kosaki	2013-03-16 14:06:32 +0900 (Sat, 16 Mar 2013)

  New Revision: 39771

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=39771

  Log:
    * configure.in (_FORTIFY_SOURCE): added a few comments.

  Modified files:
    trunk/ChangeLog
    trunk/configure.in

Index: configure.in
===================================================================
--- configure.in	(revision 39770)
+++ configure.in	(revision 39771)
@@ -684,6 +684,10 @@ if test "$GCC" = yes; then https://github.com/ruby/ruby/blob/trunk/configure.in#L684
     test "${debugflags+set}" || {RUBY_TRY_CFLAGS(-g3, [debugflags=-g3])}
 
     # -D_FORTIFY_SOURCE
+    # When defined _FORTIFY_SOURCE, glibc enables some additional sanity
+    # argument check. The performance drop is very little and Ubuntu enables
+    # _FORTIFY_SOURCE=2 by default. So, let's support it for protecting us from
+    # a mistake of silly C extensions.
     RUBY_TRY_CFLAGS(-D_FORTIFY_SOURCE=2, [RUBY_APPEND_OPTION(XCFLAGS, -D_FORTIFY_SOURCE=2)])
 
     # -fstack-protector
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 39770)
+++ ChangeLog	(revision 39771)
@@ -1,3 +1,7 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Fri Mar 15 14:45:02 2013  KOSAKI Motohiro  <kosaki.motohiro@g...>
+
+	* configure.in (_FORTIFY_SOURCE): added a few comments.
+
 Fri Mar 15 14:17:55 2013  KOSAKI Motohiro  <kosaki.motohiro@g...>
 
 	* thread_pthread.c (numberof): renamed from ARRAY_SIZE() because

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