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Rearrange config.h entries into a more sensible order, and add some

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documentation.  Let's try to keep this file a bit neater in future,
hmm?  Also (to get back to the original point) update info about
FUNC_MAX_ARGS, and add additional config symbols for debugging
new memory management changes.
REL7_1_STABLE
Tom Lane 26 years ago
parent d1080d19b1
commit 6a7b40d909
1 changed files with 152 additions and 108 deletions
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  1. 260
      src/include/config.h.in

260
src/include/config.h.in
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@ -3,12 +3,12 @@
*
* config.h.in is processed by configure to produce config.h.
*
* If you want to modify any of the tweakable settings in the first part
* If you want to modify any of the tweakable settings in Part 2
* of this file, you can do it in config.h.in before running configure,
* or in config.h afterwards. Of course, if you edit config.h, then your
* changes will be overwritten the next time you run configure.
*
* $Id: config.h.in,v 1.120 2000/06/19 16:58:37 petere Exp $
* $Id: config.h.in,v 1.121 2000/06/29 05:50:29 tgl Exp $
*/
#ifndef CONFIG_H
@ -16,12 +16,75 @@
/*
* Default runtime limit on number of backend server processes per postmaster;
*------------------------------------------------------------------------
* Part 1: feature symbols and limits that are set by configure based on
* user-supplied switches. This is first so that stuff in Part 2 can
* depend on these values.
*
* Beware of "fixing" configure-time mistakes by editing these values,
* since configure may have inserted the settings in other files as well
* as here. Best to rerun configure if you forgot --enable-multibyte
* or whatever.
*------------------------------------------------------------------------
*/
/* Set to 1 if you want LOCALE support (--enable-locale) */
#undef USE_LOCALE
/* Set to 1 if you want cyrillic recode (--enable-recode) */
#undef CYR_RECODE
/* Set to 1 if you want to use multibyte characters (--enable-multibyte) */
#undef MULTIBYTE
/* Set to 1 if you want ASSERT checking (--enable-cassert) */
#undef USE_ASSERT_CHECKING
/* Set to 1 to use syslog() to write postmaster log (--enable-syslog) */
/* (CAUTION: large log entries confuse syslog on many platforms!) */
#undef ENABLE_SYSLOG
/* Define to build with Kerberos 4 support (--with-krb4[=DIR]) */
#undef KRB4
/* Define to build with Kerberos 5 support (--with-krb5[=DIR]) */
#undef KRB5
/* Kerberos name of the Postgres service principal (--with-krb-srvnam=NAME) */
#undef PG_KRB_SRVNAM
/* Location of the Kerberos server's keytab file (--with-krb-srvtab=FILE) */
#undef PG_KRB_SRVTAB
/*
* DEF_PGPORT is the TCP port number on which the Postmaster listens and
* which clients will try to connect to. This is just a default value;
* it can be overridden at postmaster or client startup. It's awfully
* convenient if your clients have the right default compiled in, though.
* (--with-pgport=PORTNUM)
*/
#undef DEF_PGPORT
/* ... and once more as a string constant instead */
#undef DEF_PGPORT_STR
/*
* Default soft limit on number of backend server processes per postmaster;
* this is just the default setting for the postmaster's -N switch.
* (Actual value is now set by configure script.)
* (--with-maxbackends=N)
*/
#undef DEF_MAXBACKENDS
/*
*------------------------------------------------------------------------
* Part 2: feature symbols and limits that are user-configurable, but
* only by editing this file ... there's no configure support for them.
*
* Editing this file and doing a full rebuild (and an initdb if noted)
* should be sufficient to change any of these.
*------------------------------------------------------------------------
*/
/*
* Hard limit on number of backend server processes per postmaster.
* Increasing this costs about 32 bytes per process slot as of v 6.5.
@ -40,8 +103,11 @@
/*
* Size of a disk block --- currently, this limits the size of a tuple.
* You can set it bigger if you need bigger tuples.
*
* CAUTION: changing BLCKSZ requires an initdb.
*
* currently must be <= 32k bjm
*/
/* currently must be <= 32k bjm */
#define BLCKSZ 8192
/*
@ -57,8 +123,7 @@
* best to err in the direction of a small limit. (Besides, a power-of-2
* value saves a few cycles in md.c.)
*
* CAUTION: you had best do an initdb if you change either BLCKSZ or
* RELSEG_SIZE.
* CAUTION: changing RELSEG_SIZE requires an initdb.
*/
#define RELSEG_SIZE (0x40000000 / BLCKSZ)
@ -66,28 +131,20 @@
* Maximum number of columns in an index and maximum number of arguments
* to a function. They must be the same value.
*
* The minimum value is 9 (btree index creation has a 9-argument function).
* The minimum value is 8 (index creation uses 8-argument functions).
* There is no specific upper limit, although large values will waste
* system-table space and processing time.
*
* There is no maximum value, though if you want to pass more than 32
* arguments to a function, you will have to modify
* pgsql/src/backend/utils/fmgr/fmgr.c and add additional entries
* to the 'case' statement for the additional arguments.
* CAUTION: changing these requires an initdb.
*
* BTW: if you need to call dynamically-loaded old-style C functions that
* have more than 16 arguments, you will also need to add cases to the
* switch statement in fmgr_oldstyle() in src/backend/utils/fmgr/fmgr.c.
* But consider converting such functions to new-style instead...
*/
#define INDEX_MAX_KEYS 16
#define FUNC_MAX_ARGS INDEX_MAX_KEYS
/*
* Enables debugging print statements in the date/time support routines.
* Particularly useful for porting to a new platform/OS combination.
*/
/* #define DATEDEBUG */
/*
* defining unsafe floats's will make float4 and float8
* ops faster at the cost of safety, of course!
*/
/* #define UNSAFE_FLOATS */
/*
* Define this to make libpgtcl's "pg_result -assign" command process C-style
* backslash sequences in returned tuple data and convert Postgres array
@ -134,29 +191,6 @@
*/
#define FASTBUILD /* access/nbtree/nbtsort.c */
/*
* TBL_FREE_CMD_MEMORY: free memory allocated for a user query inside
* transaction block after this query is done.
*/
#define TBL_FREE_CMD_MEMORY
#undef ENABLE_SYSLOG
/* Debug #defines */
/* #define IPORTAL_DEBUG */
/* #define HEAPDEBUGALL */
/* #define ISTRATDEBUG */
/* #define FASTBUILD_DEBUG */
/* #define ACLDEBUG */
/* #define RTDEBUG */
/* #define GISTDEBUG */
/* #define OMIT_PARTIAL_INDEX */
/* #define NO_BUFFERISVALID */
/* #define NO_SECURITY */
/* #define OLD_REWRITE */
/* #define LOCK_DEBUG */
/*
* MAXPGPATH: standard size of a pathname buffer in Postgres (hence,
* maximum usable pathname length is one less).
@ -174,33 +208,62 @@
*/
#define DEFAULT_MAX_EXPR_DEPTH 10000
/*
*------------------------------------------------------------------------
* Everything past here is set by the configure script.
* These hand-configurable symbols are for enabling debugging code,
* not for controlling user-visible features or resource limits.
*------------------------------------------------------------------------
*/
/* Set to 1 if you want to USE_LOCALE */
#undef USE_LOCALE
/* Define this to cause pfree()'d memory to be cleared immediately,
* to facilitate catching bugs that refer to already-freed values.
* XXX For 7.1 development, define this automatically if --enable-cassert.
* In the long term it probably doesn't need to be on by default.
*/
#ifdef USE_ASSERT_CHECKING
#define CLOBBER_FREED_MEMORY
#endif
/* Set to 1 if you want CYR_RECODE (cyrillic recode) */
#undef CYR_RECODE
/* Define this to force all parse and plan trees to be passed through
* copyObject(), to facilitate catching errors and omissions in copyObject().
* XXX For 7.1 development, define this automatically if --enable-cassert.
* In the long term it probably doesn't need to be on by default.
*/
#ifdef USE_ASSERT_CHECKING
#define COPY_PARSE_PLAN_TREES
#endif
/* Set to 1 if you want to use multibyte characters */
#undef MULTIBYTE
/* Enable debugging print statements in the date/time support routines. */
/* #define DATEDEBUG */
/* Set to 1 if you want to Enable ASSERT CHECKING */
#undef USE_ASSERT_CHECKING
/*
* Other debug #defines (documentation, anyone?)
*/
/* #define IPORTAL_DEBUG */
/* #define HEAPDEBUGALL */
/* #define ISTRATDEBUG */
/* #define FASTBUILD_DEBUG */
/* #define ACLDEBUG */
/* #define RTDEBUG */
/* #define GISTDEBUG */
/* #define OMIT_PARTIAL_INDEX */
/* #define NO_SECURITY */
/* #define LOCK_DEBUG */
/*
* defining unsafe floats's will make float4 and float8
* ops faster at the cost of safety, of course!
*/
/* #define UNSAFE_FLOATS */
/*
* DEF_PGPORT is the TCP port number on which the Postmaster listens by
* default. This can be overriden by command options, environment variables,
* and the postconfig hook. (now set by configure script)
*/
#undef DEF_PGPORT
/* ... and once more as a string constant instead */
#undef DEF_PGPORT_STR
/*
*------------------------------------------------------------------------
* Part 3: system configuration information that is auto-detected by
* configure. In theory you shouldn't have to touch any of this stuff
* by hand. In the real world, configure might get it wrong...
*------------------------------------------------------------------------
*/
/* Define const as empty if your compiler doesn't grok const. */
#undef const
@ -298,23 +361,12 @@
/* Set to 1 if you have libreadline and it includes history functions */
#undef HAVE_HISTORY_IN_READLINE
/*
* Block of parameters for the ODBC code.
*/
/* Set to 1 if you have <pwd.h> */
#undef HAVE_PWD_H
/* Define if you have the <sys/param.h> header file. */
#undef HAVE_SYS_PARAM_H
/* Define if you have the dl library (-ldl). */
#undef HAVE_LIBDL
/*
* End parameters for ODBC code.
*/
/* Set to 1 if you gettimeofday(a,b) vs gettimeofday(a) */
#undef GETTIMEOFDAY_1ARG
#ifdef GETTIMEOFDAY_1ARG
@ -336,8 +388,13 @@
/* Set to 1 if you have strerror() */
#undef HAVE_STRERROR
/* Set to 1 if you have isinf() */
#undef HAVE_ISINF
#ifndef HAVE_ISINF
extern int isinf(double x);
#endif
/*
* Set to 1 if you have isinf().
* These are all related to port/isinf.c
*/
#undef HAVE_FPCLASS
@ -346,15 +403,10 @@
#undef HAVE_FP_CLASS_D
#undef HAVE_CLASS
#undef HAVE_ISINF
#ifndef HAVE_ISINF
int isinf(double x);
#endif
/* Set to 1 if you have gethostname() */
#undef HAVE_GETHOSTNAME
#ifndef HAVE_GETHOSTNAME
int gethostname(char *name, int namelen);
extern int gethostname(char *name, int namelen);
#endif
/* Set to 1 if struct tm has a tm_zone member */
@ -380,7 +432,7 @@ int gethostname(char *name, int namelen);
# endif
# include <arpa/inet.h>
# endif
extern int inet_aton(const char *cp, struct in_addr * addr);
extern int inet_aton(const char *cp, struct in_addr * addr);
#endif
/* Set to 1 if you have fcvt() */
@ -427,7 +479,7 @@ extern int inet_aton(const char *cp, struct in_addr * addr);
/* Set to 1 if you have sigprocmask() */
#undef HAVE_STRCASECMP
#ifndef HAVE_STRCASECMP
extern int strcasecmp(char *s1, char *s2);
extern int strcasecmp(char *s1, char *s2);
#endif
/* Set to 1 if you have strtol() */
@ -472,13 +524,6 @@ extern void srandom(unsigned int seed);
/* Set to 1 if you have getopt_long() (GNU long options) */
#undef HAVE_GETOPT_LONG
/*
* On architectures for which we have not implemented spinlocks (or
* cannot do so), we use System V semaphores. We also use them for
* long locks. For some reason union semun is never defined in the
* System V header files so we must do it ourselves.
*/
/* Set to 1 if you have union semun */
#undef HAVE_UNION_SEMUN
@ -494,7 +539,8 @@ extern void srandom(unsigned int seed);
/* Define this as the appropriate snprintf format for 64-bit ints, if any */
#undef INT64_FORMAT
/* These must be defined as the alignment requirement (NOT the size) of
/*
* These must be defined as the alignment requirement (NOT the size) of
* each of the basic C data types (except char, which we assume has align 1).
* MAXIMUM_ALIGNOF is the largest alignment requirement for any C data type.
* ALIGNOF_LONG_LONG_INT need only be defined if HAVE_LONG_LONG_INT_64 is.
@ -506,7 +552,7 @@ extern void srandom(unsigned int seed);
#undef ALIGNOF_DOUBLE
#undef MAXIMUM_ALIGNOF
/* Define as the type of the type of the 3rd argument to accept() */
/* Define as the type of the 3rd argument to accept() */
#undef ACCEPT_TYPE_ARG3
/* Define if POSIX signal interface is available */
@ -518,17 +564,15 @@ extern void srandom(unsigned int seed);
/* Define if C++ compiler accepts "#include <string>" */
#undef HAVE_CXX_STRING_HEADER
/* Define if you are building with Kerberos 4 support */
#undef KRB4
/* Define if you are building with Kerberos 5 support */
#undef KRB5
/* The name of the Postgres service principal in Kerberos */
#undef PG_KRB_SRVNAM
/* The location of the Kerberos server's keytab file */
#undef PG_KRB_SRVTAB
/*
*------------------------------------------------------------------------
* Part 4: pull in system-specific declarations.
*
* This is still configure's responsibility, because it picks where
* the "os.h" symlink points...
*------------------------------------------------------------------------
*/
/*
* Pull in OS-specific declarations (using link created by configure)
@ -538,15 +582,15 @@ extern void srandom(unsigned int seed);
/*
* The following is used as the arg list for signal handlers. Any ports
* that take something other than an int argument should change this in
* the port specific makefile. Note that variable names are required
* that take something other than an int argument should override this in
* the port-specific os.h file. Note that variable names are required
* because it is used in both the prototypes as well as the definitions.
* Note also the long name. We expect that this won't collide with
* other names causing compiler warnings.
*/
#ifndef SIGNAL_ARGS
# define SIGNAL_ARGS int postgres_signal_arg
#ifndef SIGNAL_ARGS
#define SIGNAL_ARGS int postgres_signal_arg
#endif

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