https://git.ruby-lang.org/ruby.git/commit/?id=06321ea26c

From 06321ea26c186434e5b943a6739ffd6bd1eb06d9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=9C=E9=83=A8=E6=98=8C=E5=B9=B3?=
 <shyouhei@r...>
Date: Mon, 25 May 2020 10:17:51 +0900
Subject: RBIMPL_ATTR_DEPRECATED: disable for GCC10

GCC 10.x seems buggy here.  See also https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95302

diff --git a/include/ruby/internal/attr/deprecated.h b/include/ruby/internal/attr/deprecated.h
index 0cdf126..38a7dee 100644
--- a/include/ruby/internal/attr/deprecated.h
+++ b/include/ruby/internal/attr/deprecated.h
@@ -31,6 +31,10 @@ https://github.com/ruby/ruby/blob/trunk/include/ruby/internal/attr/deprecated.h#L31
 #if RBIMPL_HAS_EXTENSION(attribute_deprecated_with_message)
 # define RBIMPL_ATTR_DEPRECATED(msg) __attribute__((__deprecated__ msg))
 
+#elif defined(__cplusplus) && RBIMPL_COMPILER_SINCE(GCC, 10, 1, 0) /* && RBIMPL_COMPILER_BEFORE(GCC, 10, X, Y) */
+# /* https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95302 */
+# define RBIMPL_ATTR_DEPRECATED(msg) /* disable until they fix this bug */
+
 #elif RBIMPL_COMPILER_SINCE(GCC, 4, 5, 0)
 # define RBIMPL_ATTR_DEPRECATED(msg) __attribute__((__deprecated__ msg))
 
-- 
cgit v0.10.2


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