shyouhei	2018-09-26 15:16:32 +0900 (Wed, 26 Sep 2018)

  New Revision: 64852

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64852

  Log:
    use configure-defined macro instead of __GNUC__

  Modified files:
    trunk/include/ruby/ruby.h
Index: include/ruby/ruby.h
===================================================================
--- include/ruby/ruby.h	(revision 64851)
+++ include/ruby/ruby.h	(revision 64852)
@@ -1770,7 +1770,7 @@ VALUE rb_check_symbol(volatile VALUE *na https://github.com/ruby/ruby/blob/trunk/include/ruby/ruby.h#L1770
     do RUBY_CONST_ID_CACHE((var) =, (str)) while (0)
 #define CONST_ID_CACHE(result, str) RUBY_CONST_ID_CACHE(result, str)
 #define CONST_ID(var, str) RUBY_CONST_ID(var, str)
-#ifdef __GNUC__
+#ifdef HAVE_BUILTIN___BUILTIN_CONSTANT_P
 /* __builtin_constant_p and statement expression is available
  * since gcc-2.7.2.3 at least. */
 #define rb_intern(str) \

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