From cbca2399c624f84cfc84a6788c7fdf760f207522 Mon Sep 17 00:00:00 2001
From: Carles Fernandez <carles.fernandez@gmail.com>
Date: Sun, 26 Nov 2017 00:18:21 +0100
Subject: [PATCH] Improve CMake usage for Threads

---
 CMakeLists.txt | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b2651b25..66fa25b8b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -409,12 +409,21 @@ endif(NOT ENABLE_GENERIC_ARCH)
 
 
 ################################################################################
-# Find a thread library
+# Find the POSIX thread (pthread) libraries
 ################################################################################
-if(NOT OS_IS_MACOSX)
+if(CMAKE_VERSION VERSION_LESS 3.1)
     find_package(Threads REQUIRED)
     link_libraries(${CMAKE_THREAD_LIBS_INIT})
-endif(NOT OS_IS_MACOSX)
+else(CMAKE_VERSION VERSION_LESS 3.1)
+    set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
+    if(CMAKE_CROSSCOMPILING)
+        set(THREADS_PREFER_PTHREAD_FLAG FALSE)
+    else(CMAKE_CROSSCOMPILING)
+        set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+    endif(CMAKE_CROSSCOMPILING)
+    find_package(Threads REQUIRED)
+    link_libraries(Threads::Threads)
+endif(CMAKE_VERSION VERSION_LESS 3.1)