Fix c++11 compilation on cmake < 3.1

The compiler-agnostic CXX_STANDARD feature was added in cmake 3.1.
MethodicalAcceleratorDesign · Aug 1, 2018 · e2d51eb · e2d51eb
1 parent 8162356
commit e2d51eb
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -57,8 +57,12 @@ set_target_properties(madx PROPERTIES LINKER_LANGUAGE Fortran)
 
 # set library version:
 set_target_properties(madx     PROPERTIES VERSION ${MADX_VERSION})
-set_target_properties(madx     PROPERTIES CXX_STANDARD 11)
 
+if (${CMAKE_VERSION} VERSION_LESS "3.1")
+  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+else()
+  set_target_properties(madx   PROPERTIES CXX_STANDARD 11)
+endif()
 
 # adding an executable:
 if(MADX_BUNDLE)