This code confuses me... It's from the c mysql windows dll, libmysql.dll.
size_t (*snprintf)(struct charset_info_st *, char *to, size_t n,
const char *fmt,
...) ATTRIBUTE_FORMAT_FPTR(printf, 4, 5);
#ifndef _my_attribute_h
#define _my_attribute_h
/*
Disable __attribute__() on gcc < 2.7, g++ < 3.4, and non-gcc compilers.
Some forms of __attribute__ are actually supported in earlier versions of
g++, but we just disable them all because we only use them to generate
compilation warnings.
*/
#ifndef __attribute__
# if !defined(__GNUC__)
# define __attribute__(A)
# elif GCC_VERSION < 2008
# define __attribute__(A)
# elif defined(__cplusplus) && GCC_VERSION < 3004
# define __attribute__(A)
# endif
#endif
/*
__attribute__((format(...))) is only supported in gcc >= 2.8 and g++
>= 3.4
But that's already covered by the __attribute__ tests above, so this is
just a convenience macro.
*/
#ifndef ATTRIBUTE_FORMAT
# define ATTRIBUTE_FORMAT(style, m, n) __attribute__((format(style, m, n)))
#endif
/*
__attribute__((format(...))) on a function pointer is not supported
until gcc 3.1
*/
#ifndef ATTRIBUTE_FORMAT_FPTR
# if (GCC_VERSION >= 3001)
# define ATTRIBUTE_FORMAT_FPTR(style, m, n) ATTRIBUTE_FORMAT(style, m, n)
# else
# define ATTRIBUTE_FORMAT_FPTR(style, m, n)
# endif /* GNUC >= 3.1 */
#endif
#endif
