Sheng Yang wrote:
> printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008
> Fabrice
> Bellard\n"
> "usage: qemu-img command [command options]\n"
> "QEMU disk image utility\n"
> "\n"
> "Command syntax:\n"
> #define DEF(option, callback, arg_string) \
> " " arg_string "\n"
> #include "qemu-img-cmds.h"
> #undef DEF
> #undef GEN_DOCS
> ....
>
> Seems gcc take "printf" as a marco. I added a "#undef printf" before the
> line,
> then it works...
>
> So any clue on what's happened and how to fix?
You can't have preprocessor directives inside the arguments of a macro
call. Yes it's occasionally annoying like this.
You can prevent the macro call without #undef by writing:
(printf)("qemu-img version " ...etc)
I'm not sure if Glibc is compliant with ISO C by
making printf into a macro that takes arguments.
Certain functions such as putchar() are specified as being allowed to
be macros, which implies the other standard functions aren't.
-- Jamie
