#warning in Visual Studio

Question

In gcc I can do compile-time warnings like this:

#if !defined(_SOME_FEATURE_)
   #warning _SOME_FEATURE_ not defined-- be careful!
#endif

But in Visual Studio this doesn't work. Is there an alternative syntax for #warning?

Answer 1

#pragma WEIRD_VALUES_HERE

is the way I've always seen it done. M$ probably has the pragmas on their site somewhere.

Answer 2

About the closest equivalent would be #pragma message, or possibly #error (the latter stops compilation, the former just prints out the specified error message).

Answer 3

Use #pragma message("Some message")

Answer 4

Another thought is template style compile time asserts. Boost has a whole selection of these if you are wanting to check compile time code errors.