From 56ce830286c1f136e460799b20d91132182228a9 Mon Sep 17 00:00:00 2001
From: Carlos Cesario <carloscesario@gmail.com>
Date: Wed, 16 Apr 2014 10:08:47 -0300
Subject: [PATCH] GNU C++ pthread compiler option for AIX.

Ref. https://www.ibm.com/developerworks/aix/library/au-gnu.html

Fixes #5999

Signed-off-by: Michael Friedrich <michael.friedrich@netways.de>
---
 CMakeLists.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5909aa1c6..6db40e7c9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,7 +87,11 @@ endif()
 
 if("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
+  if(${CMAKE_SYSTEM_NAME} MATCHES AIX)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -lpthread")
+  else()
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
+  endif()
 endif()
 
 if(MSVC)