Remove using namespace from Library

CMakeLists.txt

@@ -24,6 +24,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED            ON)
 set(CMAKE_CXX_EXTENSIONS                  OFF)
 set(CMAKE_EXPORT_COMPILE_COMMANDS          ON)
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TORCH_CXX_FLAGS}")
+SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
 
 # Options
 # -------
@@ -41,11 +42,11 @@ if(Boost_FOUND)
     include_directories(${Boost_INCLUDE_DIRS}) 
 endif()
 
-SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
 # CMakes modules
 # --------------
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})
 include(AddGitSubmodule)
+
 if (CODE_COVERAGE)
     enable_testing()
     include(CodeCoverage)