configure.in

    [AC_CHECK_LIB(uuid, uuid_generate,
      [UUID_LIBS="-luuid"],
      [AC_MSG_ERROR([library 'uuid' is required for E2FS UUID])])])
elif test "$with_uuid" = ossp ; then
  AC_CHECK_LIB(ossp-uuid, uuid_export,
    [UUID_LIBS="-lossp-uuid"],
    [AC_CHECK_LIB(uuid, uuid_export,
      [UUID_LIBS="-luuid"],
      [AC_MSG_ERROR([library 'ossp-uuid' or 'uuid' is required for OSSP UUID])])])
fi
AC_SUBST(UUID_LIBS)


##
## Header files
##

dnl sys/socket.h is required by AC_FUNC_ACCEPT_ARGTYPES
AC_CHECK_HEADERS([atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h pwd.h sys/ioctl.h sys/ipc.h sys/poll.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/socket.h sys/sockio.h sys/tas.h sys/time.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h])

# On BSD, test for net/if.h will fail unless sys/socket.h
# is included first.
AC_CHECK_HEADERS(net/if.h, [], [],
[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])

# On OpenBSD, test for sys/ucred.h will fail unless sys/param.h
# is included first.
AC_CHECK_HEADERS(sys/ucred.h, [], [],
[AC_INCLUDES_DEFAULT
#include <sys/param.h>
])

# At least on IRIX, test for netinet/tcp.h will fail unless
# netinet/in.h is included first.
AC_CHECK_HEADERS(netinet/in.h)
AC_CHECK_HEADERS(netinet/tcp.h, [], [],
[AC_INCLUDES_DEFAULT
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
])

if expr x"$pgac_cv_check_readline" : 'x-lreadline' >/dev/null ; then
  AC_CHECK_HEADERS(readline/readline.h, [],
        [AC_CHECK_HEADERS(readline.h, [],
                [AC_MSG_ERROR([readline header not found
If you have readline 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 readline support.])])])
  AC_CHECK_HEADERS(readline/history.h, [],
        [AC_CHECK_HEADERS(history.h, [],
                [AC_MSG_ERROR([history header not found
If you have readline 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 readline support.])])])
fi

if expr x"$pgac_cv_check_readline" : 'x-ledit' >/dev/null ; then
# Some installations of libedit usurp /usr/include/readline/, which seems
# bad practice, since in combined installations readline will have its headers
# there.  We might have to resort to AC_EGREP checks to make sure we found
# the proper header...
  AC_CHECK_HEADERS(editline/readline.h, [],
        [AC_CHECK_HEADERS(readline.h, [],
                [AC_CHECK_HEADERS(readline/readline.h, [],
                        [AC_MSG_ERROR([readline header not found
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_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])])
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])])
     PGAC_LDAP_SAFE
  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(dns_sd.h, [], [AC_MSG_ERROR([header file <dns_sd.h> is required for Bonjour])])
fi

# for contrib/uuid-ossp
if test "$with_uuid" = bsd ; then
  AC_CHECK_HEADERS(uuid.h,
    [AC_EGREP_HEADER([uuid_to_string], uuid.h, [],
      [AC_MSG_ERROR([header file <uuid.h> does not match BSD UUID library])])],
    [AC_MSG_ERROR([header file <uuid.h> is required for BSD UUID])])
elif test "$with_uuid" = e2fs ; then
  AC_CHECK_HEADERS(uuid/uuid.h,
    [AC_EGREP_HEADER([uuid_generate], uuid/uuid.h, [],
      [AC_MSG_ERROR([header file <uuid/uuid.h> does not match E2FS UUID library])])],
    [AC_CHECK_HEADERS(uuid.h,
      [AC_EGREP_HEADER([uuid_generate], uuid.h, [],
        [AC_MSG_ERROR([header file <uuid.h> does not match E2FS UUID library])])],
      [AC_MSG_ERROR([header file <uuid/uuid.h> or <uuid.h> is required for E2FS UUID])])])
elif test "$with_uuid" = ossp ; then
  AC_CHECK_HEADERS(ossp/uuid.h,
    [AC_EGREP_HEADER([uuid_export], ossp/uuid.h, [],
      [AC_MSG_ERROR([header file <ossp/uuid.h> does not match OSSP UUID library])])],
    [AC_CHECK_HEADERS(uuid.h,
      [AC_EGREP_HEADER([uuid_export], uuid.h, [],
        [AC_MSG_ERROR([header file <uuid.h> does not match OSSP UUID library])])],
      [AC_MSG_ERROR([header file <ossp/uuid.h> or <uuid.h> is required for OSSP UUID])])])
fi

if test "$PORTNAME" = "win32" ; then
   AC_CHECK_HEADERS(crtdefs.h)
fi

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

m4_defun([AC_PROG_CC_STDC], []) dnl We don't want that.
AC_C_BIGENDIAN
PGAC_C_INLINE
AC_C_FLEXIBLE_ARRAY_MEMBER
PGAC_C_SIGNED
PGAC_C_FUNCNAME_SUPPORT
PGAC_C_STATIC_ASSERT
PGAC_C_TYPES_COMPATIBLE
PGAC_C_BUILTIN_CONSTANT_P
PGAC_C_BUILTIN_UNREACHABLE
PGAC_C_VA_ARGS
PGAC_STRUCT_TIMEZONE
PGAC_UNION_SEMUN
PGAC_STRUCT_SOCKADDR_UN
PGAC_STRUCT_SOCKADDR_STORAGE
PGAC_STRUCT_SOCKADDR_STORAGE_MEMBERS
PGAC_STRUCT_ADDRINFO
AC_TYPE_INTPTR_T
AC_TYPE_UINTPTR_T
AC_TYPE_LONG_LONG_INT

PGAC_TYPE_LOCALE_T

AC_CHECK_TYPES([struct cmsgcred], [], [],
[#include <sys/socket.h>
#include <sys/param.h>
#ifdef HAVE_SYS_UCRED_H
#include <sys/ucred.h>
#endif])

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

# On PPC, check if assembler supports LWARX instruction's mutex hint bit
case $host_cpu in
  ppc*|powerpc*)
    AC_MSG_CHECKING([whether assembler supports lwarx hint bit])
    AC_TRY_COMPILE([],
	[int a = 0; int *p = &a; int r;
	 __asm__ __volatile__ (" lwarx %0,0,%1,1\n" : "=&r"(r) : "r"(p));],
	[pgac_cv_have_ppc_mutex_hint=yes],
	[pgac_cv_have_ppc_mutex_hint=no])
    AC_MSG_RESULT([$pgac_cv_have_ppc_mutex_hint])
    if test x"$pgac_cv_have_ppc_mutex_hint" = xyes ; then
	AC_DEFINE(HAVE_PPC_LWARX_MUTEX_HINT, 1, [Define to 1 if the assembler supports PPC's LWARX mutex hint bit.])
    fi
  ;;
esac

# Check largefile support.  You might think this is a system service not a
# compiler characteristic, but you'd be wrong.  We must check this before
# probing existence of related functions such as fseeko, since the largefile
# defines can affect what is generated for that.
if test "$PORTNAME" != "win32"; then
   AC_SYS_LARGEFILE
   dnl Autoconf 2.69's AC_SYS_LARGEFILE believes it's a good idea to #define
   dnl _DARWIN_USE_64_BIT_INODE, but it isn't: on OS X 10.5 that activates a
   dnl bug that causes readdir() to sometimes return EINVAL.  On later OS X
   dnl versions where the feature actually works, it's on by default anyway.
   AH_VERBATIM([_DARWIN_USE_64_BIT_INODE],[])
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


##
## Functions, global variables
##

PGAC_VAR_INT_TIMEZONE
AC_FUNC_ACCEPT_ARGTYPES
PGAC_FUNC_GETTIMEOFDAY_1ARG

# Some versions of libedit contain strlcpy(), setproctitle(), and other
# symbols that that library has no business exposing to the world.  Pending
# acquisition of a clue by those developers, ignore libedit (including its
# possible alias of libreadline) while checking for everything else.
LIBS_including_readline="$LIBS"
LIBS=`echo "$LIBS" | sed -e 's/-ledit//g' -e 's/-lreadline//g'`

AC_CHECK_FUNCS([cbrt dlopen fdatasync getifaddrs getpeerucred getrlimit mbstowcs_l memmove poll pstat readlink setproctitle setsid shm_open sigprocmask symlink sync_file_range towlower utime utimes wcstombs wcstombs_l])

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

# 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], 1, [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

AC_REPLACE_FUNCS([crypt fls getopt getrusage inet_aton mkdtemp random rint srandom strerror strlcat strlcpy])

case $host_os in

        # Windows uses a specialised env handler
        # and doesn't need a replacement getpeereid because it doesn't use
        # Unix sockets.
        mingw*)
                AC_DEFINE(HAVE_UNSETENV, 1, [Define to 1 because replacement version used.])
                AC_DEFINE(HAVE_GETPEEREID, 1, [Define to 1 because function not required.])
                ac_cv_func_unsetenv=yes
                ac_cv_func_getpeereid=yes;;
        *)
                AC_REPLACE_FUNCS([unsetenv getpeereid])
		;;
esac

# 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.
# We use only our own getaddrinfo.c on Windows, but it's time to revisit that.
if test x"$ac_cv_type_struct_addrinfo" = xyes && \
   test "$PORTNAME" != "win32"; 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

# mingw has adopted a GNU-centric interpretation of optind/optreset,
# so always use our version on Windows.
if test "$PORTNAME" = "win32"; then
  AC_LIBOBJ(getopt)
  AC_LIBOBJ(getopt_long)
fi

# Win32 support
if test "$PORTNAME" = "win32"; then
  AC_REPLACE_FUNCS(gettimeofday)
  AC_LIBOBJ(kill)
  AC_LIBOBJ(open)
  AC_LIBOBJ(system)
  AC_LIBOBJ(win32env)
  AC_LIBOBJ(win32error)
  AC_LIBOBJ(win32setlocale)
  AC_DEFINE([HAVE_SYMLINK], 1,
            [Define to 1 if you have the `symlink' function.])
  AC_CHECK_TYPES(MINIDUMP_TYPE, [pgac_minidump_type=yes], [pgac_minidump_type=no], [
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <string.h>
#include <dbghelp.h>])
fi
if test x"$pgac_minidump_type" = x"yes" ; then
  AC_SUBST(have_win32_dbghelp,yes)
else
  AC_SUBST(have_win32_dbghelp,no)
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_CACHE_CHECK([for sigsetjmp], pgac_cv_func_sigsetjmp,
[AC_TRY_LINK([#include <setjmp.h>],
            [sigjmp_buf x; sigsetjmp(x, 1);],
            [pgac_cv_func_sigsetjmp=yes],
            [pgac_cv_func_sigsetjmp=no])])
if test x"$pgac_cv_func_sigsetjmp" = x"yes"; then
  AC_DEFINE(HAVE_SIGSETJMP, 1, [Define to 1 if you have sigsetjmp().])
fi

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])

# Lastly, restore full LIBS list and check for readline/libedit symbols
LIBS="$LIBS_including_readline"

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([append_history history_truncate_file])
fi


#
# 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"

# 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;  use --disable-thread-safety to disable 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_SNPRINTF_ARG_CONTROL
  if test $pgac_cv_snprintf_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.

dnl As of Postgres 8.4, we no longer support compilers without a working
dnl 64-bit type.  But we still handle the case of snprintf being broken.

PGAC_TYPE_64BIT_INT([long int])

if test x"$HAVE_LONG_INT_64" = x"yes" ; then
  pg_int64_type="long int"
else
  PGAC_TYPE_64BIT_INT([long long int])
  if test x"$HAVE_LONG_LONG_INT_64" = x"yes" ; then
    pg_int64_type="long long int"
  else
    AC_MSG_ERROR([Cannot find a working 64-bit integer type.])
  fi
fi

AC_DEFINE_UNQUOTED(PG_INT64_TYPE, $pg_int64_type,
  [Define to the name of a signed 64-bit integer type.])

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 $pgac_need_repl_snprintf = no; then
    PGAC_FUNC_SNPRINTF_LONG_LONG_INT_MODIFIER
    if test "$LONG_LONG_INT_MODIFIER" = ""; then
      # Force usage of our own snprintf, since system snprintf is broken
      pgac_need_repl_snprintf=yes
      LONG_LONG_INT_MODIFIER='ll'
    fi
  else
    # Here if we previously decided we needed to use our own snprintf
    LONG_LONG_INT_MODIFIER='ll'
  fi
else
  # Here if we are not using 'long long int' at all
  LONG_LONG_INT_MODIFIER='l'
fi

INT64_MODIFIER="\"$LONG_LONG_INT_MODIFIER\""

AC_DEFINE_UNQUOTED(INT64_MODIFIER, $INT64_MODIFIER,
                   [Define to the appropriate snprintf length modifier for 64-bit ints.])

# Also force use of our snprintf if the system's doesn't support the %z flag.
if test "$pgac_need_repl_snprintf" = no; then
  PGAC_FUNC_SNPRINTF_SIZE_T_SUPPORT
  if test "$pgac_cv_snprintf_size_t_support" != yes; then
    pgac_need_repl_snprintf=yes
  fi
fi

# 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

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

# 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 $ac_cv_sizeof_void_p -ge 8 ; then
  PGAC_ARG_BOOL(enable, float8-byval, yes, [disable float8 passed by value])
else
  PGAC_ARG_BOOL(enable, float8-byval, no, [disable float8 passed by value])
  if test "$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>])

# 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>])

# Check for various atomic operations now that we have checked how to declare
# 64bit integers.
PGAC_HAVE_GCC__SYNC_CHAR_TAS
PGAC_HAVE_GCC__SYNC_INT32_TAS
PGAC_HAVE_GCC__SYNC_INT32_CAS
PGAC_HAVE_GCC__SYNC_INT64_CAS
PGAC_HAVE_GCC__ATOMIC_INT32_CAS
PGAC_HAVE_GCC__ATOMIC_INT64_CAS

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;  use --disable-thread-safety to disable thread safety.])
fi
fi


# 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

# Select latch implementation type.
if test "$PORTNAME" != "win32"; then
  LATCH_IMPLEMENTATION="src/backend/port/unix_latch.c"
else
  LATCH_IMPLEMENTATION="src/backend/port/win32_latch.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 <perl.h>
if test "$with_perl" = yes; then
  ac_save_CPPFLAGS=$CPPFLAGS
  CPPFLAGS="$CPPFLAGS -I$perl_archlibexp/CORE"
  AC_CHECK_HEADER(perl.h, [], [AC_MSG_ERROR([header file <perl.h> is required for Perl])],
                  [#include <EXTERN.h>])
  # While we're at it, check that we can link to libperl.
  # On most platforms, if perl.h is there then libperl.so will be too, but at
  # this writing Debian packages them separately.  There is no known reason to
  # waste cycles on separate probes for the Tcl or Python libraries, though.
  pgac_save_LIBS=$LIBS
  LIBS="$perl_embed_ldflags"
  AC_MSG_CHECKING([for libperl])
  AC_TRY_LINK([
#include <EXTERN.h>
#include <perl.h>
],  [perl_alloc();],
    [AC_MSG_RESULT(yes)],
    [AC_MSG_RESULT(no)
     AC_MSG_ERROR([libperl library is required for Perl])])
  LIBS=$pgac_save_LIBS
  CPPFLAGS=$ac_save_CPPFLAGS
fi

# check for <Python.h>
if test "$with_python" = yes; then
  ac_save_CPPFLAGS=$CPPFLAGS
  CPPFLAGS="$python_includespec $CPPFLAGS"
  AC_CHECK_HEADER(Python.h, [], [AC_MSG_ERROR([header file <Python.h> is required for Python])])
  CPPFLAGS=$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(DBTOEPUB, dbtoepub)
AC_CHECK_PROGS(XMLLINT, xmllint)
AC_CHECK_PROGS(XSLTPROC, xsltproc)
AC_CHECK_PROGS(OSX, [osx sgml2xml sx])

#
# Check for test tools
#
AC_CHECK_PROGS(PROVE, prove)

# 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 "$enable_thread_safety" = yes; then
if test "$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' or compile
and run src/test/thread/thread_test for the exact reason.
Use --disable-thread-safety to disable 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.
# 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

# Create compiler version string
if test x"$GCC" = x"yes" ; then
  cc_string=`${CC} --version | sed q`
  case $cc_string in [[A-Za-z]]*) ;; *) cc_string="GCC $cc_string";; esac
elif test x"$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 $PG_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])


# Begin output steps

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

# 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:${SHMEM_IMPLEMENTATION}
  src/backend/port/pg_latch.c:${LATCH_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