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postgres/src/include/port/linux.h

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/* __USE_POSIX, __USE_BSD, and __USE_BSD_SIGNAL used to be defined either
here or with -D compile options, but __ macros should be set and used by C
library macros, not Postgres code. __USE_POSIX is set by features.h,
__USE_BSD is set by bsd/signal.h, and __USE_BSD_SIGNAL appears not to
be used.
*/
#define JMP_BUF
#define USE_POSIX_TIME
#define HAS_TEST_AND_SET
#if defined(PPC)
typedef unsigned int slock_t;
#elif defined(__alpha)
typedef long int slock_t;
#else /* i386 probably */
typedef unsigned char slock_t;
#endif
#if (__GLIBC__ >= 2)
#ifdef HAVE_INT_TIMEZONE
#undef HAVE_INT_TIMEZONE
#endif
/*
* currently undefined as I (teunis@computersupportcentre.com) have not
* checked this yet
*/
/* #define HAVE_SIGSETJMP 1 */
#endif
#if defined(PPC)
#undef HAVE_INT_TIMEZONE
#endif