For debugbuilds, I usually use Clang, as it formats warnings and errors better, and makes it a little easier to track them down, and fix them.
But recently after adding a Macro with variadic arguments, Clang told me the following (from a dummy project):
main.cpp:5:20: warning: named variadic macros are a GNU extension [-Wvariadic-macros]
#define stuff3(args...) stuff_i(args)
I know that macroname(args...) compiles fine in a wide range of compilers, including Visualstudio, Sunstudio, and of course GCC. But just to make sure that clang is right, I tried two other ways of expanding the variadic arguments:
Number 1:
#define stuff1(...) stuff_i(...)
Number 2:
#define stuff2(...) stuff_i(__VA_ARGS__)
On both I receive this message:
main.cpp:3:16: warning: variadic macros were introduced in C99 [-Wvariadic-macros]
... Which makes me wonder if Variadic macros are actually part of the standard of C++ (and of course I know that the Preprocessor is interpreted independently)?