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#include <features.h>
void debug_(int level, const char *file, int line, const char *func,
const char *fmt, ...);
int xwrite(const char *, size_t);
int xwrites(const char *);
int xwritehexi(int);
int xwritehexl(long);
int xwritec(char);
int xwritecr(void);
int xwritedump(void *, long, int);
int xinfdump(long, void *, int);
# define debug(level, expr...) debug_(level, __FILE__, __LINE__, DEBUG_FUNCTION, expr)
/* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'
which contains the name of the function currently being defined.
This is broken in G++ before version 2.6.
C9x has a similar variable called __func__, but prefer the GCC one since
it demangles C++ function names. */
# if __GNUC_PREREQ (2, 4)
# define DEBUG_FUNCTION __PRETTY_FUNCTION__
# else
# if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
# define DEBUG_FUNCTION __func__
# else
# define DEBUG_FUNCTION ((__const char *) 0)
# endif
# endif
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