configure.in

  char buf[100];

  if (sizeof(int64) != 8)
    return 0;			/* doesn't look like the right size */

  c = a * b;
  snprintf(buf, 100, INT64_FORMAT, c);
  if (strcmp(buf, "800000140000005") != 0)
    return 0;			/* either multiply or snprintf is busted */
  return 1;
}
main() {
  exit(! does_int64_snprintf_work());
}],
	[ AC_MSG_RESULT(yes)
	  INT64_FORMAT='"%lld"'
	],
  [ AC_MSG_RESULT(no)
    AC_MSG_CHECKING(whether snprintf handles 'long long int' as %qd) 
    AC_TRY_RUN([#include <stdio.h>
typedef long long int int64;
#define INT64_FORMAT "%qd"
   
int64 a = 20000001;
int64 b = 40000005;
   
int does_int64_snprintf_work()
{  
  int64 c;
  char buf[100];

  if (sizeof(int64) != 8)
    return 0;     /* doesn't look like the right size */

  c = a * b;
  snprintf(buf, 100, INT64_FORMAT, c);
  if (strcmp(buf, "800000140000005") != 0)
    return 0;     /* either multiply or snprintf is busted */
  return 1;
}
main() {
  exit(! does_int64_snprintf_work());
}],
  [ AC_MSG_RESULT(yes)
    INT64_FORMAT='"%qd"'
  ],
  [ AC_MSG_RESULT(no)
	# Force usage of our own snprintf, since system snprintf is broken
	SNPRINTF='snprintf.o'
	INT64_FORMAT='"%lld"'
  ],
  [ AC_MSG_RESULT(assuming not on target machine)
	# Force usage of our own snprintf, since we cannot test foreign snprintf
	SNPRINTF='snprintf.o'
	INT64_FORMAT='"%lld"'
  ]) ],
  [ AC_MSG_RESULT(assuming not on target machine)
	# Force usage of our own snprintf, since we cannot test foreign snprintf
	SNPRINTF='snprintf.o'
	INT64_FORMAT='"%lld"'
  ])
  else
    # here if we previously decided we needed to use our own snprintf
    INT64_FORMAT='"%lld"'
  fi
else
  # Here if we are not using 'long long int' at all
  INT64_FORMAT='"%ld"'
fi

AC_DEFINE_UNQUOTED(INT64_FORMAT, $INT64_FORMAT)


AC_CHECK_FUNCS([strtoll strtoq], [break])
AC_CHECK_FUNCS([strtoull strtouq], [break])

dnl psql needs atexit() or on_exit()
AC_CHECK_FUNC(atexit,
	[AC_DEFINE(HAVE_ATEXIT)],
	[AC_CHECK_FUNCS(on_exit,
		[AC_DEFINE(HAVE_ON_EXIT)],
		[AC_MSG_ERROR([atexi() nor on_exit() found])])])

dnl Need a #define for the size of Datum (unsigned long)

AC_CHECK_SIZEOF(unsigned long, 4)
AC_DEFINE_UNQUOTED(SIZEOF_DATUM, $ac_cv_sizeof_unsigned_long)

dnl Determine memory alignment requirements for the basic C datatypes.

PGAC_CHECK_ALIGNOF(short)
PGAC_CHECK_ALIGNOF(int)
PGAC_CHECK_ALIGNOF(long)
if [[ x"$HAVE_LONG_LONG_INT_64" = xyes ]] ; then
  PGAC_CHECK_ALIGNOF(long long int)
fi
PGAC_CHECK_ALIGNOF(double)

dnl Compute maximum alignment of any basic type.
dnl We assume long's alignment is at least as strong as char, short, or int;
dnl but we must check long long (if it exists) and double.

if test $pgac_cv_alignof_double != 'sizeof(double)' ; then
  MAX_ALIGNOF=$pgac_cv_alignof_long
  if test $MAX_ALIGNOF -lt $pgac_cv_alignof_double ; then
    MAX_ALIGNOF=$pgac_cv_alignof_double
  fi
  if test x"$HAVE_LONG_LONG_INT_64" = xyes && test $MAX_ALIGNOF -lt $pgac_cv_alignof_long_long_int ; then
    MAX_ALIGNOF="$pgac_cv_alignof_long_long_int"
  fi
else
  dnl cross-compiling: assume that double's alignment is worst case
  MAX_ALIGNOF="$pgac_cv_alignof_double"
fi
AC_DEFINE_UNQUOTED(MAXIMUM_ALIGNOF, $MAX_ALIGNOF, [Define as the maximum alignment requirement of any type])

PGAC_FUNC_POSIX_SIGNALS


# Check for Tcl configuration script tclConfig.sh
if test "$with_tcl" = yes; then
    PGAC_PATH_TCLCONFIGSH([$with_tclconfig])
fi

# Check for Tk configuration script tkConfig.sh
if test "$with_tk" = yes; then
    PGAC_PATH_TKCONFIGSH([$with_tkconfig $with_tclconfig])
fi


#
# Check for DocBook and tools
#
PGAC_PROG_NSGMLS
# If you don't have nsgmls you won't get very far, so save the cycles.
if test -n "$NSGMLS"; then
  PGAC_PROG_JADE
  PGAC_CHECK_DOCBOOK([3.1])
  PGAC_PATH_DOCBOOK_STYLESHEETS
  AC_CHECK_PROGS(SGMLSPL, sgmlspl)
fi

# check whether 'test -ef' works
if (test "$srcdir" -ef "$srcdir") >/dev/null 2>&1 ; then
  test_ef_works=yes
else
  test_ef_works=no
fi

abs_top_srcdir=
AC_SUBST(abs_top_srcdir)

if test "$test_ef_works" = yes ; then
# prepare build tree if outside source tree
  if test "$srcdir" -ef . ; then : ; else
    abs_top_srcdir=`cd $srcdir && pwd`
    echo $ac_n "preparing build tree... $ac_c" 1>&6
    /bin/sh "$srcdir/config/prep_buildtree" "$abs_top_srcdir" "." \
      || AC_MSG_ERROR(failed)
    AC_MSG_RESULT(done)
  fi
fi

AC_OUTPUT(
[
  GNUmakefile
  src/GNUmakefile
  src/Makefile.global
  src/backend/port/Makefile
],
[
# Update timestamp for config.h (see Makefile.global)
test x"$CONFIG_HEADERS" != x"" && echo >src/include/stamp-h
])