From d7057d429ea840b95d51230e0d829d9a3faa6981 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Sun, 16 Jul 2017 11:55:57 -0700
Subject: [PATCH] Merge #10766: Building Environment: Set ARFLAGS to cr
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912da1dcc Use AC_ARG_VAR to set ARFLAGS. (René Nyffenegger)

Pull request description:

  Override the default of ARFLAGS of `cru` to `cr`.

  When building, ar produces a warning for each archive, for example
  ```
    AR       libbitcoin_server.a
  /usr/bin/ar: `u' modifier ignored since `D' is the default (see `U')

  ```
  Since `u` is the default anyway, it cannot hurt to remove it.

Tree-SHA512: 7466764f847b70f0f67db25dac87a7794477abf1997cb946682f394fe80ae86ac3ed52cbadb35f0c18a87467755bde5a5158430444cd26fb60fa363cc7bd486d
---
 configure.ac | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index c6446f1d79..6f7ce329d9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,6 +19,12 @@ BITCOIN_GUI_NAME=dash-qt
 BITCOIN_CLI_NAME=dash-cli
 BITCOIN_TX_NAME=dash-tx
 
+dnl Unless the user specified ARFLAGS, force it to be cr
+AC_ARG_VAR(ARFLAGS, [Flags for the archiver, defaults to <cr> if not set])
+if test "x${ARFLAGS+set}" != "xset"; then
+  ARFLAGS="cr"
+fi
+
 AC_CANONICAL_HOST
 
 AH_TOP([#ifndef DASH_CONFIG_H])
@@ -1344,4 +1350,5 @@ echo "  CPPFLAGS            = $CPPFLAGS"
 echo "  CXX                 = $CXX"
 echo "  CXXFLAGS            = $CXXFLAGS"
 echo "  LDFLAGS             = $LDFLAGS"
+echo "  ARFLAGS       = $ARFLAGS"
 echo