1 files changed, 60 insertions, 0 deletions
diff --git a/CheckCXX11SharedPtr.cmake b/CheckCXX11SharedPtr.cmake
new file mode 100644
index 0000000..24dc871
--- /dev/null
+++ b/CheckCXX11SharedPtr.cmake
@@ -0,0 +1,60 @@
+cmake_minimum_required(VERSION 2.8.3)
+
+if (ENTITYX_USE_CPP11_STDLIB)
+    add_definitions(-DGTEST_USE_OWN_TR1_TUPLE=1)
+    set(OLD_CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
+    check_cxx_source_compiles(
+    "
+    #include <memory>
+
+    int main() {
+        std::shared_ptr<int>();
+    }
+    "
+    ENTITYX_HAVE_CXX11_STDLIB
+    )
+
+    if (NOT ENTITYX_HAVE_CXX11_STDLIB)
+        message("-- Not using -stdlib=libc++ (test failed to build)")
+        set(CMAKE_CXX_FLAGS "${OLD_CMAKE_CXX_FLAGS}")
+    else ()
+        message("-- Using -stdlib=libc++")
+    endif ()
+else ()
+    message("-- Using default stdlib (try -DENTITYX_USE_CPP11_STDLIB=1 to use -stdlib=libc++)")
+endif ()
+
+check_cxx_source_compiles(
+"
+#include <memory>
+
+int main() { std::shared_ptr<int>(); }
+"
+ENTITYX_HAVE_STD_SHARED_PTR
+)
+
+check_cxx_source_compiles(
+"
+#include <boost/shared_ptr.hpp>
+
+int main() { boost::shared_ptr<int>(); }
+"
+ENTITYX_HAVE_BOOST_SHARED_PTR
+)
+
+if (ENTITYX_HAVE_STD_SHARED_PTR AND ENTITYX_USE_STD_SHARED_PTR)
+    message("-- Using std::shared_ptr<T>")
+else()
+    if (ENTITYX_USE_STD_SHARED_PTR)
+        message("-- Using boost::shared_ptr<T> (std::shared_ptr<T> could not be used)")
+    else()
+        message("-- Using boost::shared_ptr<T> (try -DENTITYX_USE_STD_SHARED_PTR=1 to use std::shared_ptr<T>)")
+    endif()
+endif()
+
+configure_file(
+    ${CMAKE_CURRENT_SOURCE_DIR}/entityx/config.h.in
+    ${CMAKE_CURRENT_SOURCE_DIR}/entityx/config.h
+)
+