Is there a way to have the C Preprocessor resolve macros in an #error statement?

Question

Just as the title says. I want to use a preprocessor macro in the text of an #error statement:

#define SOME_MACRO 1

#if SOME_MACRO != 0
    #error \"SOME_MACRO          


        

Answer 1

#define INVALID_MACRO_VALUE2(x) 
#define INVALID_MACRO_VALUE(x) INVALID_MACRO_VALUE2(x)

#if SOME_MACRO != 0
  #include INVALID_MACRO_VALUE(SOME_MACRO)
#endif

generates "Cannot open include file: 'invalid_macro_value_1': No such file or directory" in Visual Studio 2005 and probably similar messages on other compilers.

This doesn't answer your question directly about using #error, but the result is similar.