Default to C++11

CMakeLists.txt

@@ -21,8 +21,8 @@ set(OVM_ENABLE_UNITTESTS ${OVM_STANDALONE_BUILD} CACHE BOOL "Build OpenVolumeMes
 set(OVM_ENABLE_EXAMPLES ${OVM_STANDALONE_BUILD} CACHE BOOL "Build OpenVolumeMesh examples")
 set(OVM_BUILD_DOCUMENTATION ${OVM_STANDALONE_BUILD} CACHE BOOL "Build OpenVolumeMesh documentation")
 
-set(OVM_CXX_VERSION 14 CACHE STRING "C++ version to use")
-set_property(CACHE OVM_CXX_VERSION PROPERTY STRINGS 14 17 20)
+set(OVM_CXX_VERSION 11 CACHE STRING "C++ version to use")
+set_property(CACHE OVM_CXX_VERSION PROPERTY STRINGS 11 14 17 20)
 
 if (OVM_STANDALONE_BUILD)
     set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/Build/bin")