Add google test as git submodule.

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "googletest"]
+	path = googletest
+	url = https://github.com/smarr/googletest.git

CMakeLists.txt

@@ -137,9 +137,11 @@ install(
 ENABLE_TESTING()
 ADD_SUBDIRECTORY(include)
 ADD_SUBDIRECTORY(src)
-ADD_SUBDIRECTORY(tests)
 ADD_SUBDIRECTORY(examples)
 
+ADD_SUBDIRECTORY(googletest)
+ADD_SUBDIRECTORY(tests)
+
 # Add all targets to the build-tree export set
 EXPORT(
     TARGETS tins

tests/CMakeLists.txt

@@ -1,7 +1,12 @@
-FIND_PACKAGE(GTest)
+IF(gtest_BINARY_DIR)
+    MESSAGE(STATUS "Using googletest submodule")
+    SET(GTEST_FOUND true)
+ELSE()
+    FIND_PACKAGE(GTest)
+ENDIF()
 IF(GTEST_FOUND)
-    INCLUDE_DIRECTORIES(${GTEST_INCLUDE_DIRS})
+    INCLUDE_DIRECTORIES(${gtest_INCLUDE_DIRS})
     ADD_SUBDIRECTORY(src)
 ELSE(GTEST_FOUND)
-    MESSAGE(WARNING "Google test not found. Disabling tests.")
+    MESSAGE(WARNING "Google test not found. Tests disabled.")
 ENDIF(GTEST_FOUND)

tests/src/CMakeLists.txt

@@ -1,14 +1,22 @@
 # Use libtins' include directories + test include directories
-INCLUDE_DIRECTORIES(${PROJECT_SOURCE_DIR}/include/tins/ ../include/)
+INCLUDE_DIRECTORIES(
+    ${PROJECT_SOURCE_DIR}/include/tins/ 
+    ../include/
+    ${gtest_SOURCE_DIR}/include
+)
 
 # Find pthread library
 FIND_PACKAGE(Threads REQUIRED)
 
+LINK_DIRECTORIES(
+    ${gtest_BINARY_DIR}
+
+)
 # Link against GoogleTest, libtins and pthread.
 # Pthread is required by GoogleTest
 LINK_LIBRARIES(
-    ${GTEST_LIBRARIES} 
-    ${GTEST_MAIN_LIBRARY} 
+    gtest
+    gtest_main
     tins 
     ${CMAKE_THREAD_LIBS_INIT}
 )