dnl ##
dnl ## Autoconf configuration file for APR
dnl ##

dnl Process this file with autoconf to produce a configure script.
AC_INIT(apr_common.m4)
AC_CONFIG_HEADER(include/apr_private.h)
AC_CONFIG_AUX_DIR(helpers)

AC_CANONICAL_SYSTEM
echo "Configuring APR library"
OS=$host
echo "Platform: $OS"

dnl # Some initial steps for configuration.  We setup the default directory
dnl # and which files are to be configured.

dnl Preload
APR_PRELOAD

dnl Absolute source/build directory
abs_srcdir=`(cd $srcdir && pwd)`
abs_builddir=`pwd`

dnl Get location of helpers directory
dnl XXX This assumes that APR "lives" under Apache.
dnl XXX We'll need to fix this when we pull it out.
abs_helpersdir=$abs_srcdir/helpers
MKDIR=$abs_helpersdir/mkdir.sh

if test "$abs_builddir" != "$abs_srcdir"; then
  USE_VPATH=1
fi

# These added to allow default directories to be used...
DEFAULT_OSDIR="unix"
echo "(Default will be ${DEFAULT_OSDIR})"
MODULES="file_io network_io threadproc misc locks time mmap shmem i18n user"

# Most platforms use a prefix of 'lib' on their library files.
LIBPREFIX='lib'

dnl # Checks for programs.
AC_PROG_CC
AC_PROG_RANLIB_NC
AC_PROG_MAKE_SET
AC_CHECK_PROG(RM, rm, rm)
AC_CHECK_TOOL(AR, ar, ar)

# This macro needs to be here in case we are on an AIX box.
AC_AIX

APR_EBCDIC
 
# Use /bin/sh if it exists, otherwise go looking for sh in the path
if test ".$SH" = . -a -f /bin/sh; then
  SH="/bin/sh"
fi
AC_CHECK_PROG(SH, sh, sh)

dnl #----------------------------- Checks for compiler flags
nl='
'
echo $ac_n "${nl}Check for compiler flags..."
AC_ARG_WITH(optim,[  --with-optim="FLAGS"      compiler optimisation flags],
        [OPTIM="$withval"])

AC_ARG_WITH(debug,[  --with-debug            Turn on debugging and compile time warnings],
        [if test "$GCC" = "yes"; then CFLAGS="$CFLAGS -g -Wall"; else CFLAGS="$CFLAGS -g"; fi])

AC_ARG_WITH(maintainer-mode,[  --with-maintainer-mode  Turn on debugging and compile time warnings],
        [if test "$GCC" = "yes"; then CFLAGS="$CFLAGS -g -Wall -Wmissing-prototypes -Wstrict-prototypes -Wmissing-declarations"; else CFLAGS="$CFLAGS -g"; fi])

dnl # this is the place to put specific options for platform/compiler
dnl # combinations
case "$OS:$CC" in
    *-hp-hpux*:cc )
	CFLAGS="$CFLAGS -Ae +DAportable"
	;;
    powerpc-*-beos:mwcc* )
        CPP="mwcc -E"
        CC="mwcc"
        AR="ar"
        ;;
    mips-sni-sysv4:cc )
	CFLAGS="$CFLAGS -Kthread"
	;;
esac

case "$OS" in
   *-os2*)
       CFLAGS="$CFLAGS -DOS2 -Zmt"
       OSDIR="os2"
       LIBPREFIX=""
       enable_threads="system_threads"
       eolstr="\\r\\n"
       ;;
   *beos*)
       OSDIR="beos"
       CFLAGS="$CFLAGS -DBEOS"
       enable_threads="system_threads"
       config_subdirs="shmem/unix/mm"
       native_mmap_emul="1"
       USE_MM=yes
       AC_CHECK_DEFINE(BONE_VERSION, sys/socket.h)
       eolstr="\\n"
       ;;
   *os390)
       OSDIR="os390"
       config_subdirs="shmem/unix/mm"
       USE_MM=yes
       eolstr="\\n"
       ;;
   *)
       OSDIR="unix"
       config_subdirs="shmem/unix/mm"
       USE_MM=yes
       eolstr="\\n"
       ;;
esac

AC_SUBST(eolstr)

dnl #----------------------------- Checking for Shared Memory Support 
echo $ac_n "${nl}Checking for Shared Memory Support...${nl}"

# run the MM config script regardless of whether we are going to use
# it or not.  When we have a much better idea of who is using MM, we can
# run this on a more conditional basis.
mm_dir=shmem/unix/mm

if test "$USE_MM" = "yes"; then
  APR_PREPARE_MM_DIR
  RUN_SUBDIR_CONFIG_NOW($config_subdirs)
fi

AC_MSG_CHECKING(for Shared memory support)
AC_ARG_ENABLE(shmem,
  [  --enable-shmem          Enable shared memory support in APR. ],
  [ ],
  ac_cv_enable_shmem="mm" )

sharedmem="0"
anonymous_shm="0"
filebased_shm="0"
keybased_shm="0"
if test "$ac_cv_enable_shmem" = "mm"; then
  sharedmem="1"
  anonymous_shm="1"
  AC_MSG_RESULT(anonymous)
elif test "$ac_cv_enable_shmem" = "file"; then
  sharedmem="1"
  filebased_shm="1"
  AC_MSG_RESULT(file based)
elif test "$ac_cv_enable_shmem" = "key"; then
  sharedmem="1"
  keybased_shm="1"
  AC_MSG_RESULT(key based)
else
  AC_MSG_RESULT(no)
fi
AC_SUBST(sharedmem)
AC_SUBST(anonymous_shm)
AC_SUBST(filebased_shm)
AC_SUBST(keybased_shm)

AC_CHECK_DEFINE(MM_SHMT_MMFILE, $srcdir/shmem/unix/mm/mm_conf.h) 

if test "ac_cv_define_MM_SHMT_MMFILE" = "yes"; then
    file_based="1"
    mem_based="0"
else
    file_based="0"
    mem_based="1"
fi

AC_SUBST(mem_based)
AC_SUBST(file_based)

if test ".$SYS_SW" = ".AIX"; then
    CFLAGS="$CFLAGS -U__STR__"
    case "$SYS_KV" in
        [12]*)
            AC_DEFINE(USEBCOPY)
            OSDIR="aix"
            ;;
        3*)
            AC_DEFINE(NEED_RLIM_T)
            OSDIR="aix"
            ;;
        41*)
            AC_DEFINE(NEED_RLIM_T)
            OSDIR="aix"
            ;;
        42*)
            OSDIR="aix"
            ;;
    esac
fi

dnl #----------------------------- Checks for Any required Libraries
AC_CHECK_LIB(nsl,gethostbyname)
AC_SEARCH_LIBS(gethostname, nsl)
AC_CHECK_LIB(socket,socket)
AC_SEARCH_LIBS(crypt, crypt ufc)
AC_CHECK_LIB(truerand,main)
AC_CHECK_LIB(iconv,iconv)

dnl #----------------------------- Checks for Any required Functions
dnl Checks for library functions. (N.B. poll is further down)
AC_CHECK_FUNCS(strcasecmp stricmp setsid nl_langinfo)
AC_CHECK_FUNCS(sigaction, [ have_sigaction="1" ], [ have_sigaction="0" ]) 
AC_CHECK_FUNCS(setrlimit, [ have_setrlimit="1" ], [ have_setrlimit="0" ]) 
AC_CHECK_FUNCS(getrlimit, [ have_getrlimit="1" ], [ have_getrlimit="0" ]) 
AC_CHECK_FUNCS(writev)
sendfile="0"
AC_CHECK_FUNCS(sendfile send_file, [ sendfile="1" ])
case "$OS" in
    *alpha*-dec-osf* )
        sendfile="0"
        echo "sendfile support disabled to avoid system problem"
        ;;
esac       
AC_CHECK_FUNCS(fork, [ fork="1" ], [ fork="0" ])
AC_CHECK_FUNCS(getpass)
APR_CHECK_INET_ADDR
APR_CHECK_INET_NETWORK
AC_SUBST(apr_inaddr_none)
AC_CHECK_FUNC(_getch)
AC_CHECK_FUNCS(gmtime_r localtime_r)
AC_CHECK_FUNCS(iconv, [ iconv="1" ], [ iconv="0" ])
AC_CHECK_FUNCS(mmap, [ mmap="1" ], [ mmap="0" ])
if test "$native_mmap_emul" = "1"; then
    mmap="1"
fi
AC_CHECK_FUNCS(hstrerror)
AC_CHECK_FUNCS(memmove, [ have_memmove="1" ], [have_memmove="0" ])
AC_CHECK_FUNCS(bzero, [ have_bzero="1" ], [ have_bzero="0"] )

AC_SUBST(sendfile)
AC_SUBST(fork)
AC_SUBST(have_inet_addr)
AC_SUBST(have_inet_network)
AC_SUBST(have_sigaction)
AC_SUBST(have_setrlimit)
AC_SUBST(have_getrlimit)
AC_SUBST(iconv)
AC_SUBST(mmap)
AC_SUBST(have_memmove)
AC_SUBST(have_bzero)

dnl #----------------------------- Checks for Any required Headers
AC_HEADER_STDC

AC_CHECK_HEADERS(ByteOrder.h)
AC_CHECK_HEADERS(conio.h)
AC_CHECK_HEADERS(crypt.h)
AC_CHECK_HEADERS(ctype.h, ctypeh="1", ctypeh="0")
AC_CHECK_HEADERS(dir.h)
AC_CHECK_HEADERS(dirent.h, direnth="1", dirent="0")
AC_CHECK_HEADERS(errno.h, errnoh="1", errnoh="0")
AC_CHECK_HEADERS(net/errno.h)
AC_CHECK_HEADERS(fcntl.h, fcntlh="1", fcntl="0")
AC_CHECK_HEADERS(io.h)
AC_CHECK_HEADERS(limits.h)
AC_CHECK_HEADERS(malloc.h)
AC_CHECK_HEADERS(memory.h)
AC_CHECK_HEADERS(netdb.h)
AC_CHECK_HEADERS(osreldate.h)
AC_CHECK_HEADERS(process.h)
AC_CHECK_HEADERS(pwd.h)
AC_CHECK_HEADERS(sys/sem.h)
AC_CHECK_HEADERS(signal.h, signalh="1", signalh="0")
AC_CHECK_HEADERS(stdarg.h, stdargh="1", stdargh="0")
AC_CHECK_HEADERS(stdio.h, stdioh="1", stdioh"0")
AC_CHECK_HEADERS(stdlib.h)
AC_CHECK_HEADERS(string.h)
AC_CHECK_HEADERS(strings.h)
AC_CHECK_HEADERS(sysapi.h)
AC_CHECK_HEADERS(sysgtime.h)
AC_CHECK_HEADERS(termios.h)
AC_CHECK_HEADERS(time.h)
AC_CHECK_HEADERS(sys/time.h)
AC_CHECK_HEADERS(tpfeq.h)
AC_CHECK_HEADERS(tpfio.h)
AC_CHECK_HEADERS(sys/uio.h, sys_uioh="1", sys_uioh="0")
AC_CHECK_HEADERS(unistd.h)
AC_CHECK_HEADERS(poll.h)
AC_CHECK_HEADERS(sys/poll.h)
AC_CHECK_HEADERS(unix.h)
AC_CHECK_HEADERS(arpa/inet.h)
AC_CHECK_HEADERS(netinet/in.h, netinet_inh="1", netinet_inh="0")
AC_CHECK_HEADERS(netinet/tcp.h)
AC_CHECK_HEADERS(iconv.h)
AC_CHECK_HEADERS(langinfo.h)

AC_CHECK_HEADERS(sys/file.h)
AC_CHECK_HEADERS(sys/mman.h)
AC_CHECK_HEADERS(sys/resource.h)
AC_CHECK_HEADERS(sys/select.h)
AC_CHECK_HEADERS(sys/sendfile.h)
AC_CHECK_HEADERS(sys/signal.h)
AC_CHECK_HEADERS(sys/socket.h, sys_socketh="1", sys_socketh="0")
AC_CHECK_HEADERS(sys/stat.h)
AC_CHECK_HEADERS(sys/types.h, sys_typesh="1", sys_typesh="0")
AC_CHECK_HEADERS(sys/wait.h, sys_waith="1", sys_waith="0")
AC_CHECK_HEADERS(dlfcn.h)
AC_CHECK_HEADERS(dl.h)

AC_CHECK_HEADERS(kernel/OS.h)

AC_SUBST(ctypeh)
AC_SUBST(errnoh)
AC_SUBST(direnth)
AC_SUBST(fcntlh)
AC_SUBST(netinet_inh)
AC_SUBST(stdargh)
AC_SUBST(stdioh)
AC_SUBST(sys_socketh)
AC_SUBST(sys_typesh)
AC_SUBST(sys_uioh)
AC_SUBST(signalh)
AC_SUBST(sys_waith)
AC_SUBST(pthreadh)

dnl #----------------------------- Checks for standard typedefs
AC_TYPE_OFF_T
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AC_CHECK_TYPE(ssize_t, int)
AC_C_INLINE
AC_C_CONST
AC_TYPE_SIZE_T
AC_FUNC_SETPGRP

APR_CHECK_SOCKLEN_T

APR_INADDR_NONE

dnl # Checks for integer size
AC_CHECK_SIZEOF(char, 1)
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long, 4)
AC_CHECK_SIZEOF(short, 2)
AC_CHECK_SIZEOF(long double, 12)
AC_CHECK_SIZEOF(long long, 8)

if test "$ac_cv_sizeof_short" = "2"; then
    short_value=short
fi
if test "$ac_cv_sizeof_int" = "4"; then
    int_value=int
fi
if test "$ac_cv_sizeof_long" = "8"; then
    long_value=long
fi
if test "$ac_cv_sizeof_long_double" = "8"; then
    long_value="long double"
fi
if test "$ac_cv_sizeof_long_long" = "8"; then
    if test "$ac_cv_sizeof_long_long" = "$ac_cv_sizeof_long"; then
        long_value="long"
    else
        long_value="long long"
    fi
fi
if test "$ac_cv_sizeof_longlong" = "8"; then
    long_value="__int64"
fi

if test "$ac_cv_type_off_t" = "yes"; then
    off_t_value="off_t"
else
    off_t_value="apr_int32_t"
fi
if test "$ac_cv_type_size_t" = "yes"; then
    size_t_value="size_t"
else
    size_t_value="apr_int32_t"
fi
if test "$ac_cv_type_ssize_t" = "yes"; then
    ssize_t_value="ssize_t"
else
    ssize_t_value="apr_int32_t"
fi
if test "$ac_cv_socklen_t" = "yes"; then
    socklen_t_value="socklen_t"
else
    socklen_t_value="int"
fi

AC_CHECK_SIZEOF_EXTENDED([#include <sys/types.h>], ssize_t, 8)

if test "$ac_cv_sizeof_ssize_t" = "$ac_cv_sizeof_int"; then
    ssize_t_fmt='#define APR_SSIZE_T_FMT "d"'
elif test "$ac_cv_sizeof_ssize_t" = "$ac_cv_sizeof_long"; then
    ssize_t_fmt='#define APR_SSIZE_T_FMT "ld"'
else
    ssize_t_fmt='#error Can not determine the proper size for ssize_t'
fi

AC_CHECK_SIZEOF_EXTENDED([#include <sys/types.h>], off_t, 8)

if test "$ac_cv_sizeof_off_t" = "$ac_cv_sizeof_int"; then
    off_t_fmt='#define APR_OFF_T_FMT "d"'
elif test "$ac_cv_sizeof_off_t" = "$ac_cv_sizeof_long"; then
    off_t_fmt='#define APR_OFF_T_FMT "ld"'
elif test "$ac_cv_sizeof_off_t" = "$ac_cv_sizeof_long_long"; then
    off_t_fmt='#define APR_OFF_T_FMT "qd"'
else
    off_t_fmt='#error Can not determine the proper size for off_t'
fi

# basically, we have tried to figure out the sizes of apr_ssize_t and
# apr_off_t, but we don't always get it right.  If you find that we
# don't get it right for your platform, you can override our decision
# below.
case "$OS" in
   *linux* | *os2_emx | *-pc-solaris*)
       off_t_fmt='#define APR_OFF_T_FMT "ld"'
esac

AC_SUBST(short_value)
AC_SUBST(int_value)
AC_SUBST(long_value)
AC_SUBST(off_t_value)
AC_SUBST(size_t_value)
AC_SUBST(ssize_t_value)
AC_SUBST(socklen_t_value)
AC_SUBST(ssize_t_fmt) 
AC_SUBST(off_t_fmt) 

dnl #----------------------------- Checking for string functions
AC_CHECK_FUNCS(strnicmp, have_strnicmp="1", have_strnicmp="0")
AC_CHECK_FUNCS(strncasecmp, have_strncasecmp="1", have_strncasecmp="0")
AC_CHECK_FUNCS(stricmp, have_stricmp="1", have_stricmp="0")
AC_CHECK_FUNCS(strcasecmp, have_strcasecmp="1", have_strcasecmp="0")
AC_CHECK_FUNCS(strdup, have_strdup="1", have_strdup="0")
AC_CHECK_FUNCS(strstr, have_strstr="1", have_strstr="0")

AC_SUBST(have_strnicmp)
AC_SUBST(have_strncasecmp)
AC_SUBST(have_stricmp)
AC_SUBST(have_strcasecmp)
AC_SUBST(have_strdup)
AC_SUBST(have_strstr)

dnl #----------------------------- Checking for DSO support
echo $ac_n "${nl}Checking for DSO...${nl}"
AC_ARG_ENABLE(dso,
  [  --enable-dso            Enable dso support ],
  [ tempdso=$enableval],
  [ 
    AC_CHECK_LIB(dl, dlopen, [ tempdso="yes" LIBS="$LIBS -ldl" ], 
                 tempdso="no")
    if test "$tempdso" = "no"; then
      AC_CHECK_FUNCS(dlopen, [ tempdso="yes" ], [ tempdso="no" ])
    fi
     if test "$tempdso" = "no"; then
        AC_CHECK_LIB(root, load_image, tempdso="yes", tempdso="no")
    fi
    if test "$tempdso" = "no"; then
        case $OS in
            *os390)
                tempdso="yes"
                ;;
        esac
    fi
 ] )

if test "$tempdso" = "no"; then
    aprdso="0"
else
    aprdso="1"
    MODULES="$MODULES dso"
fi

AC_SUBST(aprdso)

dnl #----------------------------- Checking for Threads
echo $ac_n "${nl}Checking for Threads...${nl}"

if test -z "$enable_threads"; then
	AC_ARG_ENABLE(threads,
    	[  --enable-threads        Enable threading support in APR.],
    	[ enable_threads=$enableval] ,
    	[ CHECK_PTHREADS_H([ enable_threads="pthread" ] ,
        	           [ enable_threads="no" ] ) ] )
fi

if test "$enable_threads" = "no"; then
echo "Don't enable threads"
    threads="0"
    pthreadh="0"
    pthreadser="0"
else
    REENTRANCY_FLAGS
    if test "$enable_threads" = "pthread"; then
# We have specified pthreads for our threading library, just make sure
# that we have everything we need
      PTHREADS_CHECK
      CHECK_PTHREADS_H([
          threads="1"
          pthreadh="1"
          pthreadser="1"
          AC_DEFINE(USE_THREADS) ], [
          threads="0"
          pthreadh="0"
          pthreadser="0" ] )
    elif test "$enable_threads" = "system_threads"; then
        threads="1"
        pthreadh="0"
        pthreadser="0"
    else
# We basically specified that we wanted threads, but not how to implement
# them.  In this case, just look for pthreads.  In the future, we can check
# for other threading libraries as well.
      PTHREADS_CHECK
      CHECK_PTHREADS_H([
          threads="1"
          pthreadh="1"
          pthreadser="1"
          AC_DEFINE(USE_THREADS) ], [
          threads="0"
          pthreadser="0"
          pthreadh="0" ] )
    fi
fi

if test "$pthreadh" = "1"; then
    APR_CHECK_PTHREAD_GETSPECIFIC_TWO_ARGS
    APR_CHECK_PTHREAD_ATTR_GETDETACHSTATE_ONE_ARG
    AC_CHECK_FUNCS(pthread_key_delete)
fi

ac_cv_define_READDIR_IS_THREAD_SAFE=no
if test "$threads" = "1"; then
    echo "APR will use threads"
    AC_CHECK_LIB(c_r, readdir, AC_DEFINE(READDIR_IS_THREAD_SAFE))
else
    echo "APR will be non-threaded"
fi

AC_SUBST(threads)

dnl THIS MUST COME AFTER THE THREAD TESTS - FreeBSD doesn't always have a
dnl threaded poll()

AC_CHECK_FUNCS(poll)

dnl #----------------------------- Checking for Processes
echo $ac_n "${nl}Checking for Processes...${nl}"

AC_CHECK_FUNCS(waitpid)

AC_ARG_ENABLE(other-child,
  [  --enable-other-child    Enable reliable child processes ],
  [ if test "$enableval" = "yes"; then
        oc="1"
    else
        oc="0"
    fi ],
  [ oc=1 ] ) 
  
AC_SUBST(oc) 

AC_CACHE_CHECK(struct rlimit,ac_cv_struct_rlimit,[
AC_TRY_RUN([
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
main()
{
    struct rlimit limit;
    limit.rlim_cur = 0;
    limit.rlim_max = 0;
    exit(0);
}], [
    ac_cv_struct_rlimit=yes ], [
    ac_cv_struct_rlimit=no ], [
    ac_cv_struct_rlimit=no ] ) ] )
struct_rlimit=0
test "x$ac_cv_struct_rlimit" = xyes && struct_rlimit=1
AC_SUBST(struct_rlimit)

dnl #----------------------------- Checking for Locking Characteristics 
echo $ac_n "${nl}Checking for Locking...${nl}"

# It's stupid, but not all platforms have union semun, even those that need it.
AC_MSG_CHECKING(for union semun in sys/sem.h)
AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
],[
union semun arg;
semctl(0, 0, 0, arg);
], [have_union_semun="1" union_semun=yes ]
msg=yes, [
have_union_semun="0"
msg=no ] )
AC_MSG_RESULT([$msg])
AC_SUBST(have_union_semun)

dnl Checks for libraries.
AC_CHECK_DEFINE(LOCK_EX, sys/file.h)
AC_CHECK_DEFINE(F_SETLK, fcntl.h)
AC_CHECK_DEFINE(CODESET, langinfo.h)
AC_CHECK_DEFINE(isascii, ctype.h)
# We are assuming that if the platform doesn't have POLLIN, it doesn't have
# any POLL definitions.
AC_CHECK_DEFINE_FILES(POLLIN, poll.h sys/poll.h)

if test "$threads" = "1"; then
    AC_CHECK_DEFINE(PTHREAD_PROCESS_SHARED, pthread.h)
fi

AC_BEGIN_DECISION([ap_lock implementation method])
AC_IFALLYES(custom:union_semun,
            AC_DECIDE(USE_SYSVSEM_SERIALIZE, [SysV IPC semget()]))
AC_IFALLYES(header:sys/file.h define:LOCK_EX,
            AC_DECIDE(USE_FLOCK_SERIALIZE, [4.2BSD-style flock()]))
AC_IFALLYES(header:fcntl.h define:F_SETLK,
            AC_DECIDE(USE_FCNTL_SERIALIZE, [SVR4-style fcntl()]))
AC_IFALLYES(header:pthread.h define:PTHREAD_PROCESS_SHARED dnl
            custom:with_pthread_cross,
            AC_DECIDE(USE_PROC_PTHREAD_SERIALIZE, [pthread mutex]))
dnl AC_DECISION_FORCE(USE_FCNTL_SERIALIZE)
AC_END_DECISION
AC_DEFINE_UNQUOTED($ac_decision)

flockser="0"
sysvser="0"
procpthreadser="0"
fcntlser="0"
case $ac_decision in
    USE_FLOCK_SERIALIZE )
        flockser="1"
        ;;
    USE_SYSVSEM_SERIALIZE )
        sysvser="1"
        ;;
    USE_FCNTL_SERIALIZE )
        fcntlser="1"
        ;;
    USE_PROC_PTHREAD_SERIALIZE )
        procpthreadser="1"
        ;;
esac

AC_SUBST(flockser)
AC_SUBST(sysvser)
AC_SUBST(fcntlser)
AC_SUBST(procpthreadser)
AC_SUBST(pthreadser)

dnl #----------------------------- Checking for /dev/random 
AC_MSG_CHECKING(for /dev/random)

if test -r "/dev/random"; then
    AC_DEFINE(DEV_RANDOM, [/dev/random])
    AC_MSG_RESULT(/dev/random)
    rand="1"
elif test -r "/dev/urandom"; then
    AC_DEFINE(DEV_RANDOM, [/dev/urandom])
    AC_MSG_RESULT(/dev/urandom)
    rand="1"
else
    AC_MSG_RESULT(not found);
    if test "$ac_cv_lib_truerand_main" = "yes"; then
        rand="1"
    else
        rand="0"
    fi
fi

AC_SUBST(rand)
dnl #----------------------------- Checking for Time Support 
echo $ac_n "${nl}Checking for Time Support...${nl}"
AC_CACHE_CHECK([for tm_gmtoff in struct tm], ac_cv_struct_tm_gmtoff,
[AC_TRY_COMPILE([#include <sys/types.h>
#include <$ac_cv_struct_tm>], [struct tm tm; tm.tm_gmtoff;],
  ac_cv_struct_tm_gmtoff=yes, ac_cv_struct_tm_gmtoff=no)])

if test "$ac_cv_struct_tm_gmtoff" = "yes"; then
    AC_DEFINE(HAVE_GMTOFF)
fi

dnl #----------------------------- Checking for Networking Support 
echo $ac_n "${nl}Checking for Networking support...${nl}"
AC_MSG_CHECKING(looking for in_addr in netinet/in.h)
AC_TRY_COMPILE([
#include <sys/types.h>
#include <netinet/in.h>
],[
struct in_addr arg;
arg.s_addr = htonl(INADDR_ANY);
], [ have_in_addr="1" 
msg=yes ] , [ have_in_addr="0"
msg=no ])
AC_MSG_RESULT([$msg])

if test "x$file_as_socket" = "x" ; then
    file_as_socket="1";
fi

AC_SUBST(have_in_addr)
AC_SUBST(file_as_socket)

APR_CHECK_SOCKADDR_SA_LEN

APR_CHECK_GETHOSTBYNAME_NAS

echo $ac_n "${nl}Checking for IPv6 Networking support...${nl}"
dnl # Start of checking for IPv6 support...
AC_SEARCH_LIBS(getaddrinfo, inet6)
AC_CHECK_FUNCS(getaddrinfo)
AC_CHECK_FUNCS(getipnodebyname)
AC_CHECK_FUNCS(getipnodebyaddr)
APR_CHECK_SOCKADDR_IN6
AC_SUBST(have_sockaddr_in6)

dnl #----------------------------- Construct the files

AC_SUBST(LDLIBS)
AC_SUBST(OPTIM)
AC_SUBST(RANLIB)
AC_SUBST(AR)
AC_SUBST(RM)
AC_SUBST(OSDIR)
AC_SUBST(DEFAULT_OSDIR)
AC_SUBST(LIBPREFIX)
AC_SUBST(EXEEXT)
AC_SUBST(THREAD_CPPFLAGS)
AC_SUBST(THREAD_CFLAGS)

echo "${nl}Construct Makefiles and header files."
MAKEFILE1="Makefile lib/Makefile strings/Makefile passwd/Makefile tables/Makefile"
SUBDIRS="lib strings passwd tables "
for dir in $MODULES
do
    test -d $dir || $MKDIR -p $dir
    if test -f $srcdir/$dir/$OSDIR/Makefile.in; then
        MAKEFILE2="$MAKEFILE2 $dir/$OSDIR/Makefile "
        SUBDIRS="$SUBDIRS $dir/$OSDIR "
    else
        MAKEFILE2="$MAKEFILE2 $dir/$DEFAULT_OSDIR/Makefile "
        SUBDIRS="$SUBDIRS $dir/$DEFAULT_OSDIR "
    fi
done

MAKEFILE3="test/Makefile"
AC_SUBST(SUBDIRS)
AC_SUBST(MODULES)

if test -n "$CPPFLAGS"; then
  CFLAGS="$CFLAGS $CPPFLAGS"
fi

SAVE_FILES="include/apr.h include/apr_private.h"

for i in $SAVE_FILES; do
  test -r $i && mv $i $i.save
done

AC_OUTPUT($MAKEFILE1 $MAKEFILE2 $MAKEFILE3 include/apr.h APRVARS,[

SAVE_FILES="include/apr.h include/apr_private.h"

for i in $SAVE_FILES; do
  if cmp -s $i $i.save 2>/dev/null; then
    mv $i.save $i
    echo "$i is unchanged"
  fi
  rm -f $i.save
done

])

dnl #----------------------------- Fixup Makefiles for VPATH support

changequote({,})

if test -n "$USE_VPATH"; then
  if test -n "$USE_MM"; then
    MAKEFILE3="$MAKEFILE3 $mm_dir/Makefile"
  fi
  for makefile in $MAKEFILE1 $MAKEFILE2 $MAKEFILE3; do
    dir=`echo $makefile|sed 's%[^/][^/]*$%%'`
    (cat <<EOF
srcdir = $abs_srcdir/$dir
VPATH  = $abs_srcdir/$dir

EOF
)    |  cat - $makefile | \
        sed -e 's#-I\($(INCDIR[0-9]*)\)#-I\1 -I$(srcdir)/\1#g' > tmp
    cp tmp $makefile
  done
  if test -n "$USE_MM"; then
    cat $mm_dir/Makefile | \
       sed \
       -e 's#\($(CFLAGS)\)#\1 -I$(srcdir) -I.#' \
       -e '/mm_global\.c/d' \
       > tmp
    cp tmp $mm_dir/Makefile
  fi
  rm -f tmp
fi

changequote([,])