configure.in

If you have libedit already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-readline to disable libedit support.])])])])
# Note: in a libedit installation, history.h is sometimes a dummy, and may
# not be there at all.  Hence, don't complain if not found.  We must check
# though, since in yet other versions it is an independent header.
  AC_CHECK_HEADERS(editline/history.h, [],
        [AC_CHECK_HEADERS(history.h, [],
                [AC_CHECK_HEADERS(readline/history.h)])])
fi

if test "$with_zlib" = yes; then
  AC_CHECK_HEADER(zlib.h, [], [AC_MSG_ERROR([zlib header not found
If you have zlib already installed, see config.log for details on the
failure.  It is possible the compiler isn't looking in the proper directory.
Use --without-zlib to disable zlib support.])])
fi

if test "$with_gssapi" = yes ; then
  AC_CHECK_HEADERS(gssapi/gssapi.h, [],
	[AC_CHECK_HEADERS(gssapi.h, [], [AC_MSG_ERROR([gssapi.h header file is required for GSSAPI])])])
fi

if test "$with_krb5" = yes ; then
  AC_CHECK_HEADER(krb5.h, [], [AC_MSG_ERROR([header file <krb5.h> is required for Kerberos 5])])
fi

if test "$with_openssl" = yes ; then
  AC_CHECK_HEADER(openssl/ssl.h, [], [AC_MSG_ERROR([header file <openssl/ssl.h> is required for OpenSSL])])
  AC_CHECK_HEADER(openssl/err.h, [], [AC_MSG_ERROR([header file <openssl/err.h> is required for OpenSSL])])
  AC_CHECK_FUNCS([ERR_set_mark])
fi

if test "$with_pam" = yes ; then
  AC_CHECK_HEADERS(security/pam_appl.h, [],
                   [AC_CHECK_HEADERS(pam/pam_appl.h, [],
                                     [AC_MSG_ERROR([header file <security/pam_appl.h> or <pam/pam_appl.h> is required for PAM.])])])
fi

if test "$with_libxml" = yes ; then
  AC_CHECK_HEADER(libxml/parser.h, [], [AC_MSG_ERROR([header file <libxml/parser.h> is required for XML support])])
fi

if test "$with_libxslt" = yes ; then
  AC_CHECK_HEADER(libxslt/xslt.h, [], [AC_MSG_ERROR([header file <libxslt/xslt.h> is required for XSLT support])])
fi

if test "$with_ldap" = yes ; then
  if test "$PORTNAME" != "win32"; then
     AC_CHECK_HEADERS(ldap.h, [],
                      [AC_MSG_ERROR([header file <ldap.h> is required for LDAP])])
  else
     AC_CHECK_HEADERS(winldap.h, [],
                      [AC_MSG_ERROR([header file <winldap.h> is required for LDAP])],
                      [AC_INCLUDES_DEFAULT
#include <windows.h>
                      ])
  fi
fi

if test "$with_bonjour" = yes ; then
  AC_CHECK_HEADER(DNSServiceDiscovery/DNSServiceDiscovery.h, [], [AC_MSG_ERROR([header file <DNSServiceDiscovery/DNSServiceDiscovery.h> is required for Bonjour])])
fi

# for contrib/uuid-ossp
if test "$with_ossp_uuid" = yes ; then
  AC_CHECK_HEADERS(ossp/uuid.h, [], [
    AC_CHECK_HEADERS(uuid.h, [],
      [AC_MSG_ERROR([header file <ossp/uuid.h> or <uuid.h> is required for OSSP-UUID])])])
fi


##
## Types, structures, compiler characteristics
##

m4_defun([AC_PROG_CC_STDC], []) dnl We don't want that.
AC_C_BIGENDIAN
AC_C_CONST
AC_C_INLINE
AC_C_STRINGIZE
PGAC_C_SIGNED
AC_C_VOLATILE
PGAC_C_FUNCNAME_SUPPORT
PGAC_STRUCT_TIMEZONE
PGAC_UNION_SEMUN
PGAC_STRUCT_SOCKADDR_UN
PGAC_STRUCT_SOCKADDR_STORAGE
PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
PGAC_STRUCT_ADDRINFO

AC_CHECK_TYPES([struct cmsgcred, struct fcred, struct sockcred], [], [],
[#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ucred.h>])

AC_CHECK_TYPES([struct option], [], [],
[#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif])

if test "$with_zlib" = yes; then
  # Check that <zlib.h> defines z_streamp (versions before about 1.0.4
  # did not).  While we could work around the lack of z_streamp, it
  # seems unwise to encourage people to use such old zlib versions...
  AC_CHECK_TYPE(z_streamp, [], [AC_MSG_ERROR([zlib version is too old
Use --without-zlib to disable zlib support.])],
                [#include <zlib.h>])
fi

if test "$with_krb5" = yes; then
# Check for differences between MIT and Heimdal (KTH) releases
  AC_CHECK_MEMBERS(krb5_ticket.enc_part2, [],
                   [AC_CHECK_MEMBERS(krb5_ticket.client, [],
                                     [AC_MSG_ERROR([could not determine how to get client name from Kerberos 5 ticket])],
                                     [#include <krb5.h>])],
                   [#include <krb5.h>])
  AC_CHECK_MEMBERS(krb5_error.text.data, [],
                   [AC_CHECK_MEMBERS(krb5_error.e_data, [],
                                     [AC_MSG_ERROR([could not determine how to extract Kerberos 5 error messages])],
                                     [#include <krb5.h>])],
                   [#include <krb5.h>])

# Win32 requires headers to be loaded for __stdcall, so can't use
# AC_CHECK_FUNCS here.
  AC_MSG_CHECKING(for krb5_free_unparsed_name)
  AC_TRY_LINK([#include <krb5.h>],
              [krb5_free_unparsed_name(NULL,NULL);],
              [AC_DEFINE(HAVE_KRB5_FREE_UNPARSED_NAME, 1, [Define to 1 if you have krb5_free_unparsed_name]) 
AC_MSG_RESULT(yes)],
              [AC_MSG_RESULT(no)])
fi


##
## Functions, global variables
##

PGAC_VAR_INT_TIMEZONE
AC_FUNC_ACCEPT_ARGTYPES
PGAC_FUNC_GETTIMEOFDAY_1ARG

AC_CHECK_FUNCS([cbrt dlopen fcvt fdatasync getpeereid getpeerucred getrlimit memmove poll pstat readlink setproctitle setsid sigprocmask symlink sysconf towlower utime utimes waitpid wcstombs])

# posix_fadvise() is a no-op on Solaris, so don't incur function overhead
# by calling it, 2009-04-02
# http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/posix_fadvise.c
if test "$PORTNAME" != "solaris"; then
AC_CHECK_FUNCS(posix_fadvise)
AC_CHECK_DECLS(posix_fadvise, [], [], [#include <fcntl.h>])
fi

AC_CHECK_DECLS(fdatasync, [], [], [#include <unistd.h>])
AC_CHECK_DECLS([strlcat, strlcpy])
# This is probably only present on Darwin, but may as well check always
AC_CHECK_DECLS(F_FULLFSYNC, [], [], [#include <fcntl.h>])

HAVE_IPV6=no
AC_CHECK_TYPE([struct sockaddr_in6],
        [AC_DEFINE(HAVE_IPV6, 1, [Define to 1 if you have support for IPv6.])
         HAVE_IPV6=yes],
        [],
[$ac_includes_default
#include <netinet/in.h>])
AC_SUBST(HAVE_IPV6)

AC_CACHE_CHECK([for PS_STRINGS], [pgac_cv_var_PS_STRINGS],
[AC_TRY_LINK(
[#include <machine/vmparam.h>
#include <sys/exec.h>
],
[PS_STRINGS->ps_nargvstr = 1;
PS_STRINGS->ps_argvstr = "foo";],
[pgac_cv_var_PS_STRINGS=yes],
[pgac_cv_var_PS_STRINGS=no])])
if test "$pgac_cv_var_PS_STRINGS" = yes ; then
  AC_DEFINE([HAVE_PS_STRINGS], [], [Define to 1 if the PS_STRINGS thing exists.])
fi


# We use our snprintf.c emulation if either snprintf() or vsnprintf()
# is missing.  Yes, there are machines that have only one.  We may
# also decide to use snprintf.c if snprintf() is present but does not
# have all the features we need --- see below.

if test "$PORTNAME" = "win32"; then
  # Win32 gets snprintf.c built unconditionally.
  #
  # To properly translate all NLS languages strings, we must support the
  # *printf() %$ format, which allows *printf() arguments to be selected
  # by position in the translated string. 
  # 
  # libintl versions < 0.13 use the native *printf() functions, and Win32
  # *printf() doesn't understand %$, so we must use our /port versions,
  # which do understand %$. libintl versions >= 0.13 include their own
  # *printf versions on Win32.  The libintl 0.13 release note text is:
  #
  #   C format strings with positions, as they arise when a translator
  #   needs to reorder a sentence, are now supported on all platforms.
  #   On those few platforms (NetBSD and Woe32) for which the native
  #   printf()/fprintf()/... functions don't support such format
  #   strings, replacements are provided through <libintl.h>.
  #
  # We could use libintl >= 0.13's *printf() if we were sure that we had
  # a litint >= 0.13 at runtime, but seeing that there is no clean way
  # to guarantee that, it is best to just use our own, so we are sure to
  # get %$ support. In include/port.h we disable the *printf() macros
  # that might have been defined by libintl.
  #
  # We do this unconditionally whether NLS is used or not so we are sure
  # that all Win32 libraries and binaries behave the same.
  pgac_need_repl_snprintf=yes
else
  pgac_need_repl_snprintf=no
  AC_CHECK_FUNCS(snprintf, [], pgac_need_repl_snprintf=yes)
  AC_CHECK_FUNCS(vsnprintf, [], pgac_need_repl_snprintf=yes)
fi


# Check whether <stdio.h> declares snprintf() and vsnprintf(); if not,
# include/c.h will provide declarations.  Note this is a separate test
# from whether the functions exist in the C library --- there are
# systems that have the functions but don't bother to declare them :-(

AC_CHECK_DECLS([snprintf, vsnprintf])


dnl Cannot use AC_CHECK_FUNC because isinf may be a macro
AC_CACHE_CHECK([for isinf], ac_cv_func_isinf,
[AC_TRY_LINK([
#include <math.h>
double glob_double;
],
[return isinf(glob_double) ? 0 : 1;],
[ac_cv_func_isinf=yes],
[ac_cv_func_isinf=no])])

if test $ac_cv_func_isinf = yes ; then
  AC_DEFINE(HAVE_ISINF, 1, [Define to 1 if you have isinf().])
else
  AC_LIBOBJ(isinf)
  # Look for a way to implement a substitute for isinf()
  AC_CHECK_FUNCS([fpclass fp_class fp_class_d class], [break])
fi

# Some versions of libedit contain strlcpy(); so disregard that library while
# checking for these standard libc functions.
pgac_save_LIBS="$LIBS"
LIBS=`echo "$LIBS" | sed -e 's/-ledit//g' -e 's/-lreadline//g'`

AC_REPLACE_FUNCS([crypt erand48 getopt getrusage inet_aton random rint srandom strdup strerror strlcat strlcpy strtol strtoul])

case $host_os in

        # Windows uses a specialised env handler
        mingw*)
                AC_DEFINE(HAVE_UNSETENV, 1, [Define to 1 because replacement version used.])
                ac_cv_func_unsetenv=yes;;
        *)
                AC_REPLACE_FUNCS([unsetenv])
		;;
esac


LIBS="$pgac_save_LIBS"

# System's version of getaddrinfo(), if any, may be used only if we found
# a definition for struct addrinfo; see notes in src/include/getaddrinfo.h.
# (Note: the AC_REPLACE_FUNCS probe fails on Windows, where the available
# versions of getaddrinfo don't follow normal C call protocol.  This is OK
# because we want to use our own getaddrinfo.c on Windows anyway.)
if test x"$ac_cv_type_struct_addrinfo" = xyes ; then
  AC_REPLACE_FUNCS([getaddrinfo])
else
  AC_LIBOBJ(getaddrinfo)
fi

# Similarly, use system's getopt_long() only if system provides struct option.
if test x"$ac_cv_type_struct_option" = xyes ; then
  AC_REPLACE_FUNCS([getopt_long])
else
  AC_LIBOBJ(getopt_long)
fi

# Solaris' getopt() doesn't do what we want for long options, so always use
# our version on that platform.
if test "$PORTNAME" = "solaris"; then
  AC_LIBOBJ(getopt)
fi

# Cygwin's erand48 sometimes hangs, so force use of ours
if test "$PORTNAME" = "cygwin"; then
  AC_LIBOBJ(erand48)
fi

# Win32 support
if test "$PORTNAME" = "win32"; then
AC_REPLACE_FUNCS(gettimeofday)
AC_LIBOBJ(kill)
AC_LIBOBJ(open)
AC_LIBOBJ(win32env)
AC_LIBOBJ(win32error)
AC_DEFINE([HAVE_SYMLINK], 1,
          [Define to 1 if you have the `symlink' function.])
fi

if test "$with_readline" = yes; then
  PGAC_VAR_RL_COMPLETION_APPEND_CHARACTER
  AC_CHECK_FUNCS([rl_completion_matches rl_filename_completion_function])
  AC_CHECK_FUNCS([replace_history_entry])
fi


dnl Cannot use AC_CHECK_FUNC because sigsetjmp may be a macro
dnl (especially on GNU libc)
dnl See also comments in c.h.
AC_MSG_CHECKING(for sigsetjmp)
AC_TRY_LINK([#include <setjmp.h>],
            [sigjmp_buf x; sigsetjmp(x, 1);],
            [AC_DEFINE(HAVE_SIGSETJMP, 1, [Define to 1 if you have sigsetjmp().])
AC_MSG_RESULT(yes)],
            [AC_MSG_RESULT(no)])

AC_DECL_SYS_SIGLIST

AC_CHECK_FUNC(syslog,
              [AC_CHECK_HEADER(syslog.h,
                               [AC_DEFINE(HAVE_SYSLOG, 1, [Define to 1 if you have the syslog interface.])])])

AC_CACHE_CHECK([for opterr], pgac_cv_var_int_opterr,
[AC_TRY_LINK([#include <unistd.h>],
  [extern int opterr; opterr = 1;],
  [pgac_cv_var_int_opterr=yes],
  [pgac_cv_var_int_opterr=no])])
if test x"$pgac_cv_var_int_opterr" = x"yes"; then
  AC_DEFINE(HAVE_INT_OPTERR, 1, [Define to 1 if you have the global variable 'int opterr'.])
fi

AC_CACHE_CHECK([for optreset], pgac_cv_var_int_optreset,
[AC_TRY_LINK([#include <unistd.h>],
  [extern int optreset; optreset = 1;],
  [pgac_cv_var_int_optreset=yes],
  [pgac_cv_var_int_optreset=no])])
if test x"$pgac_cv_var_int_optreset" = x"yes"; then
  AC_DEFINE(HAVE_INT_OPTRESET, 1, [Define to 1 if you have the global variable 'int optreset'.])
fi

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

# Check for one of atexit() or on_exit()
AC_CHECK_FUNCS(atexit, [],
               [AC_CHECK_FUNCS(on_exit, [],
               [AC_MSG_ERROR([neither atexit() nor on_exit() found])])])

AC_REPLACE_FUNCS(fseeko)
case $host_os in
	# BSD/OS & NetBSD use a custom fseeko/ftello built on fsetpos/fgetpos
	# Mingw uses macros to access Win32 API calls
	bsdi*|netbsd*|mingw*)
		AC_DEFINE(HAVE_FSEEKO, 1, [Define to 1 because replacement version used.])
		ac_cv_func_fseeko=yes;;
	*)
		AC_FUNC_FSEEKO;;
esac


#
# Pthreads
#
# For each platform, we need to know about any special compile and link
# libraries, and whether the normal C function names are thread-safe.
# See the comment at the top of src/port/thread.c for more information.
# WIN32 doesn't need the pthread tests;  it always uses threads
if test "$enable_thread_safety" = yes -a "$PORTNAME" != "win32"; then
ACX_PTHREAD	# set thread flags

# Some platforms use these, so just define them.  They can't hurt if they
# are not supported.  For example, on Solaris -D_POSIX_PTHREAD_SEMANTICS
# enables 5-arg getpwuid_r, among other things.
PTHREAD_CFLAGS="$PTHREAD_CFLAGS -D_REENTRANT -D_THREAD_SAFE -D_POSIX_PTHREAD_SEMANTICS"


# At this point, we don't want to muck with the compiler name for threading.
# Let's see who fails, perhaps AIX.  2004-04-23
if test "$PTHREAD_CC" != "$CC"; then
AC_MSG_ERROR([
PostgreSQL does not support platforms that require a special compiler
for thread safety.])
fi

if test "$THREAD_SUPPORT" = no; then
AC_MSG_ERROR([cannot enable threads on this platform
This platform is known to not support thread-safe programs.  For details,
compile and run src/bin/pg_thread_test.])
fi

# Check for *_r functions
_CFLAGS="$CFLAGS"
_LIBS="$LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
LIBS="$LIBS $PTHREAD_LIBS"

if test "$PORTNAME" != "win32"; then
AC_CHECK_HEADER(pthread.h, [], [AC_MSG_ERROR([pthread.h not found, required for --enable-thread-safety])])
fi

AC_CHECK_FUNCS([strerror_r getpwuid_r gethostbyname_r])

# Do test here with the proper thread flags
PGAC_FUNC_GETPWUID_R_5ARG
PGAC_FUNC_STRERROR_R_INT

CFLAGS="$_CFLAGS"
LIBS="$_LIBS"

else
# do not use values from template file
PTHREAD_CFLAGS=
PTHREAD_LIBS=
fi

AC_SUBST(PTHREAD_CFLAGS)
AC_SUBST(PTHREAD_LIBS)


# We can test for libldap_r only after we know PTHREAD_LIBS
if test "$with_ldap" = yes ; then
  _LIBS="$LIBS"
  if test "$PORTNAME" != "win32"; then
    AC_CHECK_LIB(ldap, ldap_bind, [],
		 [AC_MSG_ERROR([library 'ldap' is required for LDAP])],
		 [$EXTRA_LDAP_LIBS])
    LDAP_LIBS_BE="-lldap $EXTRA_LDAP_LIBS"
    if test "$enable_thread_safety" = yes; then
      # on some platforms ldap_r fails to link without PTHREAD_LIBS
      AC_CHECK_LIB(ldap_r, ldap_simple_bind, [],
		   [AC_MSG_ERROR([library 'ldap_r' is required for LDAP])],
		   [$PTHREAD_CFLAGS $PTHREAD_LIBS $EXTRA_LDAP_LIBS])
      LDAP_LIBS_FE="-lldap_r $EXTRA_LDAP_LIBS"
    else
      LDAP_LIBS_FE="-lldap $EXTRA_LDAP_LIBS"
    fi
  else
    AC_CHECK_LIB(wldap32, ldap_bind, [], [AC_MSG_ERROR([library 'wldap32' is required for LDAP])])
    LDAP_LIBS_FE="-lwldap32"
    LDAP_LIBS_BE="-lwldap32"
  fi
  LIBS="$_LIBS"
fi
AC_SUBST(LDAP_LIBS_FE)
AC_SUBST(LDAP_LIBS_BE)


# This test makes sure that run tests work at all.  Sometimes a shared
# library is found by the linker, but the runtime linker can't find it.
# This check should come after all modifications of compiler or linker
# variables, and before any other run tests.
AC_MSG_CHECKING([test program])
AC_TRY_RUN([int main() { return 0; }],
[AC_MSG_RESULT(ok)],
[AC_MSG_RESULT(failed)
AC_MSG_ERROR([[
Could not execute a simple test program.  This may be a problem
related to locating shared libraries.  Check the file 'config.log'
for the exact reason.]])],
[AC_MSG_RESULT([cross-compiling])])

# --------------------
# Run tests below here
# --------------------

# Force use of our snprintf if system's doesn't do arg control
# See comment above at snprintf test for details.
if test "$enable_nls" = yes -a "$pgac_need_repl_snprintf" = no; then
  PGAC_FUNC_PRINTF_ARG_CONTROL
  if test $pgac_cv_printf_arg_control != yes ; then
    pgac_need_repl_snprintf=yes
  fi
fi


dnl Check to see if we have a working 64-bit integer type.
dnl This breaks down into two steps:
dnl (1) figure out if the compiler has a 64-bit int type with working
dnl arithmetic, and if so
dnl (2) see whether snprintf() can format the type correctly.  (Currently,
dnl snprintf is the only library routine we really need for int8 support.)
dnl It's entirely possible to have a compiler that handles a 64-bit type
dnl when the C library doesn't; this is fairly likely when using gcc on
dnl an older platform, for example.
dnl If there is no native snprintf() or it does not handle the 64-bit type,
dnl we force our own version of snprintf() to be used instead.
dnl Note this test must be run after our initial check for snprintf/vsnprintf.

PGAC_TYPE_64BIT_INT([long int])

if test x"$HAVE_LONG_INT_64" = x"no" ; then
  PGAC_TYPE_64BIT_INT([long long int])
fi


dnl If we need to use "long long int", figure out whether nnnLL notation works.

if test x"$HAVE_LONG_LONG_INT_64" = xyes ; then
  AC_TRY_COMPILE([
#define INT64CONST(x)  x##LL
long long int foo = INT64CONST(0x1234567890123456);
],
	[],
	[AC_DEFINE(HAVE_LL_CONSTANTS, 1, [Define to 1 if constants of type 'long long int' should have the suffix LL.])],
	[])
fi


# If we found "long int" is 64 bits, assume snprintf handles it.  If
# we found we need to use "long long int", better check.  We cope with
# snprintfs that use %lld, %qd, or %I64d as the format.  If none of these
# work, fall back to our own snprintf emulation (which we know uses %lld).

if test "$HAVE_LONG_LONG_INT_64" = yes ; then
  if test $pgac_need_repl_snprintf = no; then
    PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT
    if test "$LONG_LONG_INT_FORMAT" = ""; then
      # Force usage of our own snprintf, since system snprintf is broken
      pgac_need_repl_snprintf=yes
      LONG_LONG_INT_FORMAT='%lld'
    fi
  else
    # Here if we previously decided we needed to use our own snprintf
    LONG_LONG_INT_FORMAT='%lld'
  fi
  LONG_LONG_UINT_FORMAT=`echo "$LONG_LONG_INT_FORMAT" | sed 's/d$/u/'`
  INT64_FORMAT="\"$LONG_LONG_INT_FORMAT\""
  UINT64_FORMAT="\"$LONG_LONG_UINT_FORMAT\""
else
  # Here if we are not using 'long long int' at all
  INT64_FORMAT='"%ld"'
  UINT64_FORMAT='"%lu"'
fi

AC_DEFINE_UNQUOTED(INT64_FORMAT, $INT64_FORMAT,
                   [Define to the appropriate snprintf format for 64-bit ints, if any.])

AC_DEFINE_UNQUOTED(UINT64_FORMAT, $UINT64_FORMAT,
                   [Define to the appropriate snprintf format for unsigned 64-bit ints, if any.])

# Now we have checked all the reasons to replace snprintf
if test $pgac_need_repl_snprintf = yes; then
  AC_DEFINE(USE_REPL_SNPRINTF, 1, [Use replacement snprintf() functions.])
  AC_LIBOBJ(snprintf)
fi

# Need a #define for the size of Datum (unsigned long)
AC_CHECK_SIZEOF([unsigned long])

# And check size of void *, size_t (enables tweaks for > 32bit address space)
AC_CHECK_SIZEOF([void *])
AC_CHECK_SIZEOF([size_t])

# Decide whether float4 is passed by value: user-selectable, enabled by default
AC_MSG_CHECKING([whether to build with float4 passed by value])   
PGAC_ARG_BOOL(enable, float4-byval, yes, [disable float4 passed by value],
              [AC_DEFINE([USE_FLOAT4_BYVAL], 1,
                         [Define to 1 if you want float4 values to be passed by value. (--enable-float4-byval)])
               float4passbyval=true],
              [float4passbyval=false])
AC_MSG_RESULT([$enable_float4_byval])
AC_DEFINE_UNQUOTED([FLOAT4PASSBYVAL], [$float4passbyval], [float4 values are passed by value if 'true', by reference if 'false'])

# Decide whether float8 is passed by value.
# Note: this setting also controls int8 and related types such as timestamp.
# If sizeof(Datum) >= 8, this is user-selectable, enabled by default.
# If not, trying to select it is an error.
AC_MSG_CHECKING([whether to build with float8 passed by value])
if test $ac_cv_sizeof_unsigned_long -ge 8 ; then
  PGAC_ARG_BOOL(enable, float8-byval, yes, [disable float8 passed by value])
else
  PGAC_ARG_BOOL(enable, float8-byval, no, [disable float8 passed by value])
  if test "$enable_float8_byval" = yes ; then
    AC_MSG_ERROR([--enable-float8-byval is not supported on 32-bit platforms.])
  fi
fi
if test "$enable_float8_byval" = yes ; then
  AC_DEFINE([USE_FLOAT8_BYVAL], 1,
            [Define to 1 if you want float8, int8, etc values to be passed by value. (--enable-float8-byval)])
  float8passbyval=true
else
  float8passbyval=false
fi
AC_MSG_RESULT([$enable_float8_byval])
AC_DEFINE_UNQUOTED([FLOAT8PASSBYVAL], [$float8passbyval], [float8, int8, and related values are passed by value if 'true', by reference if 'false'])

# Determine memory alignment requirements for the basic C data types.

AC_CHECK_ALIGNOF(short)
AC_CHECK_ALIGNOF(int)
AC_CHECK_ALIGNOF(long)
if test x"$HAVE_LONG_LONG_INT_64" = x"yes" ; then
  AC_CHECK_ALIGNOF(long long int)
fi
AC_CHECK_ALIGNOF(double)

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

MAX_ALIGNOF=$ac_cv_alignof_long
if test $MAX_ALIGNOF -lt $ac_cv_alignof_double ; then
  MAX_ALIGNOF=$ac_cv_alignof_double
fi
if test x"$HAVE_LONG_LONG_INT_64" = xyes && test $MAX_ALIGNOF -lt $ac_cv_alignof_long_long_int ; then
  MAX_ALIGNOF="$ac_cv_alignof_long_long_int"
fi
AC_DEFINE_UNQUOTED(MAXIMUM_ALIGNOF, $MAX_ALIGNOF, [Define as the maximum alignment requirement of any C data type.])


# Some platforms predefine the types int8, int16, etc.  Only check
# a (hopefully) representative subset.
AC_CHECK_TYPES([int8, uint8, int64, uint64], [], [],
[#include <stdio.h>
#ifdef HAVE_SUPPORTDEFS_H
#include <SupportDefs.h>
#endif])

# We also check for sig_atomic_t, which *should* be defined per ANSI
# C, but is missing on some old platforms.
AC_CHECK_TYPES(sig_atomic_t, [], [], [#include <signal.h>])


# If the user did not disable integer datetimes, check that
# there is a working 64-bit integral type to use.
if test x"$USE_INTEGER_DATETIMES" = x"yes" &&
   test x"$HAVE_LONG_INT_64" = x"no" &&
   test x"$HAVE_LONG_LONG_INT_64" = x"no" &&
   test x"$HAVE_INT64" = x"no" ; then
  AC_MSG_ERROR([
Integer-based datetime support requires a 64-bit integer type,
but no such type could be found. The --disable-integer-datetimes
configure option can be used to disable integer-based storage
of datetime values.])
fi


if test "$PORTNAME" != "win32"
then
PGAC_FUNC_POSIX_SIGNALS
if test "$pgac_cv_func_posix_signals" != yes -a "$enable_thread_safety" = yes; then
  AC_MSG_ERROR([
Thread-safety requires POSIX signals, which are not supported by this
operating system.])
fi
fi

if test $ac_cv_func_fseeko = yes; then
AC_SYS_LARGEFILE
fi

# Check for largefile support (must be after AC_SYS_LARGEFILE)
AC_CHECK_SIZEOF([off_t])

# If we don't have largefile support, can't handle segsize >= 2GB.
if test "$ac_cv_sizeof_off_t" -lt 8 -a "$segsize" != "1"; then 
   AC_MSG_ERROR([Large file support is not enabled. Segment size cannot be larger than 1GB.]) 
fi

# SunOS doesn't handle negative byte comparisons properly with +/- return
AC_FUNC_MEMCMP


# Select semaphore implementation type.
if test "$PORTNAME" != "win32"; then
  if test x"$USE_NAMED_POSIX_SEMAPHORES" = x"1" ; then
    AC_DEFINE(USE_NAMED_POSIX_SEMAPHORES, 1, [Define to select named POSIX semaphores.])
    SEMA_IMPLEMENTATION="src/backend/port/posix_sema.c"
  else
    if test x"$USE_UNNAMED_POSIX_SEMAPHORES" = x"1" ; then
      AC_DEFINE(USE_UNNAMED_POSIX_SEMAPHORES, 1, [Define to select unnamed POSIX semaphores.])
      SEMA_IMPLEMENTATION="src/backend/port/posix_sema.c"
    else
      AC_DEFINE(USE_SYSV_SEMAPHORES, 1, [Define to select SysV-style semaphores.])
      SEMA_IMPLEMENTATION="src/backend/port/sysv_sema.c"
    fi
  fi
else
  AC_DEFINE(USE_WIN32_SEMAPHORES, 1, [Define to select Win32-style semaphores.])
  SEMA_IMPLEMENTATION="src/backend/port/win32_sema.c"
fi


# Select shared-memory implementation type.
if test "$PORTNAME" != "win32"; then
  AC_DEFINE(USE_SYSV_SHARED_MEMORY, 1, [Define to select SysV-style shared memory.])
  SHMEM_IMPLEMENTATION="src/backend/port/sysv_shmem.c"
else
  AC_DEFINE(USE_WIN32_SHARED_MEMORY, 1, [Define to select Win32-style shared memory.])
  SHMEM_IMPLEMENTATION="src/backend/port/win32_shmem.c"
fi

# If not set in template file, set bytes to use libc memset()
if test x"$MEMSET_LOOP_LIMIT" = x"" ; then
  MEMSET_LOOP_LIMIT=1024
fi
AC_DEFINE_UNQUOTED(MEMSET_LOOP_LIMIT, ${MEMSET_LOOP_LIMIT}, [Define bytes to use libc memset().])


if test "$enable_nls" = yes ; then
  PGAC_CHECK_GETTEXT
fi

# Check for Tcl configuration script tclConfig.sh
if test "$with_tcl" = yes; then
    PGAC_PATH_TCLCONFIGSH([$with_tclconfig])
    PGAC_EVAL_TCLCONFIGSH([$TCL_CONFIG_SH],
                          [TCL_INCLUDE_SPEC,TCL_LIB_FILE,TCL_LIBS,TCL_LIB_SPEC,TCL_SHARED_BUILD])
    AC_SUBST(TCL_SHLIB_LD_LIBS)dnl don't want to double-evaluate that one
    # now that we have TCL_INCLUDE_SPEC, we can check for <tcl.h>
    ac_save_CPPFLAGS=$CPPFLAGS
    CPPFLAGS="$TCL_INCLUDE_SPEC $CPPFLAGS"
    AC_CHECK_HEADER(tcl.h, [], [AC_MSG_ERROR([header file <tcl.h> is required for Tcl])])
    CPPFLAGS=$ac_save_CPPFLAGS
fi

#
# Check for DocBook and tools
#
PGAC_PROG_NSGMLS
PGAC_PROG_JADE
PGAC_CHECK_DOCBOOK(4.2)
PGAC_PATH_DOCBOOK_STYLESHEETS
PGAC_PATH_COLLATEINDEX
AC_CHECK_PROGS(SGMLSPL, sgmlspl)
PGAC_PATH_DOCBOOK2MAN

# Thread testing

# We have to run the thread test near the end so we have all our symbols
# defined.  Cross compiling throws a warning.
#
if test "$enable_thread_safety_force" = yes; then
if test "$PORTNAME" != "win32"
then
  AC_MSG_WARN([
*** Skipping thread test program.  --enable-thread-safety-force was used.
*** Run the program in src/test/thread on the your machine and add proper
*** locking function calls to your applications to guarantee thread safety.
])
else
AC_MSG_WARN([*** skipping thread test on Win32])
fi
elif test "$enable_thread_safety" = yes; then
if test "$PORTNAME" != "win32"
then
AC_MSG_CHECKING([thread safety of required library functions])

_CFLAGS="$CFLAGS"
_LIBS="$LIBS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS -DIN_CONFIGURE"
LIBS="$LIBS $PTHREAD_LIBS"
AC_TRY_RUN([#include "$srcdir/src/test/thread/thread_test.c"],
  [AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)
  AC_MSG_ERROR([thread test program failed
This platform is not thread-safe.  Check the file 'config.log' for the
exact reason.

You can use the configure option --enable-thread-safety-force to force
threads to be enabled.  But you must then run the program in
src/test/thread and add locking function calls to your applications to
guarantee thread safety.])],
  [AC_MSG_RESULT(maybe)
  AC_MSG_WARN([
*** Skipping thread test program because of cross-compile build.
*** Run the program in src/test/thread on the target machine.
])])
CFLAGS="$_CFLAGS"
LIBS="$_LIBS"
else
AC_MSG_WARN([*** skipping thread test on Win32])
fi
fi

# If compiler will take -Wl,--as-needed (or various platform-specific
# spellings thereof) then add that to LDFLAGS.  This is much easier than
# trying to filter LIBS to the minimum for each executable.
# (Note that shared library links won't use this switch, though.)
# On (at least) some Red-Hat-derived systems, this switch breaks linking to
# libreadline; therefore we postpone testing it until we know what library
# dependencies readline has.  The test code will try to link with $LIBS.
if test "$with_readline" = yes; then
  link_test_func=readline
else
  link_test_func=exit
fi

if test "$PORTNAME" = "darwin"; then
  PGAC_PROG_CC_LDFLAGS_OPT([-Wl,-dead_strip_dylibs], $link_test_func)
elif test "$PORTNAME" = "openbsd"; then
  PGAC_PROG_CC_LDFLAGS_OPT([-Wl,-Bdynamic], $link_test_func)
else
  PGAC_PROG_CC_LDFLAGS_OPT([-Wl,--as-needed], $link_test_func)
fi


# Begin output steps

AC_MSG_NOTICE([using CFLAGS=$CFLAGS])
AC_MSG_NOTICE([using CPPFLAGS=$CPPFLAGS])
AC_MSG_NOTICE([using LDFLAGS=$LDFLAGS])

# Create compiler version string
if test x"$GCC" = x"yes" ; then
  cc_string="GCC `${CC} --version | sed q`"
elif test x"$SUN_STUDIO_CC" = x"yes" ; then
  cc_string=`${CC} -V 2>&1 | sed q`
else
  cc_string=$CC
fi

AC_DEFINE_UNQUOTED(PG_VERSION_STR,
                   ["PostgreSQL $PACKAGE_VERSION on $host, compiled by $cc_string, `expr $ac_cv_sizeof_void_p \* 8`-bit"],
                   [A string containing the version number, platform, and C compiler])

# Supply a numeric version string for use by 3rd party add-ons
# awk -F is a regex on some platforms, and not on others, so make "." a tab
[PG_VERSION_NUM="`echo "$PACKAGE_VERSION" | sed 's/[A-Za-z].*$//' |
tr '.' '	' |
$AWK '{printf "%d%02d%02d", $1, $2, (NF >= 3) ? $3 : 0}'`"]
AC_DEFINE_UNQUOTED(PG_VERSION_NUM, $PG_VERSION_NUM, [PostgreSQL version as a number])


# prepare build tree if outside source tree
# Note 1: test -ef might not exist, but it's more reliable than `pwd`.
# Note 2: /bin/pwd might be better than shell's built-in at getting
#         a symlink-free name.
if ( test "$srcdir" -ef . ) >/dev/null 2>&1 || test "`cd $srcdir && /bin/pwd`" = "`/bin/pwd`"; then
  vpath_build=no
else
  vpath_build=yes
  if test "$no_create" != yes; then
    _AS_ECHO_N([preparing build tree... ])
    pgac_abs_top_srcdir=`cd "$srcdir" && pwd`
    $SHELL "$ac_aux_dir/prep_buildtree" "$pgac_abs_top_srcdir" "." \
      || AC_MSG_ERROR(failed)
    AC_MSG_RESULT(done)
  fi
fi
AC_SUBST(vpath_build)


AC_CONFIG_FILES([GNUmakefile src/Makefile.global])

AC_CONFIG_LINKS([
  src/backend/port/dynloader.c:src/backend/port/dynloader/${template}.c
  src/backend/port/pg_sema.c:${SEMA_IMPLEMENTATION}
  src/backend/port/pg_shmem.c:${SHMEM_IMPLEMENTATION}
  src/include/dynloader.h:src/backend/port/dynloader/${template}.h
  src/include/pg_config_os.h:src/include/port/${template}.h
  src/Makefile.port:src/makefiles/Makefile.${template}
])

if test "$PORTNAME" = "win32"; then
AC_CONFIG_COMMANDS([check_win32_symlinks],[
# Links sometimes fail undetected on Mingw - 
# so here we detect it and warn the user
for FILE in $CONFIG_LINKS
 do
	# test -e works for symlinks in the MinGW console
	test -e `expr "$FILE" : '\([[^:]]*\)'` || AC_MSG_WARN([*** link for $FILE -- please fix by hand])
 done
])
fi

AC_CONFIG_HEADERS([src/include/pg_config.h],
[
# Update timestamp for pg_config.h (see Makefile.global)
echo >src/include/stamp-h
])

AC_CONFIG_HEADERS([src/interfaces/ecpg/include/ecpg_config.h],
                  [echo >src/interfaces/ecpg/include/stamp-h])

AC_OUTPUT