kazu	2018-07-12 12:59:13 +0900 (Thu, 12 Jul 2018)

  New Revision: 63958

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=63958

  Log:
    Fix compile error on debian8 and gentoo
    
    https://rubyci.org/logs/rubyci.s3.amazonaws.com/debian8/ruby-trunk/log/20180711T213004Z.log.html.gz#miniruby
    https://rubyci.org/logs/rubyci.s3.amazonaws.com/gentoo/ruby-trunk/log/20180711T213003Z.log.html.gz#miniruby
    ```
    ./include/ruby/ruby.h:2213:49: error: missing binary operator before token "("
     # if defined(__has_attribute) && __has_attribute(diagnose_if)
                                                     ^
    ```

  Modified files:
    trunk/include/ruby/ruby.h
Index: include/ruby/ruby.h
===================================================================
--- include/ruby/ruby.h	(revision 63957)
+++ include/ruby/ruby.h	(revision 63958)
@@ -2210,7 +2210,10 @@ ERRORFUNC(("variable argument length doe https://github.com/ruby/ruby/blob/trunk/include/ruby/ruby.h#L2210
 
 # define rb_scan_args_isdigit(c) ((unsigned char)((c)-'0')<10)
 
-# if defined(__has_attribute) && __has_attribute(diagnose_if)
+#if !defined(__has_attribute)
+#define __has_attribute(x) 0
+#endif
+# if __has_attribute(diagnose_if)
 #  define rb_scan_args_count_end(fmt, ofs, varc, vari) \
      (fmt[ofs] ? rb_scan_args_bad_format(fmt) : (vari))
 # else

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