From 9176c5b1ed741e1d6279992a529f7b04fee713d2 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 10 Feb 2016 03:03:57 +0000
Subject: check ar D flag

* configure.in (ARFLAGS): check if deterministic mode flag is
  effective, which is on by default on Ubuntu.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53798 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 configure.in | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'configure.in')

diff --git a/configure.in b/configure.in
index 040484b5ab..dba9d4a097 100644
--- a/configure.in
+++ b/configure.in
@@ -567,6 +567,12 @@ AC_CHECK_TOOL(AR, ar)
 if test -z "$AR"; then
   AC_CHECK_PROGS(AR, aal, ar)
 fi
+AC_CACHE_CHECK([for $AR D option], [rb_cv_ar_D_option], [
+    AS_IF([$AR rcD conftest.a > /dev/null 2>&1 && rm conftest.a],
+	[rb_cv_ar_D_option=yes], [rb_cv_ar_D_option=no])
+])
+AS_IF([test "$rb_cv_ar_D_option" = yes], [ARFLAGS=rcD], [ARFLAGS=rcu])
+AC_SUBST(ARFLAGS)
 
 AC_CHECK_TOOL(AS, as)
 ASFLAGS=$ASFLAGS
-- 
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