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-rw-r--r--include/ruby/3/has/builtin.h11
1 files changed, 6 insertions, 5 deletions
diff --git a/include/ruby/3/has/builtin.h b/include/ruby/3/has/builtin.h
index 54dc2a5672..f1524061ae 100644
--- a/include/ruby/3/has/builtin.h
+++ b/include/ruby/3/has/builtin.h
@@ -1,4 +1,6 @@
-/** \noop-*-C++-*-vi:ft=cpp
+#ifndef RUBY3_HAS_BUILTIN_H /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY3_HAS_BUILTIN_H
+/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @copyright This file is a part of the programming language Ruby.
@@ -21,10 +23,7 @@
#include "ruby/3/config.h"
/** Wraps (or simulates) `__has_builtin`. */
-#if defined(RUBY3_HAS_BUILTIN)
-# /* Take that. */
-
-#elif defined(__has_builtin) && ! RUBY3_COMPILER_IS(Intel)
+#if defined(__has_builtin) && ! RUBY3_COMPILER_IS(Intel)
# /* :TODO: Intel C Compiler has __has_builtin (since 19.1 maybe?), and is
# * reportedly broken. We have to skip them. However the situation can
# * change. They might improve someday. We need to revisit here later. */
@@ -89,3 +88,5 @@
# define RUBY3_HAS_BUILTIN___builtin_unreachable 1
# endif
#endif
+
+#endif /* RUBY3_HAS_BUILTIN_H */