C3193: __clrcall requires /clr or /ZW command line option on boost header

I'm upgrading my boost library from 1.67 to 1.71, but once I build my C++ project I get the following error C3193 on the is_function_cxx_11.hpp 102 row which is

struct is_function : public true_type {};

But I can't even turn on /clr on my project because it has a lot of dependencies as unmanaged code with other projects.

Is there any workaround this problem.? Or I'm supposed to just stay on the 1.67 v at this point?

1 Answer

I added the below in my code before including boost/filesystem..

#ifdef __CLR_VER
#undef __CLR_VER
#endif

I don't understand this much but I think it just invoked the clr for that particular code file.