From 72ce39de3e428decfb1d29aa33ea81e0386c4441 Mon Sep 17 00:00:00 2001
From: Kaito Udagawa <umireon@gmail.com>
Date: Sat, 13 Jun 2015 19:34:20 +0900
Subject: [PATCH] Fix the compilation error against G++ on Mac OS X.

Using `0` as a null pointer is illegal when `-Wzero-as-null-pointer-constant`
is given to G++.  To avoid the warning `zero-as-null-pointer-constant`,
`nullptr` (C++11 keyword) instead of `0` is used in the `sysctl` invocation.
---
 src/sysinfo.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sysinfo.cc b/src/sysinfo.cc
index 45355869..13ef2f89 100644
--- a/src/sysinfo.cc
+++ b/src/sysinfo.cc
@@ -267,7 +267,7 @@ void InitializeSystemInfo() {
   int num_cpus = 0;
   size_t size = sizeof(num_cpus);
   int numcpus_name[] = {CTL_HW, HW_NCPU};
-  if (::sysctl(numcpus_name, arraysize(numcpus_name), &num_cpus, &size, 0, 0) ==
+  if (::sysctl(numcpus_name, arraysize(numcpus_name), &num_cpus, &size, nullptr, 0) ==
           0 &&
       (size == sizeof(num_cpus)))
     cpuinfo_num_cpus = num_cpus;