CVI 2009 and C99 variadic macros

[vix]

I've read in the help that "Variable arguments macro" (or variadic macro) is one of the C99 extensions supported in CVI 2009 (since CVI 8.5 if I' right).

So I declared the following variadic macro

#define ERR_MSG(x, ...)    printf(x, ##__VA_ARGS__)

using the ## token to swallow the preceding comma in case the variable-argument list is empty (the ## token is a GCC extension of C99, but also other compilers implement it).

Unfortunately CVI doesn't and I get a compiler error if I call

ERR_MSG("Message");

with an empty variable-argument list.

Would it be possible to implement the ## token also in CVI?

[Mert_A.]

We'll try to implement this for a future release. Thanks for the feedback.

Mert A.

National Instruments