MAPREDUCE-6078. native-task: fix gtest build on macosx (Binglin Chang)

Author: aw-was-here

hadoop-mapreduce-project/CHANGES.txt

@@ -222,6 +222,8 @@ Trunk (Unreleased)
 
     MAPREDUCE-6077. native-task: Remove CustomModule examples in nativetask (seanzhong)
 
+    MAPREDUCE-6078. native-task: fix gtest build on macosx (Binglin Chang)
+
 Release 2.6.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-nativetask/src/CMakeLists.txt

@@ -249,11 +249,6 @@ add_executable(nttest
     ${D}/test/test_commons.cc)
 
 
-IF (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
-    # macos clang with libc++ does not have tr1/tuple, just tuple
-    SET_TARGET_PROPERTIES(nttest PROPERTIES COMPILE_FLAGS "-DGTEST_USE_OWN_TR1_TUPLE=1")
-ENDIF()
-
 target_link_libraries(nttest
      nativetask_static
      gtest