Generate pg_config.h.in by autoheader. Separate out manually editable

parts.  Standardize spelling of comments in pg_config.h.

config/c-compiler.m4

 # Macros to detect C compiler features
-# $Header: /cvsroot/pgsql/config/c-compiler.m4,v 1.6 2003/01/28 21:57:12 petere Exp $
+# $Header: /cvsroot/pgsql/config/c-compiler.m4,v 1.7 2003/04/06 22:45:22 petere Exp $
 
 
 # PGAC_C_SIGNED
@@ -12,7 +12,7 @@ AC_DEFUN([PGAC_C_SIGNED],
 [pgac_cv_c_signed=yes],
 [pgac_cv_c_signed=no])])
 if test x"$pgac_cv_c_signed" = xno ; then
-  AC_DEFINE(signed,, [Define empty if the C compiler does not understand signed types])
+  AC_DEFINE(signed,, [Define to empty if the C compiler does not understand signed types.])
 fi])# PGAC_C_SIGNED
 
 
@@ -62,7 +62,7 @@ AC_COMPILE_IFELSE([AC_LANG_BOOL_COMPILE_TRY([], [sizeof($1) == 8])],
 
 Ac_define=$Ac_cachevar
 if test x"$Ac_cachevar" = xyes ; then
-  AC_DEFINE(Ac_define,, [Set to 1 if `]$1[' is 64 bits])
+  AC_DEFINE(Ac_define,, [Define to 1 if `]$1[' works and is 64 bits.])
 fi
 undefine([Ac_define])dnl
 undefine([Ac_cachevar])dnl
@@ -92,5 +92,5 @@ else
 fi])dnl
 AC_DEFINE_UNQUOTED(AS_TR_CPP(alignof_$1),
                    [$AS_TR_SH([pgac_cv_alignof_$1])],
-                   [The alignment requirement of a `$1'])
+                   [The alignment requirement of a `$1'.])
 ])# PGAC_CHECK_ALIGNOF

config/c-library.m4

 # Macros that test various C library quirks
-# $Header: /cvsroot/pgsql/config/c-library.m4,v 1.16 2003/04/02 00:49:27 tgl Exp $
+# $Header: /cvsroot/pgsql/config/c-library.m4,v 1.17 2003/04/06 22:45:22 petere Exp $
 
 
 # PGAC_VAR_INT_TIMEZONE
@@ -14,7 +14,7 @@ int res;],
   [pgac_cv_var_int_timezone=yes],
   [pgac_cv_var_int_timezone=no])])
 if test x"$pgac_cv_var_int_timezone" = xyes ; then
-  AC_DEFINE(HAVE_INT_TIMEZONE,, [Set to 1 if you have the global variable timezone])
+  AC_DEFINE(HAVE_INT_TIMEZONE,, [Define to 1 if you have the global variable 'int timezone'.])
 fi])# PGAC_VAR_INT_TIMEZONE
 
 
@@ -32,8 +32,13 @@ gettimeofday(tp,tzp);],
 [pgac_cv_func_gettimeofday_1arg=no],
 [pgac_cv_func_gettimeofday_1arg=yes])])
 if test x"$pgac_cv_func_gettimeofday_1arg" = xyes ; then
-  AC_DEFINE(GETTIMEOFDAY_1ARG,, [Set to 1 if gettimeofday() takes only 1 argument])
-fi])# PGAC_FUNC_GETTIMEOFDAY_1ARG
+  AC_DEFINE(GETTIMEOFDAY_1ARG,, [Define to 1 if gettimeofday() takes only 1 argument.])
+fi
+AH_VERBATIM(GETTIMEOFDAY_1ARG_,
+[@%:@ifdef GETTIMEOFDAY_1ARG
+@%:@ define gettimeofday(a,b) gettimeofday(a)
+@%:@endif])dnl
+])# PGAC_FUNC_GETTIMEOFDAY_1ARG
 
 
 # PGAC_UNION_SEMUN
@@ -92,7 +97,7 @@ sigaction(0, &act, &oact);],
 [pgac_cv_func_posix_signals=yes],
 [pgac_cv_func_posix_signals=no])])
 if test x"$pgac_cv_func_posix_signals" = xyes ; then
-  AC_DEFINE(HAVE_POSIX_SIGNALS,, [Set to 1 if you have the POSIX signal interface])
+  AC_DEFINE(HAVE_POSIX_SIGNALS,, [Define to 1 if you have the POSIX signal interface.])
 fi
 HAVE_POSIX_SIGNALS=$pgac_cv_func_posix_signals
 AC_SUBST(HAVE_POSIX_SIGNALS)])# PGAC_FUNC_POSIX_SIGNALS

config/programs.m4

-# $Header: /cvsroot/pgsql/config/programs.m4,v 1.10 2002/04/10 22:46:33 petere Exp $
+# $Header: /cvsroot/pgsql/config/programs.m4,v 1.11 2003/04/06 22:45:22 petere Exp $
 
 
 # PGAC_PATH_FLEX
@@ -131,7 +131,7 @@ AC_TRY_LINK([#include <stdio.h>
 [rl_completion_append_character = 'x';],
 [AC_MSG_RESULT(yes)
 AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER, 1,
-          [Define if you have rl_completion_append_character])],
+          [Define to 1 if you have the global variable 'rl_completion_append_character'.])],
 [AC_MSG_RESULT(no)])])# PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER
 
 
@@ -163,7 +163,7 @@ dnl FIXME: We should probably check for version >=0.10.36.
 
   AC_SUBST(localedir)
   AC_DEFINE_UNQUOTED(LOCALEDIR, ["$exp_localedir"],
-                     [location of locale files])
+                     [Define to the location of locale files.])
 ])# PGAC_CHECK_GETTEXT
 
 

configure

@@ -855,7 +855,6 @@ Optional Packages:
   --with-libraries=DIRS   look for additional libraries in DIRS
   --with-libs=DIRS        alternative spelling of --with-libraries
   --with-pgport=PORTNUM   change default port number 5432
-  --with-maxbackends=N    set default maximum number of connections 32
   --with-tcl              build Tcl and Tk interfaces
   --without-tk            do not build Tk interfaces if Tcl is enabled
   --with-tclconfig=DIR    tclConfig.sh and tkConfig.sh are in DIR
@@ -1722,47 +1721,6 @@ _ACEOF
 
 
 
-#
-# Maximum number of allowed connections (--with-maxbackends), default 32
-#
-echo "$as_me:$LINENO: checking for default soft limit on number of connections" >&5
-echo $ECHO_N "checking for default soft limit on number of connections... $ECHO_C" >&6
-
-
-
-# Check whether --with-maxbackends or --without-maxbackends was given.
-if test "${with_maxbackends+set}" = set; then
-  withval="$with_maxbackends"
-
-  case $withval in
-    yes)
-      { { echo "$as_me:$LINENO: error: argument required for --with-maxbackends option" >&5
-echo "$as_me: error: argument required for --with-maxbackends option" >&2;}
-   { (exit 1); exit 1; }; }
-      ;;
-    no)
-      { { echo "$as_me:$LINENO: error: argument required for --with-maxbackends option" >&5
-echo "$as_me: error: argument required for --with-maxbackends option" >&2;}
-   { (exit 1); exit 1; }; }
-      ;;
-    *)
-
-      ;;
-  esac
-
-else
-  with_maxbackends=32
-fi;
-
-echo "$as_me:$LINENO: result: $with_maxbackends" >&5
-echo "${ECHO_T}$with_maxbackends" >&6
-
-cat >>confdefs.h <<_ACEOF
-#define DEF_MAXBACKENDS $with_maxbackends
-_ACEOF
-
-
-
 #
 # Option to disable shared libraries
 #
@@ -10146,6 +10104,8 @@ _ACEOF
 
 fi
 
+
+
 # SunOS doesn't handle negative byte comparisons properly with +/- return
 echo "$as_me:$LINENO: checking for working memcmp" >&5
 echo $ECHO_N "checking for working memcmp... $ECHO_C" >&6
@@ -10497,7 +10457,8 @@ fi
 echo "$as_me:$LINENO: result: $ac_cv_func_inet_ntop" >&5
 echo "${ECHO_T}$ac_cv_func_inet_ntop" >&6
 if test $ac_cv_func_inet_ntop = yes; then
-  cat >>confdefs.h <<\_ACEOF
+
+cat >>confdefs.h <<\_ACEOF
 #define HAVE_IPV6 1
 _ACEOF
 
@@ -11809,7 +11770,8 @@ echo "${ECHO_T}$ac_cv_header_syslog_h" >&6
 
 fi
 if test $ac_cv_header_syslog_h = yes; then
-  cat >>confdefs.h <<\_ACEOF
+
+cat >>confdefs.h <<\_ACEOF
 #define HAVE_SYSLOG 1
 _ACEOF
 
@@ -12768,7 +12730,7 @@ if test $pgac_need_repl_snprintf = yes; then
   LIBOBJS="$LIBOBJS snprintf.$ac_objext"
 fi
 
-
+# Need a #define for the size of Datum (unsigned long)
 echo "$as_me:$LINENO: checking for unsigned long" >&5
 echo $ECHO_N "checking for unsigned long... $ECHO_C" >&6
 if test "${ac_cv_type_unsigned_long+set}" = set; then
@@ -13132,11 +13094,6 @@ _ACEOF
 
 
 
-cat >>confdefs.h <<_ACEOF
-#define SIZEOF_DATUM $ac_cv_sizeof_unsigned_long
-_ACEOF
-
-
 # Determine memory alignment requirements for the basic C data types.
 
 echo "$as_me:$LINENO: checking for short" >&5

src/backend/catalog/Makefile

@@ -2,7 +2,7 @@
 #
 # Makefile for backend/catalog
 #
-# $Header: /cvsroot/pgsql/src/backend/catalog/Makefile,v 1.45 2003/01/14 23:19:34 petere Exp $
+# $Header: /cvsroot/pgsql/src/backend/catalog/Makefile,v 1.46 2003/04/06 22:45:22 petere Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -38,7 +38,7 @@ POSTGRES_BKI_SRCS := $(addprefix $(top_srcdir)/src/include/catalog/,\
 pg_includes := $(sort -I$(top_srcdir)/src/include -I$(top_builddir)/src/include)
 
 postgres.bki postgres.description: genbki.sh $(POSTGRES_BKI_SRCS) \
-    $(top_srcdir)/src/include/postgres_ext.h $(top_builddir)/src/include/pg_config.h
+    $(top_srcdir)/src/include/postgres_ext.h $(top_builddir)/src/include/pg_config_manual.h
 	CPP='$(CPP)' AWK='$(AWK)' $(SHELL) $< $(BKIOPTS) -o postgres $(pg_includes) $(POSTGRES_BKI_SRCS) --set-version=$(VERSION)
 
 .PHONY: install-data

src/backend/catalog/genbki.sh

@@ -10,7 +10,7 @@
 #
 #
 # IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/backend/catalog/Attic/genbki.sh,v 1.28 2002/07/31 17:19:51 tgl Exp $
+#    $Header: /cvsroot/pgsql/src/backend/catalog/Attic/genbki.sh,v 1.29 2003/04/06 22:45:22 petere Exp $
 #
 # NOTES
 #    non-essential whitespace is removed from the generated file.
@@ -66,7 +66,7 @@ do
             echo "  $CMDNAME [ -D define [...] ] [ -I dir ] --set-version=VERSION -o prefix files..."
             echo
             echo "Options:"
-            echo "  -I  path to postgres_ext.h and pg_config.h files"
+            echo "  -I  path to postgres_ext.h and pg_config_manual.h files"
             echo "  -o  prefix of output files"
             echo "  --set-version  PostgreSQL version number for initdb cross-check"
             echo
@@ -126,11 +126,11 @@ for dir in $INCLUDE_DIRS; do
     fi
 done
 
-# Get INDEX_MAX_KEYS from pg_config.h
+# Get INDEX_MAX_KEYS from pg_config_manual.h
 # (who needs consistency?)
 for dir in $INCLUDE_DIRS; do
-    if [ -f "$dir/pg_config.h" ]; then
-        INDEXMAXKEYS=`grep '^#define[ 	]*INDEX_MAX_KEYS' $dir/pg_config.h | $AWK '{ print $3 }'`
+    if [ -f "$dir/pg_config_manual.h" ]; then
+        INDEXMAXKEYS=`grep '^#define[ 	]*INDEX_MAX_KEYS' $dir/pg_config_manual.h | $AWK '{ print $3 }'`
         break
     fi
 done
@@ -152,9 +152,10 @@ for dir in $INCLUDE_DIRS; do
 done
 export BKIOBJECTID
 
-# NOTE: we assume here that FUNC_MAX_ARGS has the same value as INDEX_MAX_KEYS,
-# and don't read it separately from pg_config.h.  This is OK because both of them
-# must be equal to the length of oidvector.
+# NOTE: we assume here that FUNC_MAX_ARGS has the same value as
+# INDEX_MAX_KEYS, and don't read it separately from
+# pg_config_manual.h.  This is OK because both of them must be equal
+# to the length of oidvector.
 
 INDEXMAXKEYS2=`expr $INDEXMAXKEYS '*' 2` || exit
 INDEXMAXKEYS4=`expr $INDEXMAXKEYS '*' 4` || exit

src/backend/postmaster/postmaster.c

@@ -37,7 +37,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.309 2003/03/24 22:40:14 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.310 2003/04/06 22:45:22 petere Exp $
  *
  * NOTES
  *
@@ -143,13 +143,12 @@ char	   *VirtualHost;
 
 /*
  * MaxBackends is the limit on the number of backends we can start.
- * The default is established by configure, but it can be altered at
- * postmaster start with the postmaster's -N switch.  Note
- * that a larger MaxBackends value will increase the size of the shared
- * memory area as well as cause the postmaster to grab more kernel
- * semaphores, even if you never actually use that many backends.
+ * Note that a larger MaxBackends value will increase the size of the
+ * shared memory area as well as cause the postmaster to grab more
+ * kernel semaphores, even if you never actually use that many
+ * backends.
  */
-int			MaxBackends = DEF_MAXBACKENDS;
+int			MaxBackends;
 
 /*
  * ReservedBackends is the number of backends reserved for superuser use.
@@ -160,7 +159,7 @@ int			MaxBackends = DEF_MAXBACKENDS;
  * can make new connections" --- pre-existing superuser connections don't
  * count against the limit.
  */
-int			ReservedBackends = 2;
+int			ReservedBackends;
 
 
 static char *progname = (char *) NULL;
@@ -892,7 +891,7 @@ usage(const char *progname)
 #ifdef USE_ASSERT_CHECKING
 	printf(gettext("  -A 1|0          enable/disable run-time assert checking\n"));
 #endif
-	printf(gettext("  -B NBUFFERS     number of shared buffers (default %d)\n"), DEF_NBUFFERS);
+	printf(gettext("  -B NBUFFERS     number of shared buffers\n"));
 	printf(gettext("  -c NAME=VALUE   set run-time parameter\n"));
 	printf(gettext("  -d 1-5          debugging level\n"));
 	printf(gettext("  -D DATADIR      database directory\n"));
@@ -903,10 +902,9 @@ usage(const char *progname)
 #ifdef USE_SSL
 	printf(gettext("  -l              enable SSL connections\n"));
 #endif
-	printf(gettext("  -N MAX-CONNECT  maximum number of allowed connections (default %d)\n"),
-		   DEF_MAXBACKENDS);
+	printf(gettext("  -N MAX-CONNECT  maximum number of allowed connections\n"));
 	printf(gettext("  -o OPTIONS      pass 'OPTIONS' to each backend server\n"));
-	printf(gettext("  -p PORT         port number to listen on (default %d)\n"), DEF_PGPORT);
+	printf(gettext("  -p PORT         port number to listen on\n"));
 	printf(gettext("  -S              silent mode (start in background without logging output)\n"));
 	printf(gettext("  --help          show this help, then exit\n"));
 	printf(gettext("  --version       output version information, then exit\n"));

src/include/c.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: c.h,v 1.136 2003/04/04 20:42:13 momjian Exp $
+ * $Id: c.h,v 1.137 2003/04/06 22:45:23 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -51,6 +51,8 @@
  */
 
 #include "pg_config.h"
+#include "pg_config_manual.h"
+#include "pg_config_os.h"
 #include "postgres_ext.h"
 
 #include <stdio.h>
@@ -708,8 +710,7 @@ off_t ftello(FILE *stream);
 
 /*
  * Provide prototypes for routines not present in a particular machine's
- * standard C library.	It'd be better to put these in pg_config.h, but
- * in pg_config.h we haven't yet included anything that defines size_t...
+ * standard C library.
  */
 
 #if !HAVE_DECL_SNPRINTF
@@ -727,4 +728,87 @@ extern int	vsnprintf(char *str, size_t count, const char *fmt, va_list args);
 #define memmove(d, s, c)		bcopy(s, d, c)
 #endif
 
+#ifndef DLLIMPORT
+#define DLLIMPORT				/* no special DLL markers on most ports */
+#endif
+
+/*
+ * The following is used as the arg list for signal handlers.  Any ports
+ * that take something other than an int argument should override this in
+ * their pg_config_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
+#endif
+
+/*
+ * Default "extern" declarations or macro substitutes for library routines.
+ * When necessary, these routines are provided by files in src/port/.
+ */
+#ifndef HAVE_FSEEKO
+#define fseeko(a, b, c) fseek((a), (b), (c))
+#define ftello(a) ftell((a))
+#endif
+
+#ifndef HAVE_ISINF
+extern int isinf(double x);
+#endif
+
+#ifndef HAVE_GETHOSTNAME
+extern int gethostname(char *name, int namelen);
+#endif
+
+#ifndef HAVE_INET_ATON
+# include <netinet/in.h>
+# include <arpa/inet.h>
+extern int inet_aton(const char *cp, struct in_addr * addr);
+#endif
+
+/*
+ * When there is no sigsetjmp, its functionality is provided by plain
+ * setjmp. Incidentally, nothing provides setjmp's functionality in
+ * that case.
+ */
+#ifndef HAVE_SIGSETJMP
+# define sigjmp_buf jmp_buf
+# define sigsetjmp(x,y)	setjmp(x)
+# define siglongjmp longjmp
+#endif
+
+#ifndef HAVE_STRCASECMP
+extern int strcasecmp(char *s1, char *s2);
+#endif
+
+#ifndef HAVE_STRDUP
+extern char *strdup(char const *);
+#endif
+
+#ifndef HAVE_RANDOM
+extern long random(void);
+#endif
+
+#ifndef HAVE_SRANDOM
+extern void srandom(unsigned int seed);
+#endif
+
+#if defined(HAVE_FDATASYNC) && !HAVE_DECL_FDATASYNC
+extern int fdatasync(int fildes);
+#endif
+
+/* If strtoq() exists, rename it to the more standard strtoll() */
+#if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOLL) && defined(HAVE_STRTOQ)
+# define strtoll strtoq
+# define HAVE_STRTOLL 1
+#endif
+
+/* If strtouq() exists, rename it to the more standard strtoull() */
+#if defined(HAVE_LONG_LONG_INT_64) && !defined(HAVE_STRTOULL) && defined(HAVE_STRTOUQ)
+# define strtoull strtouq
+# define HAVE_STRTOULL 1
+#endif
+
 #endif   /* C_H */

src/include/miscadmin.h

@@ -12,7 +12,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: miscadmin.h,v 1.117 2003/03/20 04:51:44 momjian Exp $
+ * $Id: miscadmin.h,v 1.118 2003/04/06 22:45:23 petere Exp $
  *
  * NOTES
  *	  some of the information in this file should be moved to
@@ -171,8 +171,10 @@ extern bool NetServer;
 extern bool EnableSSL;
 extern bool SilentMode;
 extern int	MaxBackends;
+#define DEF_MAXBACKENDS 32
 extern int	ReservedBackends;
 extern DLLIMPORT int	NBuffers;
+#define DEF_NBUFFERS (DEF_MAXBACKENDS > 8 ? DEF_MAXBACKENDS * 2 : 16)
 extern int	PostPortNumber;
 extern int	Unix_socket_permissions;
 extern char *Unix_socket_group;

src/include/pg_config_manual.h

+/*------------------------------------------------------------------------
+ * PostgreSQL manual configuration settings
+ *
+ * This file contains various configuration symbols and limits.  In
+ * all cases, changing them is only useful in very rare situations or
+ * for developers.  If you edit any of these, be sure to do a *full*
+ * rebuild (and an initdb if noted).
+ *
+ * $Id: pg_config_manual.h,v 1.1 2003/04/06 22:45:23 petere Exp $
+ *------------------------------------------------------------------------
+ */
+
+/*
+ * Size of a disk block --- this also limits the size of a tuple.  You
+ * can set it bigger if you need bigger tuples (although TOAST should
+ * reduce the need to have large tuples, since fields can be spread
+ * across multiple tuples).
+ *
+ * BLCKSZ must be a power of 2.  The maximum possible value of BLCKSZ
+ * is currently 2^15 (32768).  This is determined by the 15-bit widths
+ * of the lp_off and lp_len fields in ItemIdData (see
+ * include/storage/itemid.h).
+ *
+ * Changing BLCKSZ requires an initdb.
+ */
+#define BLCKSZ	8192
+
+/*
+ * RELSEG_SIZE is the maximum number of blocks allowed in one disk
+ * file.  Thus, the maximum size of a single file is RELSEG_SIZE *
+ * BLCKSZ; relations bigger than that are divided into multiple files.
+ *
+ * RELSEG_SIZE * BLCKSZ must be less than your OS' limit on file size.
+ * This is often 2 GB or 4GB in a 32-bit operating system, unless you
+ * have large file support enabled.  By default, we make the limit 1
+ * GB to avoid any possible integer-overflow problems within the OS.
+ * A limit smaller than necessary only means we divide a large
+ * relation into more chunks than necessary, so it seems best to err
+ * in the direction of a small limit.  (Besides, a power-of-2 value
+ * saves a few cycles in md.c.)
+ *
+ * Changing RELSEG_SIZE requires an initdb.
+ */
+#define RELSEG_SIZE	(0x40000000 / BLCKSZ)
+
+/*
+ * 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 8 (index creation uses 8-argument functions).
+ * There is no specific upper limit, although large values will waste
+ * system-table space and processing time.
+ *
+ * Changing these requires an initdb.
+ */
+#define INDEX_MAX_KEYS		32
+#define FUNC_MAX_ARGS		INDEX_MAX_KEYS
+
+/*
+ * Define this to make libpgtcl's "pg_result -assign" command process
+ * C-style backslash sequences in returned tuple data and convert
+ * PostgreSQL array values into Tcl lists.  CAUTION: This conversion
+ * is *wrong* unless you install the routines in
+ * contrib/string/string_io to make the server produce C-style
+ * backslash sequences in the first place.
+ */
+/* #define TCL_ARRAYS */
+
+/*
+ * User locks are handled totally on the application side as long term
+ * cooperative locks which extend beyond the normal transaction
+ * boundaries.  Their purpose is to indicate to an application that
+ * someone is `working' on an item.  Define this flag to enable user
+ * locks.  You will need the loadable module user-locks.c to use this
+ * feature.
+ */
+#define USER_LOCKS
+
+/*
+ * Define this if you want psql to _always_ ask for a username and a
+ * password for password authentication.
+ */
+/* #define PSQL_ALWAYS_GET_PASSWORDS */
+
+/*
+ * Define this if you want to allow the lo_import and lo_export SQL
+ * functions to be executed by ordinary users.  By default these
+ * functions are only available to the Postgres superuser.  CAUTION:
+ * These functions are SECURITY HOLES since they can read and write
+ * any file that the PostgreSQL server has permission to access.  If
+ * you turn this on, don't say we didn't warn you.
+ */
+/* #define ALLOW_DANGEROUS_LO_FUNCTIONS */
+
+/*
+ * MAXPGPATH: standard size of a pathname buffer in PostgreSQL (hence,
+ * maximum usable pathname length is one less).
+ *
+ * We'd use a standard system header symbol for this, if there weren't
+ * so many to choose from: MAXPATHLEN, MAX_PATH, PATH_MAX are all
+ * defined by different "standards", and often have different values
+ * on the same platform!  So we just punt and use a reasonably
+ * generous setting here.
+ */
+#define MAXPGPATH		1024
+
+/*
+ * DEFAULT_MAX_EXPR_DEPTH: default value of max_expr_depth SET variable.
+ */
+#define DEFAULT_MAX_EXPR_DEPTH	10000
+
+/*
+ * PG_SOMAXCONN: maximum accept-queue length limit passed to
+ * listen(2).  You'd think we should use SOMAXCONN from
+ * <sys/socket.h>, but on many systems that symbol is much smaller
+ * than the kernel's actual limit.  In any case, this symbol need be
+ * twiddled only if you have a kernel that refuses large limit values,
+ * rather than silently reducing the value to what it can handle
+ * (which is what most if not all Unixen do).
+ */
+#define PG_SOMAXCONN	10000
+
+/*
+ * You can try changing this if you have a machine with bytes of
+ * another size, but no guarantee...
+ */
+#define BITS_PER_BYTE		8
+
+/*
+ * Define this if your operating system supports AF_UNIX family
+ * sockets.
+ */
+#if !defined(__QNX__) && !defined(__BEOS__)
+# define HAVE_UNIX_SOCKETS 1
+#endif
+
+/*
+ * This is the default directory in which AF_UNIX socket files are
+ * placed.  Caution: changing this risks breaking your existing client
+ * applications, which are likely to continue to look in the old
+ * directory.  But if you just hate the idea of sockets in /tmp,
+ * here's where to twiddle it.  You can also override this at runtime
+ * with the postmaster's -k switch.
+ */
+#define DEFAULT_PGSOCKET_DIR  "/tmp"
+
+/*
+ * Defining this will make float4 and float8 operations faster by
+ * suppressing overflow/underflow checks.
+ */
+/* #define UNSAFE_FLOATS */
+
+/*
+ * The random() function is expected to yield values between 0 and
+ * MAX_RANDOM_VALUE.  Currently, all known implementations yield
+ * 0..2^31-1, so we just hardwire this constant.  We could do a
+ * configure test if it proves to be necessary.  CAUTION: Think not to
+ * replace this with RAND_MAX.  RAND_MAX defines the maximum value of
+ * the older rand() function, which is often different from --- and
+ * considerably inferior to --- random().
+ */
+#define MAX_RANDOM_VALUE  (0x7FFFFFFF)
+
+
+/*
+ *------------------------------------------------------------------------
+ * The following symbols are for enabling debugging code, not for
+ * controlling user-visible features or resource limits.
+ *------------------------------------------------------------------------
+ */
+
+/*
+ * Define this to cause pfree()'d memory to be cleared immediately, to
+ * facilitate catching bugs that refer to already-freed values.  XXX
+ * Right now, this gets defined 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
+
+/*
+ * Define this to check memory allocation errors (scribbling on more
+ * bytes than were allocated).  Right now, this gets defined
+ * automatically if --enable-cassert.  In the long term it probably
+ * doesn't need to be on by default.
+ */
+#ifdef USE_ASSERT_CHECKING 
+#define MEMORY_CONTEXT_CHECKING
+#endif
+
+/*
+ * Define this to force all parse and plan trees to be passed through
+ * copyObject(), to facilitate catching errors and omissions in
+ * copyObject().
+ */
+/* #define COPY_PARSE_PLAN_TREES */
+
+/*
+ * Enable debugging print statements for lock-related operations.
+ */
+/* #define LOCK_DEBUG */
+
+/*
+ * Other debug #defines (documentation, anyone?)
+ */
+/* #define IPORTAL_DEBUG  */
+/* #define HEAPDEBUGALL  */
+/* #define ISTRATDEBUG  */
+/* #define ACLDEBUG */
+/* #define RTDEBUG */
+/* #define GISTDEBUG */

src/include/postgres.h

@@ -10,7 +10,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1995, Regents of the University of California
  *
- * $Id: postgres.h,v 1.62 2002/10/18 20:33:57 tgl Exp $
+ * $Id: postgres.h,v 1.63 2003/04/06 22:45:23 petere Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -130,6 +130,7 @@ typedef struct varattrib
  */
 
 typedef unsigned long Datum;	/* XXX sizeof(long) >= sizeof(void *) */
+#define SIZEOF_DATUM SIZEOF_UNSIGNED_LONG
 typedef Datum *DatumPtr;
 
 #define GET_1_BYTE(datum)	(((Datum) (datum)) & 0x000000ff)