From 5a68f814e9489754fcdb34d896d9d3bff39e010e Mon Sep 17 00:00:00 2001
From: Jim Huang <jserv.tw@gmail.com>
Date: Thu, 15 Mar 2018 01:17:12 +0800
Subject: [PATCH] Don't assume availability of get_nprocs_conf()

get_nprocs_conf() is Linux-specific, and on macOS, it is absent.
Our own implementation of get_nprocs_conf() on macOS is provided
for compatibility.
---
 src/pow_sse.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/pow_sse.c b/src/pow_sse.c
index 38939da..c7db6ef 100644
--- a/src/pow_sse.c
+++ b/src/pow_sse.c
@@ -29,11 +29,28 @@
 #include <stdio.h>
 #include <string.h>
 #include <pthread.h>
-#include <sys/sysinfo.h>
 #include "pow_sse.h"
 #include "./hash/curl.h"
 #include "constants.h"
 
+/* Required for get_nprocs_conf() on Linux */
+#ifdef NPROCS
+#include <sys/sysinfo.h>
+#endif
+
+/* On Mac OS X, define our own get_nprocs_conf() */
+#if defined (__APPLE__) || defined(__FreeBSD__)
+#include <sys/sysctl.h>
+unsigned int get_nprocs_conf()
+{
+	int numProcessors = 0;
+	size_t size = sizeof(numProcessors);
+	if (sysctlbyname("hw.ncpu", &numProcessors, &size, NULL, 0)) return 1;
+	return (unsigned int) numProcessors;
+}
+#define NPROCS
+#endif
+
 pthread_mutex_t *pow_sse_mutex;
 int *stopSSE;
 long long int *countSSE;