make sure __cplusplus is defined under msvc

5 years ago · 8f4efe57a2
parent 0613dbc4a2
commit 8f4efe57a2
1 changed files with 5 additions and 0 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -30,6 +30,11 @@ if(NOT CMAKE_CXX_STANDARD)
    set(CMAKE_CXX_STANDARD_REQUIRED ON)
 endif()

+# make sure __cplusplus is defined under msvc
+if(MSVC)
+    string(APPEND CMAKE_CXX_FLAGS " /Zc:__cplusplus")
+endif()
+
 set(CMAKE_CXX_EXTENSIONS OFF)

 if(CMAKE_SYSTEM_NAME MATCHES "CYGWIN" OR CMAKE_SYSTEM_NAME MATCHES "MSYS")