https://git.ruby-lang.org/ruby.git/commit/?id=01826b3fda

From 01826b3fda53a98d8fe57e698be52143e1fef2d6 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: Wed, 19 Aug 2020 16:18:59 +0900
Subject: RBIMPL_HAS_CPP_ATTRIBUTE: handle SunPro

Oracle Developer Studio's C++ preprocessor started to understand
__has_cpp_attribute since version 12.5, and is broken.  After looking
around for a while I found Boost and ICU also had this issue before.
Let me add workaround for it.

diff --git a/include/ruby/internal/has/cpp_attribute.h b/include/ruby/internal/has/cpp_attribute.h
index 9c12765..255f611 100644
--- a/include/ruby/internal/has/cpp_attribute.h
+++ b/include/ruby/internal/has/cpp_attribute.h
@@ -25,7 +25,16 @@ https://github.com/ruby/ruby/blob/trunk/include/ruby/internal/has/cpp_attribute.h#L25
 #include "ruby/internal/token_paste.h"
 
 /** @cond INTERNAL_MACRO */
-#if defined(__has_cpp_attribute)
+#if RBIMPL_COMPILER_IS(SunPro)
+# /* Oracle Developer Studio 12.5's C++  preprocessor is reportedly broken.  We
+#  * could simulate  __has_cpp_attribute like below,  but don't know  the exact
+#  * list of which version supported which attribute.  Just kill everything for
+#  * now.  If you can please :FIXME: */
+# /* https://unicode-org.atlassian.net/browse/ICU-12893 */
+# /* https://github.com/boostorg/config/pull/95 */
+# define RBIMPL_HAS_CPP_ATTRIBUTE0(_) 0
+
+#elif defined(__has_cpp_attribute)
 # define RBIMPL_HAS_CPP_ATTRIBUTE0(_) __has_cpp_attribute(_)
 
 #elif RBIMPL_COMPILER_IS(MSVC)
@@ -60,7 +69,6 @@ https://github.com/ruby/ruby/blob/trunk/include/ruby/internal/has/cpp_attribute.h#L69
 # /* :FIXME:
 #  * Candidate compilers to list here:
 #  * - icpc: They have __INTEL_CXX11_MODE__.
-#  * - SunPro: Seems they support C++11.
 #  */
 # define RBIMPL_HAS_CPP_ATTRIBUTE0(_) 0
 #endif
-- 
cgit v0.10.2


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