src/cmd/mpm/misc.cc - plan9 - Git at Google

 #include	"misc.h"

 char	errbuf[200];
 char	*progname;
 int	wantwarn = 0;

 int	dbg	= 0;
 // dbg = 1 : dump slugs
 // dbg = 2 : dump ranges
 // dbg = 4 : report function entry
 // dbg = 8 : follow queue progress
 // dbg = 16: follow page fill progress
	#include "misc.h"

	char errbuf[200];
	char *progname;
	int wantwarn = 0;

	int dbg = 0;
	// dbg = 1 : dump slugs
	// dbg = 2 : dump ranges
	// dbg = 4 : report function entry
	// dbg = 8 : follow queue progress
	// dbg = 16: follow page fill progress