naruse	2012-12-12 16:36:32 +0900 (Wed, 12 Dec 2012)

  New Revision: 38342

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=38342

  Log:
    * configure.in: add -fno-omit-frame-pointer if libexecinfo is used.
      At least on FreeBSD ruby will crash on getting C backtrace
      when it is compiled with other than -O0.
    
    * vm_dump.c: enable backtrace on FreeBSD even if with optimizations.

  Modified files:
    trunk/ChangeLog
    trunk/configure.in
    trunk/vm_dump.c

Index: configure.in
===================================================================
--- configure.in	(revision 38341)
+++ configure.in	(revision 38342)
@@ -2378,6 +2378,12 @@ AS_CASE(["$target_cpu-$target_os"], https://github.com/ruby/ruby/blob/trunk/configure.in#L2378
     AC_CHECK_HEADERS([execinfo.h])
     if test "x$ac_cv_header_execinfo_h" = xyes; then
 	AC_CHECK_LIB([execinfo], [backtrace])
+	execinfo_frame_pointer=no
+	RUBY_TRY_CFLAGS(-fno-omit-frame-pointer, [execinfo_frame_pointer=yes])
+	if test "x$execinfo_frame_pointer" = xyes; then
+	    optflags="${optflags+$optflags }-fno-omit-frame-pointer"
+	    CFLAGS="$CFLAGS -fno-omit-frame-pointer"
+	fi
     fi])
 AC_CHECK_FUNCS(backtrace)
 
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 38341)
+++ ChangeLog	(revision 38342)
@@ -1,3 +1,11 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Wed Dec 12 15:30:11 2012  NARUSE, Yui  <naruse@r...>
+
+	* configure.in: add -fno-omit-frame-pointer if libexecinfo is used.
+	  At least on FreeBSD ruby will crash on getting C backtrace
+	  when it is compiled with other than -O0.
+
+	* vm_dump.c: enable backtrace on FreeBSD even if with optimizations.
+
 Wed Dec 12 16:08:04 2012  Nobuyoshi Nakada  <nobu@r...>
 
 	* test/rdoc/test_rdoc_rdoc.rb (TestRDocRDoc#test_normalized_file_list_non_file_directory):
Index: vm_dump.c
===================================================================
--- vm_dump.c	(revision 38341)
+++ vm_dump.c	(revision 38342)
@@ -424,9 +424,6 @@ rb_vmdebug_thread_dump_state(VALUE self) https://github.com/ruby/ruby/blob/trunk/vm_dump.c#L424
     return Qnil;
 }
 
-#if defined(__FreeBSD__) && defined(__OPTIMIZE__)
-#undef HAVE_BACKTRACE
-#endif
 #ifndef HAVE_BACKTRACE
 #define HAVE_BACKTRACE 0
 #endif

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