Resolve "Refactoring WOLF installation system"

Closes #451 (closed)

test/gtest/CMakeLists.txt

@@ -12,7 +12,7 @@ if(${CMAKE_VERSION} VERSION_LESS "3.11.0")
   # This is a known issue for MinGW :
   # https://github.com/google/shaderc/pull/174
   #if(MINGW)
-      set(GTEST_DISABLE_PTHREADS ON)
+  #    set(GTEST_DISABLE_PTHREADS ON)
   #endif()
 
   # Download GoogleTest
@@ -52,6 +52,8 @@ if(${CMAKE_VERSION} VERSION_LESS "3.11.0")
       "IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}"
   )
 
+  include_directories(${GTEST_INCLUDE_DIRS})
+
 else()
 
   message("CMake version equal or greater than 3.11.0")
@@ -71,4 +73,4 @@ function(wolf_add_gtest target)
   add_executable(${target} ${ARGN})
   target_link_libraries(${target}  gtest_main)
   add_test(NAME ${target} COMMAND ${target})
-endfunction()
\ No newline at end of file
+endfunction()