pollution: itimerval
struct itimerval { struct timeval it_interval; struct timeval it_value; }; 

pollution: itimerval
pollution: getitimer
int getitimer(int, struct itimerval *); 

pollution: gettimeofday
int gettimeofday(struct timeval * restrict, void * restrict); 

pollution: itimerval
pollution: itimerval
pollution: setitimer
int setitimer(int, const struct itimerval * restrict, struct itimerval * restrict); 

pollution: ITIMER_PROF
#define ITIMER_PROF 2

pollution: ITIMER_REAL
#define ITIMER_REAL 0

pollution: ITIMER_VIRTUAL
#define ITIMER_VIRTUAL 1

pollution: TARGET_IPHONE_SIMULATOR
#define TARGET_IPHONE_SIMULATOR 0

pollution: TARGET_OS_ARROW
#define TARGET_OS_ARROW 1

pollution: TARGET_OS_BRIDGE
#define TARGET_OS_BRIDGE 0

pollution: TARGET_OS_DRIVERKIT
#define TARGET_OS_DRIVERKIT 0

pollution: TARGET_OS_EMBEDDED
#define TARGET_OS_EMBEDDED 0

pollution: TARGET_OS_IOS
#define TARGET_OS_IOS 0

pollution: TARGET_OS_IOSMAC
#define TARGET_OS_IOSMAC 0

pollution: TARGET_OS_IPHONE
#define TARGET_OS_IPHONE 0

pollution: TARGET_OS_LINUX
#define TARGET_OS_LINUX 0

pollution: TARGET_OS_MAC
#define TARGET_OS_MAC 1

pollution: TARGET_OS_MACCATALYST
#define TARGET_OS_MACCATALYST 0

pollution: TARGET_OS_NANO
#define TARGET_OS_NANO 0

pollution: TARGET_OS_OSX
#define TARGET_OS_OSX 1

pollution: TARGET_OS_SIMULATOR
#define TARGET_OS_SIMULATOR 0

pollution: TARGET_OS_TV
#define TARGET_OS_TV 0

pollution: TARGET_OS_UIKITFORMAC
#define TARGET_OS_UIKITFORMAC 0

pollution: TARGET_OS_UNIX
#define TARGET_OS_UNIX 0

pollution: TARGET_OS_VISION
#define TARGET_OS_VISION 0

pollution: TARGET_OS_WATCH
#define TARGET_OS_WATCH 0

pollution: TARGET_OS_WIN32
#define TARGET_OS_WIN32 0

pollution: TARGET_OS_WINDOWS
#define TARGET_OS_WINDOWS 0

pollution: TARGET_OS_XR
#define TARGET_OS_XR 0