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[Qemu-devel] Re: [PATCH 1/5] HACKING: add preprocessor rules

From: Andreas Schwab
Subject: [Qemu-devel] Re: [PATCH 1/5] HACKING: add preprocessor rules
Date: Sun, 15 Aug 2010 23:27:12 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux)

Blue Swirl <address@hidden> writes:

> +For variadic macros, stick with C99 syntax:
> +
> +#define DPRINTF(fmt, ...)                                       \
> +    do { printf("IRQ: " fmt, ## __VA_ARGS__); } while (0)

That's not C99 syntax, the combination with ## is a gcc extension.  In
C99 you cannot have an empty __VA_ARGS__.


Andreas Schwab, address@hidden
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