From 7173c823825a8562b351316ad00af34f6b351d77 Mon Sep 17 00:00:00 2001
From: Andrey Kamaev <andrey.kamaev@itseez.com>
Date: Wed, 17 Oct 2012 17:00:53 +0400
Subject: [PATCH] Include unistd.h to parallel.cpp on UNIX-like systems

This fixes build without TBB and CUDA. Issue #2445
---
 modules/core/src/parallel.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/modules/core/src/parallel.cpp b/modules/core/src/parallel.cpp
index 3ba4388470..c31edede85 100644
--- a/modules/core/src/parallel.cpp
+++ b/modules/core/src/parallel.cpp
@@ -42,6 +42,17 @@
 
 #include "precomp.hpp"
 
+#if defined __linux__ || defined __APPLE__
+    #include <unistd.h>
+    #include <stdio.h>
+    #include <sys/types.h>
+    #if defined ANDROID
+        #include <sys/sysconf.h>
+    #else
+        #include <sys/sysctl.h>
+    #endif
+#endif
+
 #ifdef _OPENMP
     #define HAVE_OPENMP
 #endif
@@ -85,7 +96,6 @@
         #include <omp.h>
     #elif defined HAVE_GCD
         #include <dispatch/dispatch.h>
-        #include <sys/sysctl.h>
         #include <pthread.h>
     #elif defined HAVE_CONCURRENCY
         #include <ppl.h>