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 1.11 2001/10/20 17:57:39 tgl 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
92 /* location of locale files */
95 /* Define to build the ODBC driver for unixODBC */
98 /* Define to build the ODBC driver for iODBC */
103 *------------------------------------------------------------------------
104 * Part 2: feature symbols and limits that are user-configurable, but
105 * only by editing this file ... there's no configure support for them.
107 * Editing this file and doing a full rebuild (and an initdb if noted)
108 * should be sufficient to change any of these.
109 *------------------------------------------------------------------------
113 * Default number of buffers in shared buffer pool (each of size BLCKSZ).
114 * This is just the default setting for the postmaster's -B switch.
115 * Perhaps it ought to be configurable from a configure switch.
116 * NOTE: default setting corresponds to the minimum number of buffers
117 * that postmaster.c will allow for the default MaxBackends value.
119 #define DEF_NBUFFERS (DEF_MAXBACKENDS > 8 ? DEF_MAXBACKENDS * 2 : 16)
122 * Size of a disk block --- this also limits the size of a tuple.
123 * You can set it bigger if you need bigger tuples (although TOAST
124 * should reduce the need to have large tuples, since fields can now
125 * be spread across multiple tuples).
127 * The maximum possible value of BLCKSZ is currently 2^15 (32768).
128 * This is determined by the 15-bit widths of the lp_off and lp_len
129 * fields in ItemIdData (see include/storage/itemid.h).
131 * CAUTION: changing BLCKSZ requires an initdb.
136 * RELSEG_SIZE is the maximum number of blocks allowed in one disk file.
137 * Thus, the maximum size of a single file is RELSEG_SIZE * BLCKSZ;
138 * relations bigger than that are divided into multiple files.
140 * CAUTION: RELSEG_SIZE * BLCKSZ must be less than your OS' limit on file
141 * size. This is typically 2Gb or 4Gb in a 32-bit operating system. By
142 * default, we make the limit 1Gb to avoid any possible integer-overflow
143 * problems within the OS. A limit smaller than necessary only means we
144 * divide a large relation into more chunks than necessary, so it seems
145 * best to err in the direction of a small limit. (Besides, a power-of-2
146 * value saves a few cycles in md.c.)
148 * CAUTION: changing RELSEG_SIZE requires an initdb.
150 #define RELSEG_SIZE (0x40000000 / BLCKSZ)
153 * Maximum number of columns in an index and maximum number of arguments
154 * to a function. They must be the same value.
156 * The minimum value is 8 (index creation uses 8-argument functions).
157 * There is no specific upper limit, although large values will waste
158 * system-table space and processing time.
160 * CAUTION: changing these requires an initdb.
162 * BTW: if you need to call dynamically-loaded old-style C functions that
163 * have more than 16 arguments, you will also need to add cases to the
164 * switch statement in fmgr_oldstyle() in src/backend/utils/fmgr/fmgr.c.
165 * But consider converting such functions to new-style instead...
167 #define INDEX_MAX_KEYS 16
168 #define FUNC_MAX_ARGS INDEX_MAX_KEYS
171 * System default value for pg_attribute.attstattarget
173 #define DEFAULT_ATTSTATTARGET 10
176 * Define this to make libpgtcl's "pg_result -assign" command process C-style
177 * backslash sequences in returned tuple data and convert Postgres array
178 * attributes into Tcl lists. CAUTION: this conversion is *wrong* unless
179 * you install the routines in contrib/string/string_io to make the backend
180 * produce C-style backslash sequences in the first place.
182 /* #define TCL_ARRAYS */
185 * User locks are handled totally on the application side as long term
186 * cooperative locks which extend beyond the normal transaction boundaries.
187 * Their purpose is to indicate to an application that someone is `working'
188 * on an item. Define this flag to enable user locks. You will need the
189 * loadable module user-locks.c to use this feature.
194 * Define this if you want psql to _always_ ask for a username and a password
195 * for password authentication.
197 /* #define PSQL_ALWAYS_GET_PASSWORDS */
200 * Define this if you want to allow the lo_import and lo_export SQL functions
201 * to be executed by ordinary users. By default these functions are only
202 * available to the Postgres superuser. CAUTION: these functions are
203 * SECURITY HOLES since they can read and write any file that the Postgres
204 * backend has permission to access. If you turn this on, don't say we
207 /* #define ALLOW_DANGEROUS_LO_FUNCTIONS */
210 * Use btree bulkload code:
211 * this code is moderately slow (~10% slower) compared to the regular
212 * btree (insertion) build code on sorted or well-clustered data. on
213 * random data, however, the insertion build code is unusable -- the
214 * difference on a 60MB heap is a factor of 15 because the random
215 * probes into the btree thrash the buffer pool.
217 * Great thanks to Paul M. Aoki (aoki@CS.Berkeley.EDU)
219 #define FASTBUILD /* access/nbtree/nbtsort.c */
222 * MAXPGPATH: standard size of a pathname buffer in Postgres (hence,
223 * maximum usable pathname length is one less).
225 * We'd use a standard system header symbol for this, if there weren't
226 * so many to choose from: MAXPATHLEN, _POSIX_PATH_MAX, MAX_PATH, PATH_MAX
227 * are all defined by different "standards", and often have different
228 * values on the same platform! So we just punt and use a reasonably
229 * generous setting here.
231 #define MAXPGPATH 1024
234 * DEFAULT_MAX_EXPR_DEPTH: default value of max_expr_depth SET variable.
236 #define DEFAULT_MAX_EXPR_DEPTH 10000
239 * PG_SOMAXCONN: maximum accept-queue length limit passed to listen(2).
240 * You'd think we should use SOMAXCONN from <sys/socket.h>, but on many
241 * systems that symbol is much smaller than the kernel's actual limit.
242 * In any case, this symbol need be twiddled only if you have a kernel
243 * that refuses large limit values, rather than silently reducing the
244 * value to what it can handle (which is what most if not all Unixen do).
246 #define PG_SOMAXCONN 10000
249 * You can try changing this if you have a machine with bytes of another
250 * size, but no guarantee...
252 #define BITS_PER_BYTE 8
255 * Define this if your operating system supports AF_UNIX family sockets.
257 #if !defined(__QNX__) && !defined(__BEOS__)
258 # define HAVE_UNIX_SOCKETS 1
262 * This is the default directory in which AF_UNIX socket files are placed.
263 * Caution: changing this risks breaking your existing client applications,
264 * which are likely to continue to look in the old directory. But if you
265 * just hate the idea of sockets in /tmp, here's where to twiddle it.
266 * You can also override this at runtime with the postmaster's -k switch.
268 #define DEFAULT_PGSOCKET_DIR "/tmp"
272 *------------------------------------------------------------------------
273 * These hand-configurable symbols are for enabling debugging code,
274 * not for controlling user-visible features or resource limits.
275 *------------------------------------------------------------------------
278 /* Define this to cause pfree()'d memory to be cleared immediately,
279 * to facilitate catching bugs that refer to already-freed values.
280 * XXX For 7.1 development, define this automatically if --enable-cassert.
281 * In the long term it probably doesn't need to be on by default.
283 #ifdef USE_ASSERT_CHECKING
284 #define CLOBBER_FREED_MEMORY
287 /* Define this to check memory allocation errors (scribbling on more
288 * bytes than were allocated).
289 * XXX For 7.1 development, define this automatically if --enable-cassert.
290 * In the long term it probably doesn't need to be on by default.
292 #ifdef USE_ASSERT_CHECKING
293 #define MEMORY_CONTEXT_CHECKING
296 /* Define this to force all parse and plan trees to be passed through
297 * copyObject(), to facilitate catching errors and omissions in copyObject().
299 /* #define COPY_PARSE_PLAN_TREES */
301 /* Enable debugging print statements in the date/time support routines. */
302 /* #define DATEDEBUG */
304 /* Enable debugging print statements for lock-related operations. */
305 /* #define LOCK_DEBUG */
308 * Other debug #defines (documentation, anyone?)
310 /* #define IPORTAL_DEBUG */
311 /* #define HEAPDEBUGALL */
312 /* #define ISTRATDEBUG */
313 /* #define ACLDEBUG */
314 /* #define RTDEBUG */
315 /* #define GISTDEBUG */
318 * defining unsafe floats will make float4 and float8 ops faster
319 * by suppressing overflow/underflow checks.
321 /* #define UNSAFE_FLOATS */
325 *------------------------------------------------------------------------
326 * Part 3: system configuration information that is auto-detected by
327 * configure. In theory you shouldn't have to touch any of this stuff
328 * by hand. In the real world, configure might get it wrong...
329 *------------------------------------------------------------------------
332 /* Define const as empty if your compiler doesn't grok const. */
335 /* Define as your compiler's spelling of "inline", or empty if no inline. */
338 /* Define as empty if the C compiler doesn't understand "signed". */
341 /* Define as empty if the C compiler doesn't understand "volatile". */
344 /* Define if your cpp understands the ANSI stringizing operators in macros */
345 #undef HAVE_STRINGIZE
347 /* Set to 1 if you have <crypt.h> */
350 /* Set to 1 if you have <dld.h> */
353 /* Set to 1 if you have <endian.h> */
356 /* Set to 1 if you have <fp_class.h> */
357 #undef HAVE_FP_CLASS_H
359 /* Set to 1 if you have <getopt.h> */
362 /* Set to 1 if you have <history.h> */
363 #undef HAVE_HISTORY_H
365 /* Set to 1 if you have <ieeefp.h> */
368 /* Set to 1 if you have <netinet/tcp.h> */
369 #undef HAVE_NETINET_TCP_H
371 /* Set to 1 if you have <readline.h> */
372 #undef HAVE_READLINE_H
374 /* Set to 1 if you have <readline/history.h> */
375 #undef HAVE_READLINE_HISTORY_H
377 /* Set to 1 if you have <readline/readline.h> */
378 #undef HAVE_READLINE_READLINE_H
380 /* Set to 1 if you have <sys/ipc.h> */
381 #undef HAVE_SYS_IPC_H
383 /* Set to 1 if you have <sys/select.h> */
384 #undef HAVE_SYS_SELECT_H
386 /* Set to 1 if you have <sys/un.h> */
389 /* Set to 1 if you have <sys/sem.h> */
390 #undef HAVE_SYS_SEM_H
392 /* Set to 1 if you have <sys/shm.h> */
393 #undef HAVE_SYS_SHM_H
395 /* Set to 1 if you have <kernel/OS.h> */
396 #undef HAVE_KERNEL_OS_H
398 /* Set to 1 if you have <SupportDefs.h> */
399 #undef HAVE_SUPPORTDEFS_H
401 /* Set to 1 if you have <kernel/image.h> */
402 #undef HAVE_KERNEL_IMAGE_H
404 /* Set to 1 if you have <termios.h> */
405 #undef HAVE_TERMIOS_H
407 /* Set to 1 if you have <sys/pstat.h> */
408 #undef HAVE_SYS_PSTAT_H
410 /* Define if string.h and strings.h may both be included */
411 #undef STRING_H_WITH_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 history functions (either in libhistory or libreadline) */
426 #undef HAVE_HISTORY_FUNCTIONS
428 /* Set to 1 if you have <pwd.h> */
431 /* Set to 1 if you have gettimeofday(a) instead of gettimeofday(a,b) */
432 #undef GETTIMEOFDAY_1ARG
433 #ifdef GETTIMEOFDAY_1ARG
434 # define gettimeofday(a,b) gettimeofday(a)
437 /* Set to 1 if you have snprintf() in the C library */
440 /* Set to 1 if your standard system headers declare snprintf() */
441 #undef HAVE_SNPRINTF_DECL
443 /* Set to 1 if you have vsnprintf() in the C library */
444 #undef HAVE_VSNPRINTF
446 /* Set to 1 if your standard system headers declare vsnprintf() */
447 #undef HAVE_VSNPRINTF_DECL
449 /* Set to 1 if you have strerror() */
452 /* Set to 1 if you have isinf() */
455 extern int isinf(double x);
459 * These are all related to port/isinf.c
463 #undef HAVE_FP_CLASS_H
464 #undef HAVE_FP_CLASS_D
467 /* Set to 1 if you have gethostname() */
468 #undef HAVE_GETHOSTNAME
469 #ifndef HAVE_GETHOSTNAME
470 extern int gethostname(char *name, int namelen);
473 /* Set to 1 if struct tm has a tm_zone member */
476 /* Set to 1 if you have int timezone.
477 * NOTE: if both tm_zone and a global timezone variable exist,
478 * using the tm_zone field should probably be preferred,
479 * since global variables are inherently not thread-safe.
481 #undef HAVE_INT_TIMEZONE
483 /* Set to 1 if you have cbrt() */
486 /* Set to 1 if you have inet_aton() */
487 #undef HAVE_INET_ATON
489 #ifndef HAVE_INET_ATON
490 # include <sys/types.h>
491 # include <netinet/in.h>
492 # include <arpa/inet.h>
493 extern int inet_aton(const char *cp, struct in_addr * addr);
496 /* Set to 1 if you have fcvt() */
499 /* Set to 1 if you have rint() */
502 /* Set to 1 if you have finite() */
505 /* Set to 1 if you have memmove() */
508 /* Set to 1 if you have sigsetjmp() */
509 #undef HAVE_SIGSETJMP
512 * When there is no sigsetjmp, its functionality is provided by plain
513 * setjmp. Incidentally, nothing provides setjmp's functionality in
516 #ifndef HAVE_SIGSETJMP
517 # define sigjmp_buf jmp_buf
518 # define sigsetjmp(x,y) setjmp(x)
519 # define siglongjmp longjmp
522 /* Set to 1 if you have sysconf() */
525 /* Set to 1 if you have getrusage() */
526 #undef HAVE_GETRUSAGE
528 /* Set to 1 if you have waitpid() */
531 /* Set to 1 if you have setsid() */
534 /* Set to 1 if you have sigprocmask() */
535 #undef HAVE_SIGPROCMASK
537 /* Set to 1 if you have sigprocmask() */
538 #undef HAVE_STRCASECMP
539 #ifndef HAVE_STRCASECMP
540 extern int strcasecmp(char *s1, char *s2);
543 /* Set to 1 if you have strtol() */
546 /* Set to 1 if you have strtoul() */
549 /* Set to 1 if you have strdup() */
552 extern char *strdup(char const *);
555 /* Set to 1 if you have random() */
558 extern long random(void);
561 /* Set to 1 if you have srandom() */
564 extern void srandom(unsigned int seed);
567 /* The random() function is expected to yield values 0 .. MAX_RANDOM_VALUE */
568 /* Currently, all known implementations yield 0..2^31-1, so we just hardwire
569 * this constant. We could do a configure test if it proves to be necessary.
570 * CAUTION: Think not to replace this with RAND_MAX. RAND_MAX defines the
571 * maximum value of the older rand() function, which is often different from
572 * --- and considerably inferior to --- random().
574 #define MAX_RANDOM_VALUE (0x7FFFFFFF)
576 /* Define if you have dlopen() */
579 /* Define if you have fdatasync() */
580 #undef HAVE_FDATASYNC
582 /* Define if the standard header unistd.h declares fdatasync() */
583 #undef HAVE_FDATASYNC_DECL
585 #if defined(HAVE_FDATASYNC) && !defined(HAVE_FDATASYNC_DECL)
586 extern int fdatasync(int fildes);
589 /* Set to 1 if you have libz.a */
592 /* Set to 1 if you have libreadline.a */
593 #undef HAVE_LIBREADLINE
595 /* Set to 1 if you have libhistory.a */
596 #undef HAVE_LIBHISTORY
598 /* Set to 1 if your libreadline defines rl_completion_append_character */
599 #undef HAVE_RL_COMPLETION_APPEND_CHARACTER
601 /* Set to 1 if you have rl_completion_matches */
602 #undef HAVE_RL_COMPLETION_MATCHES
604 /* Set to 1 if you have rl_filename_completion_function */
605 #undef HAVE_RL_FILENAME_COMPLETION_FUNCTION
607 /* Set to 1 if you have getopt_long() (GNU long options) */
608 #undef HAVE_GETOPT_LONG
610 /* Set to 1 if you have union semun */
611 #undef HAVE_UNION_SEMUN
613 /* Set to 1 if you have struct cmsgcred */
614 #undef HAVE_STRUCT_CMSGCRED
616 /* Set to 1 if you have struct fcred */
617 #undef HAVE_STRUCT_FCRED
619 /* Set to 1 if you have struct sockcred */
620 #undef HAVE_STRUCT_SOCKCRED
622 /* Set to 1 if you have struct sockaddr_un */
623 #undef HAVE_STRUCT_SOCKADDR_UN
625 /* Set to 1 if type "long int" works and is 64 bits */
626 #undef HAVE_LONG_INT_64
628 /* Set to 1 if type "long long int" works and is 64 bits */
629 #undef HAVE_LONG_LONG_INT_64
631 /* Set to 1 if type "long long int" constants should be suffixed by LL */
632 #undef HAVE_LL_CONSTANTS
634 /* Define this as the appropriate snprintf format for 64-bit ints, if any */
638 * We need a #define symbol for sizeof(Datum) for use in some #if tests.
643 * These must be defined as the alignment requirement (NOT the size) of
644 * each of the basic C data types (except char, which we assume has align 1).
645 * MAXIMUM_ALIGNOF is the largest alignment requirement for any C data type.
646 * ALIGNOF_LONG_LONG_INT need only be defined if HAVE_LONG_LONG_INT_64 is.
651 #undef ALIGNOF_LONG_LONG_INT
652 #undef ALIGNOF_DOUBLE
653 #undef MAXIMUM_ALIGNOF
655 /* Define as the type of the 3rd argument to accept() */
656 #undef ACCEPT_TYPE_ARG3
658 /* Define if POSIX signal interface is available */
659 #undef HAVE_POSIX_SIGNALS
661 /* Define if C++ compiler accepts "using namespace std" */
662 #undef HAVE_NAMESPACE_STD
664 /* Define if C++ compiler accepts "#include <string>" */
665 #undef HAVE_CXX_STRING_HEADER
667 /* Define if you have the optreset variable */
668 #undef HAVE_INT_OPTRESET
670 /* Define if you have strtoll() */
673 /* Define if you have strtoq() */
676 /* If strtoq() exists, rename it to the more standard strtoll() */
677 #if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOLL) && defined(HAVE_STRTOQ)
678 # define strtoll strtoq
679 # define HAVE_STRTOLL 1
682 /* Define if you have strtoull() */
685 /* Define if you have strtouq() */
688 /* If strtouq() exists, rename it to the more standard strtoull() */
689 #if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOULL) && defined(HAVE_STRTOUQ)
690 # define strtoull strtouq
691 # define HAVE_STRTOULL 1
694 /* Define if you have atexit() */
697 /* Define if you have on_exit() */
701 *------------------------------------------------------------------------
702 * Part 4: pull in system-specific declarations.
704 * This is still configure's responsibility, because it picks where
705 * the "pg_config_os.h" symlink points...
706 *------------------------------------------------------------------------
710 * Pull in OS-specific declarations (using link created by configure)
713 #include "pg_config_os.h"
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 * the port-specific 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 #endif /* PG_CONFIG_H */