ac#L1445
     ])
 
     AC_CACHE_CHECK([for __sync builtins], [rb_cv_gcc_sync_builtins], [
-	AC_TRY_LINK([unsigned char atomic_var;],
+	AC_TRY_LINK([unsigned int atomic_var;],
 		    [
 			__sync_lock_test_and_set(&atomic_var, 0);
 			__sync_lock_test_and_set(&atomic_var, 1);
diff --git a/version.h b/version.h
index 868edf6..b359e8b 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@ https://github.com/ruby/ruby/blob/trunk/version.h#L1
 #define RUBY_VERSION "2.6.7"
 #define RUBY_RELEASE_DATE "2021-04-05"
-#define RUBY_PATCHLEVEL 191
+#define RUBY_PATCHLEVEL 192
 
 #define RUBY_RELEASE_YEAR 2021
 #define RUBY_RELEASE_MONTH 4
-- 
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