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[Qemu-devel] Re: [PATCH 1/5] HACKING: add preprocessor rules
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From: |
Andreas Schwab |
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Subject: |
[Qemu-devel] Re: [PATCH 1/5] HACKING: add preprocessor rules |
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Date: |
Sun, 15 Aug 2010 23:27:12 +0200 |
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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.
--
Andreas Schwab, address@hidden
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"And now for something completely different."