From d2f67b92c6ed46fb6dc9f9a65580b6ae63f72472 Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Tue, 2 Jul 2013 12:39:26 +0200
Subject: [PATCH] build: use AM_PROG_AR conditionally

AM_PROG_AR does not exist in automake v0.11 but without it, you can't
build libuv with automake v0.12+ on Darwin.
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index cf0a966d..2cd91e4f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,7 +21,8 @@ AC_CANONICAL_HOST
 AC_ENABLE_SHARED
 AC_ENABLE_STATIC
 AC_PROG_CC
-AM_PROG_AR
+# AM_PROG_AR is not available in automake v0.11 but it's essential in v0.12.
+m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
 LT_INIT
 # TODO(bnoordhuis) Check for -pthread vs. -pthreads
 AC_CHECK_LIB([dl], [dlopen])