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 1.6 2001/09/14 10:36:52 ishii 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-multibyte
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 LOCALE support (--enable-locale) */
39 /* Set to 1 if you want cyrillic recode (--enable-recode) */
42 /* Set to 1 if you want to use multibyte characters (--enable-multibyte) */
46 /* --enable-multibyte implies UNICODE_CONVERSION */
47 #define UNICODE_CONVERSION
50 /* Set to 1 if you want ASSERT checking (--enable-cassert) */
51 #undef USE_ASSERT_CHECKING
53 /* Set to 1 to use syslog() to write postmaster log (--enable-syslog) */
56 /* Define to build with Kerberos 4 support (--with-krb4[=DIR]) */
59 /* Define to build with Kerberos 5 support (--with-krb5[=DIR]) */
62 /* Kerberos name of the Postgres service principal (--with-krb-srvnam=NAME) */
65 /* Define to build with (Open)SSL support (--with-openssl[=DIR]) */
68 /* Define to build with PAM Support */
72 * DEF_PGPORT is the TCP port number on which the Postmaster listens and
73 * which clients will try to connect to. This is just a default value;
74 * it can be overridden at postmaster or client startup. It's awfully
75 * convenient if your clients have the right default compiled in, though.
76 * (--with-pgport=PORTNUM)
79 /* ... and once more as a string constant instead */
83 * Default soft limit on number of backend server processes per postmaster;
84 * this is just the default setting for the postmaster's -N switch.
85 * (--with-maxbackends=N)
87 #undef DEF_MAXBACKENDS
89 /* --enable-pltcl-unknown */
90 #undef ENABLE_PLTCL_UNKNOWN
92 /* --enable-pltcl-utf */
93 #undef ENABLE_PLTCL_UTF
98 /* location of locale files */
102 *------------------------------------------------------------------------
103 * Part 2: feature symbols and limits that are user-configurable, but
104 * only by editing this file ... there's no configure support for them.
106 * Editing this file and doing a full rebuild (and an initdb if noted)
107 * should be sufficient to change any of these.
108 *------------------------------------------------------------------------
112 * Default number of buffers in shared buffer pool (each of size BLCKSZ).
113 * This is just the default setting for the postmaster's -B switch.
114 * Perhaps it ought to be configurable from a configure switch.
115 * NOTE: default setting corresponds to the minimum number of buffers
116 * that postmaster.c will allow for the default MaxBackends value.
118 #define DEF_NBUFFERS (DEF_MAXBACKENDS > 8 ? DEF_MAXBACKENDS * 2 : 16)
121 * Size of a disk block --- this also limits the size of a tuple.
122 * You can set it bigger if you need bigger tuples (although TOAST
123 * should reduce the need to have large tuples, since fields can now
124 * be spread across multiple tuples).
126 * The maximum possible value of BLCKSZ is currently 2^15 (32768).
127 * This is determined by the 15-bit widths of the lp_off and lp_len
128 * fields in ItemIdData (see include/storage/itemid.h).
130 * CAUTION: changing BLCKSZ requires an initdb.
135 * RELSEG_SIZE is the maximum number of blocks allowed in one disk file.
136 * Thus, the maximum size of a single file is RELSEG_SIZE * BLCKSZ;
137 * relations bigger than that are divided into multiple files.
139 * CAUTION: RELSEG_SIZE * BLCKSZ must be less than your OS' limit on file
140 * size. This is typically 2Gb or 4Gb in a 32-bit operating system. By
141 * default, we make the limit 1Gb to avoid any possible integer-overflow
142 * problems within the OS. A limit smaller than necessary only means we
143 * divide a large relation into more chunks than necessary, so it seems
144 * best to err in the direction of a small limit. (Besides, a power-of-2
145 * value saves a few cycles in md.c.)
147 * CAUTION: changing RELSEG_SIZE requires an initdb.
149 #define RELSEG_SIZE (0x40000000 / BLCKSZ)
152 * Maximum number of columns in an index and maximum number of arguments
153 * to a function. They must be the same value.
155 * The minimum value is 8 (index creation uses 8-argument functions).
156 * There is no specific upper limit, although large values will waste
157 * system-table space and processing time.
159 * CAUTION: changing these requires an initdb.
161 * BTW: if you need to call dynamically-loaded old-style C functions that
162 * have more than 16 arguments, you will also need to add cases to the
163 * switch statement in fmgr_oldstyle() in src/backend/utils/fmgr/fmgr.c.
164 * But consider converting such functions to new-style instead...
166 #define INDEX_MAX_KEYS 16
167 #define FUNC_MAX_ARGS INDEX_MAX_KEYS
170 * System default value for pg_attribute.attstattarget
172 #define DEFAULT_ATTSTATTARGET 10
175 * Define this to make libpgtcl's "pg_result -assign" command process C-style
176 * backslash sequences in returned tuple data and convert Postgres array
177 * attributes into Tcl lists. CAUTION: this conversion is *wrong* unless
178 * you install the routines in contrib/string/string_io to make the backend
179 * produce C-style backslash sequences in the first place.
181 /* #define TCL_ARRAYS */
184 * User locks are handled totally on the application side as long term
185 * cooperative locks which extend beyond the normal transaction boundaries.
186 * Their purpose is to indicate to an application that someone is `working'
187 * on an item. Define this flag to enable user locks. You will need the
188 * loadable module user-locks.c to use this feature.
193 * Define this if you want psql to _always_ ask for a username and a password
194 * for password authentication.
196 /* #define PSQL_ALWAYS_GET_PASSWORDS */
199 * Define this if you want to allow the lo_import and lo_export SQL functions
200 * to be executed by ordinary users. By default these functions are only
201 * available to the Postgres superuser. CAUTION: these functions are
202 * SECURITY HOLES since they can read and write any file that the Postgres
203 * backend has permission to access. If you turn this on, don't say we
206 /* #define ALLOW_DANGEROUS_LO_FUNCTIONS */
209 * Use btree bulkload code:
210 * this code is moderately slow (~10% slower) compared to the regular
211 * btree (insertion) build code on sorted or well-clustered data. on
212 * random data, however, the insertion build code is unusable -- the
213 * difference on a 60MB heap is a factor of 15 because the random
214 * probes into the btree thrash the buffer pool.
216 * Great thanks to Paul M. Aoki (aoki@CS.Berkeley.EDU)
218 #define FASTBUILD /* access/nbtree/nbtsort.c */
221 * MAXPGPATH: standard size of a pathname buffer in Postgres (hence,
222 * maximum usable pathname length is one less).
224 * We'd use a standard system header symbol for this, if there weren't
225 * so many to choose from: MAXPATHLEN, _POSIX_PATH_MAX, MAX_PATH, PATH_MAX
226 * are all defined by different "standards", and often have different
227 * values on the same platform! So we just punt and use a reasonably
228 * generous setting here.
230 #define MAXPGPATH 1024
233 * DEFAULT_MAX_EXPR_DEPTH: default value of max_expr_depth SET variable.
235 #define DEFAULT_MAX_EXPR_DEPTH 10000
238 * PG_SOMAXCONN: maximum accept-queue length limit passed to listen(2).
239 * You'd think we should use SOMAXCONN from <sys/socket.h>, but on many
240 * systems that symbol is much smaller than the kernel's actual limit.
241 * In any case, this symbol need be twiddled only if you have a kernel
242 * that refuses large limit values, rather than silently reducing the
243 * value to what it can handle (which is what most if not all Unixen do).
245 #define PG_SOMAXCONN 10000
248 * You can try changing this if you have a machine with bytes of another
249 * size, but no guarantee...
251 #define BITS_PER_BYTE 8
254 * Define this if your operating system supports AF_UNIX family sockets.
256 #if !defined(__QNX__) && !defined(__BEOS__)
257 # define HAVE_UNIX_SOCKETS 1
261 * This is the default directory in which AF_UNIX socket files are placed.
262 * Caution: changing this risks breaking your existing client applications,
263 * which are likely to continue to look in the old directory. But if you
264 * just hate the idea of sockets in /tmp, here's where to twiddle it.
265 * You can also override this at runtime with the postmaster's -k switch.
267 #define DEFAULT_PGSOCKET_DIR "/tmp"
271 *------------------------------------------------------------------------
272 * These hand-configurable symbols are for enabling debugging code,
273 * not for controlling user-visible features or resource limits.
274 *------------------------------------------------------------------------
277 /* Define this to cause pfree()'d memory to be cleared immediately,
278 * to facilitate catching bugs that refer to already-freed values.
279 * XXX For 7.1 development, define this automatically if --enable-cassert.
280 * In the long term it probably doesn't need to be on by default.
282 #ifdef USE_ASSERT_CHECKING
283 #define CLOBBER_FREED_MEMORY
286 /* Define this to check memory allocation errors (scribbling on more
287 * bytes than were allocated).
288 * XXX For 7.1 development, define this automatically if --enable-cassert.
289 * In the long term it probably doesn't need to be on by default.
291 #ifdef USE_ASSERT_CHECKING
292 #define MEMORY_CONTEXT_CHECKING
295 /* Define this to force all parse and plan trees to be passed through
296 * copyObject(), to facilitate catching errors and omissions in copyObject().
298 /* #define COPY_PARSE_PLAN_TREES */
300 /* Enable debugging print statements in the date/time support routines. */
301 /* #define DATEDEBUG */
303 /* Enable debugging print statements for lock-related operations. */
304 /* #define LOCK_DEBUG */
307 * Other debug #defines (documentation, anyone?)
309 /* #define IPORTAL_DEBUG */
310 /* #define HEAPDEBUGALL */
311 /* #define ISTRATDEBUG */
312 /* #define ACLDEBUG */
313 /* #define RTDEBUG */
314 /* #define GISTDEBUG */
317 * defining unsafe floats will make float4 and float8 ops faster
318 * by suppressing overflow/underflow checks.
320 /* #define UNSAFE_FLOATS */
324 *------------------------------------------------------------------------
325 * Part 3: system configuration information that is auto-detected by
326 * configure. In theory you shouldn't have to touch any of this stuff
327 * by hand. In the real world, configure might get it wrong...
328 *------------------------------------------------------------------------
331 /* Define const as empty if your compiler doesn't grok const. */
334 /* Define as your compiler's spelling of "inline", or empty if no inline. */
337 /* Define as empty if the C compiler doesn't understand "signed". */
340 /* Define as empty if the C compiler doesn't understand "volatile". */
343 /* Define if your cpp understands the ANSI stringizing operators in macros */
344 #undef HAVE_STRINGIZE
346 /* Set to 1 if you have <crypt.h> */
349 /* Set to 1 if you have <dld.h> */
352 /* Set to 1 if you have <endian.h> */
355 /* Set to 1 if you have <fp_class.h> */
356 #undef HAVE_FP_CLASS_H
358 /* Set to 1 if you have <getopt.h> */
361 /* Set to 1 if you have <history.h> */
362 #undef HAVE_HISTORY_H
364 /* Set to 1 if you have <ieeefp.h> */
367 /* Set to 1 if you have <netinet/tcp.h> */
368 #undef HAVE_NETINET_TCP_H
370 /* Set to 1 if you have <readline.h> */
371 #undef HAVE_READLINE_H
373 /* Set to 1 if you have <readline/history.h> */
374 #undef HAVE_READLINE_HISTORY_H
376 /* Set to 1 if you have <readline/readline.h> */
377 #undef HAVE_READLINE_READLINE_H
379 /* Set to 1 if you have <sys/ipc.h> */
380 #undef HAVE_SYS_IPC_H
382 /* Set to 1 if you have <sys/select.h> */
383 #undef HAVE_SYS_SELECT_H
385 /* Set to 1 if you have <sys/un.h> */
388 /* Set to 1 if you have <sys/sem.h> */
389 #undef HAVE_SYS_SEM_H
391 /* Set to 1 if you have <sys/shm.h> */
392 #undef HAVE_SYS_SHM_H
394 /* Set to 1 if you have <kernel/OS.h> */
395 #undef HAVE_KERNEL_OS_H
397 /* Set to 1 if you have <SupportDefs.h> */
398 #undef HAVE_SUPPORTDEFS_H
400 /* Set to 1 if you have <kernel/image.h> */
401 #undef HAVE_KERNEL_IMAGE_H
403 /* Set to 1 if you have <termios.h> */
404 #undef HAVE_TERMIOS_H
406 /* Set to 1 if you have <sys/pstat.h> */
407 #undef HAVE_SYS_PSTAT_H
409 /* Define if string.h and strings.h may both be included */
410 #undef STRING_H_WITH_STRINGS_H
412 /* Define if you have the setproctitle function. */
413 #undef HAVE_SETPROCTITLE
415 /* Define if you have the pstat function. */
418 /* Define if the PS_STRINGS thing exists. */
419 #undef HAVE_PS_STRINGS
421 /* Define if you have the stricmp function. */
424 /* Set to 1 if you have history functions (either in libhistory or libreadline) */
425 #undef HAVE_HISTORY_FUNCTIONS
427 /* Set to 1 if you have <pwd.h> */
430 /* Set to 1 if you have gettimeofday(a) instead of gettimeofday(a,b) */
431 #undef GETTIMEOFDAY_1ARG
432 #ifdef GETTIMEOFDAY_1ARG
433 # define gettimeofday(a,b) gettimeofday(a)
436 /* Set to 1 if you have snprintf() in the C library */
439 /* Set to 1 if your standard system headers declare snprintf() */
440 #undef HAVE_SNPRINTF_DECL
442 /* Set to 1 if you have vsnprintf() in the C library */
443 #undef HAVE_VSNPRINTF
445 /* Set to 1 if your standard system headers declare vsnprintf() */
446 #undef HAVE_VSNPRINTF_DECL
448 /* Set to 1 if you have strerror() */
451 /* Set to 1 if you have isinf() */
454 extern int isinf(double x);
458 * These are all related to port/isinf.c
462 #undef HAVE_FP_CLASS_H
463 #undef HAVE_FP_CLASS_D
466 /* Set to 1 if you have gethostname() */
467 #undef HAVE_GETHOSTNAME
468 #ifndef HAVE_GETHOSTNAME
469 extern int gethostname(char *name, int namelen);
472 /* Set to 1 if struct tm has a tm_zone member */
475 /* Set to 1 if you have int timezone.
476 * NOTE: if both tm_zone and a global timezone variable exist,
477 * using the tm_zone field should probably be preferred,
478 * since global variables are inherently not thread-safe.
480 #undef HAVE_INT_TIMEZONE
482 /* Set to 1 if you have cbrt() */
485 /* Set to 1 if you have inet_aton() */
486 #undef HAVE_INET_ATON
488 #ifndef HAVE_INET_ATON
489 # include <sys/types.h>
490 # include <netinet/in.h>
491 # include <arpa/inet.h>
492 extern int inet_aton(const char *cp, struct in_addr * addr);
495 /* Set to 1 if you have fcvt() */
498 /* Set to 1 if you have rint() */
501 /* Set to 1 if you have finite() */
504 /* Set to 1 if you have memmove() */
507 /* Set to 1 if you have sigsetjmp() */
508 #undef HAVE_SIGSETJMP
511 * When there is no sigsetjmp, its functionality is provided by plain
512 * setjmp. Incidentally, nothing provides setjmp's functionality in
515 #ifndef HAVE_SIGSETJMP
516 # define sigjmp_buf jmp_buf
517 # define sigsetjmp(x,y) setjmp(x)
518 # define siglongjmp longjmp
521 /* Set to 1 if you have sysconf() */
524 /* Set to 1 if you have getrusage() */
525 #undef HAVE_GETRUSAGE
527 /* Set to 1 if you have waitpid() */
530 /* Set to 1 if you have setsid() */
533 /* Set to 1 if you have sigprocmask() */
534 #undef HAVE_SIGPROCMASK
536 /* Set to 1 if you have sigprocmask() */
537 #undef HAVE_STRCASECMP
538 #ifndef HAVE_STRCASECMP
539 extern int strcasecmp(char *s1, char *s2);
542 /* Set to 1 if you have strtol() */
545 /* Set to 1 if you have strtoul() */
548 /* Set to 1 if you have strdup() */
551 extern char *strdup(char const *);
554 /* Set to 1 if you have random() */
557 extern long random(void);
560 /* Set to 1 if you have srandom() */
563 extern void srandom(unsigned int seed);
566 /* The random() function is expected to yield values 0 .. MAX_RANDOM_VALUE */
567 /* Currently, all known implementations yield 0..2^31-1, so we just hardwire
568 * this constant. We could do a configure test if it proves to be necessary.
569 * CAUTION: Think not to replace this with RAND_MAX. RAND_MAX defines the
570 * maximum value of the older rand() function, which is often different from
571 * --- and considerably inferior to --- random().
573 #define MAX_RANDOM_VALUE (0x7FFFFFFF)
575 /* Define if you have dlopen() */
578 /* Define if you have fdatasync() */
579 #undef HAVE_FDATASYNC
581 /* Define if the standard header unistd.h declares fdatasync() */
582 #undef HAVE_FDATASYNC_DECL
584 #if defined(HAVE_FDATASYNC) && !defined(HAVE_FDATASYNC_DECL)
585 extern int fdatasync(int fildes);
588 /* Set to 1 if you have libz.a */
591 /* Set to 1 if you have libreadline.a */
592 #undef HAVE_LIBREADLINE
594 /* Set to 1 if you have libhistory.a */
595 #undef HAVE_LIBHISTORY
597 /* Set to 1 if your libreadline defines rl_completion_append_character */
598 #undef HAVE_RL_COMPLETION_APPEND_CHARACTER
600 /* Set to 1 if you have rl_completion_matches */
601 #undef HAVE_RL_COMPLETION_MATCHES
603 /* Set to 1 if you have rl_filename_completion_function */
604 #undef HAVE_RL_FILENAME_COMPLETION_FUNCTION
606 /* Set to 1 if you have getopt_long() (GNU long options) */
607 #undef HAVE_GETOPT_LONG
609 /* Set to 1 if you have union semun */
610 #undef HAVE_UNION_SEMUN
612 /* Set to 1 if you have struct cmsgcred */
613 #undef HAVE_STRUCT_CMSGCRED
615 /* Set to 1 if you have struct fcred */
616 #undef HAVE_STRUCT_FCRED
618 /* Set to 1 if you have struct sockcred */
619 #undef HAVE_STRUCT_SOCKCRED
621 /* Set to 1 if you have struct sockaddr_un */
622 #undef HAVE_STRUCT_SOCKADDR_UN
624 /* Set to 1 if type "long int" works and is 64 bits */
625 #undef HAVE_LONG_INT_64
627 /* Set to 1 if type "long long int" works and is 64 bits */
628 #undef HAVE_LONG_LONG_INT_64
630 /* Set to 1 if type "long long int" constants should be suffixed by LL */
631 #undef HAVE_LL_CONSTANTS
633 /* Define this as the appropriate snprintf format for 64-bit ints, if any */
637 * We need a #define symbol for sizeof(Datum) for use in some #if tests.
642 * These must be defined as the alignment requirement (NOT the size) of
643 * each of the basic C data types (except char, which we assume has align 1).
644 * MAXIMUM_ALIGNOF is the largest alignment requirement for any C data type.
645 * ALIGNOF_LONG_LONG_INT need only be defined if HAVE_LONG_LONG_INT_64 is.
650 #undef ALIGNOF_LONG_LONG_INT
651 #undef ALIGNOF_DOUBLE
652 #undef MAXIMUM_ALIGNOF
654 /* Define as the type of the 3rd argument to accept() */
655 #undef ACCEPT_TYPE_ARG3
657 /* Define if POSIX signal interface is available */
658 #undef HAVE_POSIX_SIGNALS
660 /* Define if C++ compiler accepts "using namespace std" */
661 #undef HAVE_NAMESPACE_STD
663 /* Define if C++ compiler accepts "#include <string>" */
664 #undef HAVE_CXX_STRING_HEADER
666 /* Define if you have the optreset variable */
667 #undef HAVE_INT_OPTRESET
669 /* Define if you have strtoll() */
672 /* Define if you have strtoq() */
675 /* If strtoq() exists, rename it to the more standard strtoll() */
676 #if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOLL) && defined(HAVE_STRTOQ)
677 # define strtoll strtoq
678 # define HAVE_STRTOLL 1
681 /* Define if you have strtoull() */
684 /* Define if you have strtouq() */
687 /* If strtouq() exists, rename it to the more standard strtoull() */
688 #if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOULL) && defined(HAVE_STRTOUQ)
689 # define strtoull strtouq
690 # define HAVE_STRTOULL 1
693 /* Define if you have atexit() */
696 /* Define if you have on_exit() */
700 *------------------------------------------------------------------------
701 * Part 4: pull in system-specific declarations.
703 * This is still configure's responsibility, because it picks where
704 * the "pg_config_os.h" symlink points...
705 *------------------------------------------------------------------------
709 * Pull in OS-specific declarations (using link created by configure)
712 #include "pg_config_os.h"
715 * The following is used as the arg list for signal handlers. Any ports
716 * that take something other than an int argument should override this in
717 * the port-specific pg_config_os.h file. Note that variable names are required
718 * because it is used in both the prototypes as well as the definitions.
719 * Note also the long name. We expect that this won't collide with
720 * other names causing compiler warnings.
724 #define SIGNAL_ARGS int postgres_signal_arg
728 #endif /* PG_CONFIG_H */