Fix compile error when use msvc 2019 (#754)

See https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
4 years ago · aca02d209b
1 changed files with 1 additions and 0 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -45,6 +45,7 @@ if(MSVC)
    /wd4800
    /wd4068 # Disable unknown pragma warning
    /std:c++17
+    /Zc:__cplusplus
    $<$<CONFIG:Debug>:/FS>
  )
  # relink system libs