2 * PostgreSQL configuration-settings file.
4 * pg_config.h.in is processed by configure to produce pg_config.h.
6 * If you want to modify any of the tweakable settings in Part 2
7 * of this file, you can do it in pg_config.h.in before running configure,
8 * or in pg_config.h afterwards. Of course, if you edit pg_config.h, then your
9 * changes will be overwritten the next time you run configure.
11 * $Id: pg_config.h.in,v 1.42 2003/03/29 11:31:51 petere Exp $
19 *------------------------------------------------------------------------
20 * Part 1: feature symbols and limits that are set by configure based on
21 * user-supplied switches. This is first so that stuff in Part 2 can
22 * depend on these values.
24 * Beware of "fixing" configure-time mistakes by editing these values,
25 * since configure may have inserted the settings in other files as well
26 * as here. Best to rerun configure if you forgot --enable-integer-datetimes
28 *------------------------------------------------------------------------
31 /* The version number is actually hard-coded into configure.in */
33 /* A canonical string containing the version number, platform, and C compiler */
36 /* Set to 1 if you want 64-bit integer timestamp and interval support (--enable-integer-datetimes) */
37 #undef USE_INTEGER_DATETIMES
39 /* Set to 1 if you want single-byte recode (--enable-recode) */
42 /* Set to 1 if you want ASSERT checking (--enable-cassert) */
43 #undef USE_ASSERT_CHECKING
45 /* Define to build with Kerberos 4 support (--with-krb4[=DIR]) */
48 /* Define to build with Kerberos 5 support (--with-krb5[=DIR]) */
51 /* Kerberos name of the Postgres service principal (--with-krb-srvnam=NAME) */
54 /* Define to build with (Open)SSL support (--with-openssl[=DIR]) */
57 /* Define to build with PAM Support */
61 * DEF_PGPORT is the TCP port number on which the Postmaster listens and
62 * which clients will try to connect to. This is just a default value;
63 * it can be overridden at postmaster or client startup. It's awfully
64 * convenient if your clients have the right default compiled in, though.
65 * (--with-pgport=PORTNUM)
68 /* ... and once more as a string constant instead */
72 * Default soft limit on number of backend server processes per postmaster;
73 * this is just the default setting for the postmaster's -N switch.
74 * (--with-maxbackends=N)
76 #undef DEF_MAXBACKENDS
81 /* location of locale files */
86 *------------------------------------------------------------------------
87 * Part 2: feature symbols and limits that are user-configurable, but
88 * only by editing this file ... there's no configure support for them.
90 * Editing this file and doing a full rebuild (and an initdb if noted)
91 * should be sufficient to change any of these.
92 *------------------------------------------------------------------------
96 * Default number of buffers in shared buffer pool (each of size BLCKSZ).
97 * This is just the default setting for the postmaster's -B switch.
98 * Perhaps it ought to be configurable from a configure switch.
99 * NOTE: default setting corresponds to the minimum number of buffers
100 * that postmaster.c will allow for the default MaxBackends value.
102 #define DEF_NBUFFERS (DEF_MAXBACKENDS > 8 ? DEF_MAXBACKENDS * 2 : 16)
105 * Size of a disk block --- this also limits the size of a tuple.
106 * You can set it bigger if you need bigger tuples (although TOAST
107 * should reduce the need to have large tuples, since fields can now
108 * be spread across multiple tuples).
110 * BLCKSZ must be a power of 2.
111 * The maximum possible value of BLCKSZ is currently 2^15 (32768).
112 * This is determined by the 15-bit widths of the lp_off and lp_len
113 * fields in ItemIdData (see include/storage/itemid.h).
115 * CAUTION: changing BLCKSZ requires an initdb.
120 * RELSEG_SIZE is the maximum number of blocks allowed in one disk file.
121 * Thus, the maximum size of a single file is RELSEG_SIZE * BLCKSZ;
122 * relations bigger than that are divided into multiple files.
124 * CAUTION: RELSEG_SIZE * BLCKSZ must be less than your OS' limit on file
125 * size. This is typically 2Gb or 4Gb in a 32-bit operating system. By
126 * default, we make the limit 1Gb to avoid any possible integer-overflow
127 * problems within the OS. A limit smaller than necessary only means we
128 * divide a large relation into more chunks than necessary, so it seems
129 * best to err in the direction of a small limit. (Besides, a power-of-2
130 * value saves a few cycles in md.c.)
132 * CAUTION: changing RELSEG_SIZE requires an initdb.
134 #define RELSEG_SIZE (0x40000000 / BLCKSZ)
137 * Maximum number of columns in an index and maximum number of arguments
138 * to a function. They must be the same value.
140 * The minimum value is 8 (index creation uses 8-argument functions).
141 * There is no specific upper limit, although large values will waste
142 * system-table space and processing time.
144 * CAUTION: changing these requires an initdb.
146 * BTW: if you need to call dynamically-loaded old-style C functions that
147 * have more than 16 arguments, you will also need to add cases to the
148 * switch statement in fmgr_oldstyle() in src/backend/utils/fmgr/fmgr.c.
149 * But consider converting such functions to new-style instead...
151 #define INDEX_MAX_KEYS 32
152 #define FUNC_MAX_ARGS INDEX_MAX_KEYS
155 * Define this to make libpgtcl's "pg_result -assign" command process C-style
156 * backslash sequences in returned tuple data and convert Postgres array
157 * attributes into Tcl lists. CAUTION: this conversion is *wrong* unless
158 * you install the routines in contrib/string/string_io to make the backend
159 * produce C-style backslash sequences in the first place.
161 /* #define TCL_ARRAYS */
164 * User locks are handled totally on the application side as long term
165 * cooperative locks which extend beyond the normal transaction boundaries.
166 * Their purpose is to indicate to an application that someone is `working'
167 * on an item. Define this flag to enable user locks. You will need the
168 * loadable module user-locks.c to use this feature.
173 * Define this if you want psql to _always_ ask for a username and a password
174 * for password authentication.
176 /* #define PSQL_ALWAYS_GET_PASSWORDS */
179 * Define this if you want to allow the lo_import and lo_export SQL functions
180 * to be executed by ordinary users. By default these functions are only
181 * available to the Postgres superuser. CAUTION: these functions are
182 * SECURITY HOLES since they can read and write any file that the Postgres
183 * backend has permission to access. If you turn this on, don't say we
186 /* #define ALLOW_DANGEROUS_LO_FUNCTIONS */
189 * MAXPGPATH: standard size of a pathname buffer in Postgres (hence,
190 * maximum usable pathname length is one less).
192 * We'd use a standard system header symbol for this, if there weren't
193 * so many to choose from: MAXPATHLEN, _POSIX_PATH_MAX, MAX_PATH, PATH_MAX
194 * are all defined by different "standards", and often have different
195 * values on the same platform! So we just punt and use a reasonably
196 * generous setting here.
198 #define MAXPGPATH 1024
201 * DEFAULT_MAX_EXPR_DEPTH: default value of max_expr_depth SET variable.
203 #define DEFAULT_MAX_EXPR_DEPTH 10000
206 * PG_SOMAXCONN: maximum accept-queue length limit passed to listen(2).
207 * You'd think we should use SOMAXCONN from <sys/socket.h>, but on many
208 * systems that symbol is much smaller than the kernel's actual limit.
209 * In any case, this symbol need be twiddled only if you have a kernel
210 * that refuses large limit values, rather than silently reducing the
211 * value to what it can handle (which is what most if not all Unixen do).
213 #define PG_SOMAXCONN 10000
216 * You can try changing this if you have a machine with bytes of another
217 * size, but no guarantee...
219 #define BITS_PER_BYTE 8
222 * Define this if your operating system supports AF_UNIX family sockets.
224 #if !defined(__QNX__) && !defined(__BEOS__)
225 # define HAVE_UNIX_SOCKETS 1
229 * This is the default directory in which AF_UNIX socket files are placed.
230 * Caution: changing this risks breaking your existing client applications,
231 * which are likely to continue to look in the old directory. But if you
232 * just hate the idea of sockets in /tmp, here's where to twiddle it.
233 * You can also override this at runtime with the postmaster's -k switch.
235 #define DEFAULT_PGSOCKET_DIR "/tmp"
239 *------------------------------------------------------------------------
240 * These hand-configurable symbols are for enabling debugging code,
241 * not for controlling user-visible features or resource limits.
242 *------------------------------------------------------------------------
245 /* Define this to cause pfree()'d memory to be cleared immediately,
246 * to facilitate catching bugs that refer to already-freed values.
247 * XXX For 7.1 development, define this automatically if --enable-cassert.
248 * In the long term it probably doesn't need to be on by default.
250 #ifdef USE_ASSERT_CHECKING
251 #define CLOBBER_FREED_MEMORY
254 /* Define this to check memory allocation errors (scribbling on more
255 * bytes than were allocated).
256 * XXX For 7.1 development, define this automatically if --enable-cassert.
257 * In the long term it probably doesn't need to be on by default.
259 #ifdef USE_ASSERT_CHECKING
260 #define MEMORY_CONTEXT_CHECKING
263 /* Define this to force all parse and plan trees to be passed through
264 * copyObject(), to facilitate catching errors and omissions in copyObject().
266 /* #define COPY_PARSE_PLAN_TREES */
268 /* Enable debugging print statements for lock-related operations. */
269 /* #define LOCK_DEBUG */
272 * Other debug #defines (documentation, anyone?)
274 /* #define IPORTAL_DEBUG */
275 /* #define HEAPDEBUGALL */
276 /* #define ISTRATDEBUG */
277 /* #define ACLDEBUG */
278 /* #define RTDEBUG */
279 /* #define GISTDEBUG */
282 * defining unsafe floats will make float4 and float8 ops faster
283 * by suppressing overflow/underflow checks.
285 /* #define UNSAFE_FLOATS */
289 *------------------------------------------------------------------------
290 * Part 3: system configuration information that is auto-detected by
291 * configure. In theory you shouldn't have to touch any of this stuff
292 * by hand. In the real world, configure might get it wrong...
293 *------------------------------------------------------------------------
296 /* Define const as empty if your compiler doesn't grok const. */
299 /* Define as your compiler's spelling of "inline", or empty if no inline. */
302 /* Define as empty if the C compiler doesn't understand "signed". */
305 /* Define as empty if the C compiler doesn't understand "volatile". */
308 /* Define to 1 to make fseeko visible on some hosts. */
309 #undef _LARGEFILE_SOURCE
311 /* Define for large files, on AIX-style hosts. */
314 /* Number of bits in a file offset, on hosts where this is settable. */
315 #undef _FILE_OFFSET_BITS
317 /* Define to 1 if fseeko (and presumably ftello) exists and is declared. */
320 /* Define if your cpp understands the ANSI stringizing operators in macros */
321 #undef HAVE_STRINGIZE
323 /* Set to 1 if you have <crypt.h> */
326 /* Set to 1 if you have <dld.h> */
329 /* Set to 1 if you have <endian.h> */
332 /* Set to 1 if you have <fp_class.h> */
333 #undef HAVE_FP_CLASS_H
335 /* Set to 1 if you have <getopt.h> */
338 /* Set to 1 if you have <history.h> */
339 #undef HAVE_HISTORY_H
341 /* Set to 1 if you have <ieeefp.h> */
344 /* Set to 1 if you have <poll.h> */
347 /* Set to 1 if you have <sys/poll.h> */
348 #undef HAVE_SYS_POLL_H
350 /* Set to 1 if you have <netinet/tcp.h> */
351 #undef HAVE_NETINET_TCP_H
353 /* Set to 1 if you have <pam/pam_appl.h> */
354 #undef HAVE_PAM_PAM_APPL_H
356 /* Set to 1 if you have <readline.h> */
357 #undef HAVE_READLINE_H
359 /* Set to 1 if you have <readline/history.h> */
360 #undef HAVE_READLINE_HISTORY_H
362 /* Set to 1 if you have <readline/readline.h> */
363 #undef HAVE_READLINE_READLINE_H
365 /* Set to 1 if you have <editline/history.h> */
366 #undef HAVE_EDITLINE_HISTORY_H
368 /* Set to 1 if you have <editline/readline.h> */
369 #undef HAVE_EDITLINE_READLINE_H
371 /* Set to 1 if you have <security/pam_appl.h> */
372 #undef HAVE_SECURITY_PAM_APPL_H
374 /* Set to 1 if you have <sys/ipc.h> */
375 #undef HAVE_SYS_IPC_H
377 /* Set to 1 if you have <sys/select.h> */
378 #undef HAVE_SYS_SELECT_H
380 /* Set to 1 if you have <sys/un.h> */
383 /* Set to 1 if you have <sys/sem.h> */
384 #undef HAVE_SYS_SEM_H
386 /* Set to 1 if you have <sys/shm.h> */
387 #undef HAVE_SYS_SHM_H
389 /* Set to 1 if you have support for IPv6 */
392 /* Set to 1 if you have <kernel/OS.h> */
393 #undef HAVE_KERNEL_OS_H
395 /* Set to 1 if you have <SupportDefs.h> */
396 #undef HAVE_SUPPORTDEFS_H
398 /* Set to 1 if you have <kernel/image.h> */
399 #undef HAVE_KERNEL_IMAGE_H
401 /* Set to 1 if you have <termios.h> */
402 #undef HAVE_TERMIOS_H
404 /* Set to 1 if you have <utime.h> */
407 /* Set to 1 if you have <sys/pstat.h> */
408 #undef HAVE_SYS_PSTAT_H
410 /* Define to 1 if you have strings.h */
411 #undef HAVE_STRINGS_H
413 /* Define if you have the setproctitle function. */
414 #undef HAVE_SETPROCTITLE
416 /* Define if you have the pstat function. */
419 /* Define if the PS_STRINGS thing exists. */
420 #undef HAVE_PS_STRINGS
422 /* Define if you have the stricmp function. */
425 /* Set to 1 if you have <pwd.h> */
428 /* Set to 1 if you have gettimeofday(a) instead of gettimeofday(a,b) */
429 #undef GETTIMEOFDAY_1ARG
431 #ifdef GETTIMEOFDAY_1ARG
432 # define gettimeofday(a,b) gettimeofday(a)
435 /* Set to 1 if you have snprintf() in the C library */
438 /* Set to 1 if your standard system headers declare snprintf() */
439 #undef HAVE_DECL_SNPRINTF
441 /* Set to 1 if you have vsnprintf() in the C library */
442 #undef HAVE_VSNPRINTF
444 /* Set to 1 if your standard system headers declare vsnprintf() */
445 #undef HAVE_DECL_VSNPRINTF
447 /* Set to 1 if you have strerror() */
450 /* Set to 1 if you have isinf() */
454 * These are all related to port/isinf.c
458 #undef HAVE_FP_CLASS_H
459 #undef HAVE_FP_CLASS_D
462 /* Set to 1 if you have getaddrinfo() */
463 #undef HAVE_GETADDRINFO
465 /* Set to 1 if you have gethostname() */
466 #undef HAVE_GETHOSTNAME
468 /* Set to 1 if struct tm has a tm_zone member */
471 /* Set to 1 if you have int timezone.
472 * NOTE: if both tm_zone and a global timezone variable exist,
473 * using the tm_zone field should probably be preferred,
474 * since global variables are inherently not thread-safe.
476 #undef HAVE_INT_TIMEZONE
478 /* Set to 1 if you have cbrt() */
481 /* Set to 1 if you have inet_aton() */
482 #undef HAVE_INET_ATON
484 /* Set to 1 if you have fcvt() */
487 /* Set to 1 if you have rint() */
490 /* Set to 1 if you have finite() */
493 /* Set to 1 if you have memmove() */
496 /* Set to 1 if you have sigsetjmp() */
497 #undef HAVE_SIGSETJMP
499 /* Set to 1 if you have sysconf() */
502 /* Set to 1 if you have getrusage() */
503 #undef HAVE_GETRUSAGE
505 /* Set to 1 if you have waitpid() */
508 /* Set to 1 if you have setsid() */
511 /* Set to 1 if you have sigprocmask() */
512 #undef HAVE_SIGPROCMASK
514 /* Set to 1 if you have sigprocmask() */
515 #undef HAVE_STRCASECMP
517 /* Set to 1 if you have strtol() */
520 /* Set to 1 if you have strtoul() */
523 /* Set to 1 if you have strdup() */
526 /* Set to 1 if you have random() */
529 /* Set to 1 if you have srandom() */
532 /* The random() function is expected to yield values 0 .. MAX_RANDOM_VALUE */
533 /* Currently, all known implementations yield 0..2^31-1, so we just hardwire
534 * this constant. We could do a configure test if it proves to be necessary.
535 * CAUTION: Think not to replace this with RAND_MAX. RAND_MAX defines the
536 * maximum value of the older rand() function, which is often different from
537 * --- and considerably inferior to --- random().
539 #define MAX_RANDOM_VALUE (0x7FFFFFFF)
541 /* Define if you have dlopen() */
544 /* Define if you have fdatasync() */
545 #undef HAVE_FDATASYNC
547 /* Define if you have utime() */
550 /* Define if you have utimes() */
553 /* Define if the standard header unistd.h declares fdatasync() */
554 #undef HAVE_DECL_FDATASYNC
556 /* Set to 1 if you have libz.a */
559 /* Set to 1 if you have libreadline.a */
560 #undef HAVE_LIBREADLINE
562 /* Set to 1 if your libreadline defines rl_completion_append_character */
563 #undef HAVE_RL_COMPLETION_APPEND_CHARACTER
565 /* Set to 1 if you have rl_completion_matches */
566 #undef HAVE_RL_COMPLETION_MATCHES
568 /* Set to 1 if you have rl_filename_completion_function */
569 #undef HAVE_RL_FILENAME_COMPLETION_FUNCTION
571 /* Set to 1 if you have replace_history_entry */
572 #undef HAVE_REPLACE_HISTORY_ENTRY
574 /* Set to 1 if you have getopt_long() (GNU long options) */
575 #undef HAVE_GETOPT_LONG
577 /* Set to 1 if you have union semun */
578 #undef HAVE_UNION_SEMUN
580 /* Set to 1 if you have struct cmsgcred */
581 #undef HAVE_STRUCT_CMSGCRED
583 /* Set to 1 if you have struct fcred */
584 #undef HAVE_STRUCT_FCRED
586 /* Set to 1 if you have struct sockcred */
587 #undef HAVE_STRUCT_SOCKCRED
589 /* Set to 1 if you have struct sockaddr_un */
590 #undef HAVE_STRUCT_SOCKADDR_UN
592 /* Set to 1 if you have krb5_ticket.enc_part2 */
593 #undef HAVE_KRB5_TICKET_ENC_PART2
595 /* Set to 1 if you have krb5_ticket.client */
596 #undef HAVE_KRB5_TICKET_CLIENT
598 /* Set to 1 if you have krb5_error.text.data */
599 #undef HAVE_KRB5_ERROR_TEXT_DATA
601 /* Set to 1 if you have krb5_ticket.e_data */
602 #undef HAVE_KRB5_ERROR_E_DATA
604 /* Set to 1 if type "long int" works and is 64 bits */
605 #undef HAVE_LONG_INT_64
607 /* Set to 1 if type "long long int" works and is 64 bits */
608 #undef HAVE_LONG_LONG_INT_64
610 /* Set to 1 if type "long long int" constants should be suffixed by LL */
611 #undef HAVE_LL_CONSTANTS
613 /* Define this as the appropriate snprintf format for 64-bit ints, if any */
617 * We need a #define symbol for sizeof(Datum) for use in some #if tests.
622 * These must be defined as the alignment requirement (NOT the size) of
623 * each of the basic C data types (except char, which we assume has align 1).
624 * MAXIMUM_ALIGNOF is the largest alignment requirement for any C data type.
625 * ALIGNOF_LONG_LONG_INT need only be defined if HAVE_LONG_LONG_INT_64 is.
630 #undef ALIGNOF_LONG_LONG_INT
631 #undef ALIGNOF_DOUBLE
632 #undef MAXIMUM_ALIGNOF
634 /* Define as the type of the 3rd argument to accept() */
635 #undef ACCEPT_TYPE_ARG3
637 /* Define if POSIX signal interface is available */
638 #undef HAVE_POSIX_SIGNALS
640 /* Define if you have the optreset variable */
641 #undef HAVE_INT_OPTRESET
643 /* Define if you have strtoll() */
646 /* Define if you have strtoq() */
649 /* Define if you have strtoull() */
652 /* Define if you have strtouq() */
655 /* Define if you have atexit() */
658 /* Define if you have on_exit() */
661 /* Define if you have syslog() */
664 /* Define if you have poll() */
667 /* Define if the corresponding types are defined in standard headers */
672 #undef HAVE_SIG_ATOMIC_T
674 /* Define exactly one of these symbols to select semaphore implementation */
675 #undef USE_NAMED_POSIX_SEMAPHORES
676 #undef USE_UNNAMED_POSIX_SEMAPHORES
677 #undef USE_SYSV_SEMAPHORES
679 /* Define exactly one of these symbols to select shared-mem implementation */
680 #undef USE_SYSV_SHARED_MEMORY
684 *------------------------------------------------------------------------
685 * Part 4: pull in system-specific declarations.
687 * This is still configure's responsibility, because it picks where
688 * the "pg_config_os.h" symlink points...
689 *------------------------------------------------------------------------
693 * Pull in OS-specific declarations (using link created by configure)
696 #include "pg_config_os.h"
700 *------------------------------------------------------------------------
701 * Part 5: provide default declarations for various things that should be
702 * provided by the system headers or the port-specific pg_config_os.h file,
703 * but sometimes aren't.
705 * This must be last so that pg_config_os.h can override the defaults.
706 * In particular, we must not pull in any system header files until we
707 * have read pg_config_os.h (largefile support tends to break otherwise).
708 *------------------------------------------------------------------------
712 #define DLLIMPORT /* no special DLL markers on most ports */
716 * The following is used as the arg list for signal handlers. Any ports
717 * that take something other than an int argument should override this in
718 * their pg_config_os.h file. Note that variable names are required
719 * because it is used in both the prototypes as well as the definitions.
720 * Note also the long name. We expect that this won't collide with
721 * other names causing compiler warnings.
725 #define SIGNAL_ARGS int postgres_signal_arg
729 * Default "extern" declarations or macro substitutes for library routines.
730 * When necessary, these routines are provided by files in src/port/.
733 #define fseeko(a, b, c) fseek((a), (b), (c))
734 #define ftello(a) ftell((a))
738 extern int isinf(double x);
741 #ifndef HAVE_GETHOSTNAME
742 extern int gethostname(char *name, int namelen);
745 #ifndef HAVE_INET_ATON
746 # include <sys/types.h>
747 # include <netinet/in.h>
748 # include <arpa/inet.h>
749 extern int inet_aton(const char *cp, struct in_addr * addr);
753 * When there is no sigsetjmp, its functionality is provided by plain
754 * setjmp. Incidentally, nothing provides setjmp's functionality in
757 #ifndef HAVE_SIGSETJMP
758 # define sigjmp_buf jmp_buf
759 # define sigsetjmp(x,y) setjmp(x)
760 # define siglongjmp longjmp
763 #ifndef HAVE_STRCASECMP
764 extern int strcasecmp(char *s1, char *s2);
768 extern char *strdup(char const *);
772 extern long random(void);
776 extern void srandom(unsigned int seed);
779 #if defined(HAVE_FDATASYNC) && !HAVE_DECL_FDATASYNC
780 extern int fdatasync(int fildes);
783 /* If strtoq() exists, rename it to the more standard strtoll() */
784 #if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOLL) && defined(HAVE_STRTOQ)
785 # define strtoll strtoq
786 # define HAVE_STRTOLL 1
789 /* If strtouq() exists, rename it to the more standard strtoull() */
790 #if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOULL) && defined(HAVE_STRTOUQ)
791 # define strtoull strtouq
792 # define HAVE_STRTOULL 1
796 #endif /* PG_CONFIG_H */