From ec723e30bc56f098741e1196a70c73096e7ab010 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 26 Jan 2015 08:14:17 +0000
Subject: configure.in: check dtace -G

* configure.in (RUBY_DTRACE_POSTPROCESS): check if the object file
  is really modified by `dtrace -G`, this command is very system
  dependent.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49411 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 configure.in | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.in b/configure.in
index 449c3c5c46..85df4a5266 100644
--- a/configure.in
+++ b/configure.in
@@ -643,7 +643,9 @@ _PROBES
     int main(void){ CONFTEST_FIRE(); return 0; }
 _CONF
     $CC $CFLAGS $CPPFLAGS -c -o conftest.o conftest.c &&
-    $DTRACE -G -s conftest_provider.d conftest.o 2>/dev/null
+    cp -p conftest.o conftest.oo &&
+    $DTRACE -G -s conftest_provider.d conftest.o 2>/dev/null &&
+    ! cmp -b conftest.o conftest.oo
   }; then
     rb_cv_prog_dtrace_g=yes
   else
-- 
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