lib: util: Add sys_valid_io_range()

[Samba.git] / source3 / wscript

#!/usr/bin/env python

srcdir = ".."

import sys, os
from optparse import SUPPRESS_HELP
sys.path.insert(0, srcdir + "/buildtools/wafsamba")
sys.path.insert(0, "source3")

from waflib import Options, Logs, Errors
import wafsamba
import build.charset
from wafsamba import samba_utils
from samba_utils import TO_LIST
import samba3
from waflib.Tools import bison

default_prefix = Options.default_prefix = '/usr/local/samba'

def options(opt):

    opt.add_option('--with-static-modules',
                   help=("Comma-separated list of names of modules to statically link in. "+
                         "May include !module to disable 'module'. "+
                         "Can be '!FORCED' to disable all non-required static only modules. "+
                         "Can be '!DEFAULT' to disable all modules defaulting to a static build. "+
                         "Can be 'ALL' to build all default shared modules static. "+
                         "The most specific one wins, while the order is ignored "+
                         "and --with-static-modules is evaluated before "+
                         "--with-shared-modules"),
                   action="store", dest='static_modules', default=None)
    opt.add_option('--with-shared-modules',
                   help=("Comma-separated list of names of modules to build shared. "+
                         "May include !module to disable 'module'. "+
                         "Can be '!FORCED' to disable all non-required shared only modules. "+
                         "Can be '!DEFAULT' to disable all modules defaulting to a shared build. "+
                         "Can be 'ALL' to build all default static modules shared. "+
                         "The most specific one wins, while the order is ignored "+
                         "and --with-static-modules is evaluated before "+
                         "--with-shared-modules"),
                   action="store", dest='shared_modules', default=None)

    opt.samba_add_onoff_option('winbind')
    opt.samba_add_onoff_option('ads')
    opt.samba_add_onoff_option('ldap')
    opt.samba_add_onoff_option('cups', with_name="enable", without_name="disable")
    opt.samba_add_onoff_option('iprint', with_name="enable", without_name="disable")
    opt.samba_add_onoff_option('pam')
    opt.samba_add_onoff_option('quotas', default=None)
    opt.samba_add_onoff_option('sendfile-support', default=None)
    opt.samba_add_onoff_option('utmp')
    opt.samba_add_onoff_option('avahi', with_name="enable", without_name="disable")
    opt.samba_add_onoff_option('iconv')
    opt.samba_add_onoff_option('acl-support')
    opt.samba_add_onoff_option('dnsupdate')
    opt.samba_add_onoff_option('syslog')
    opt.samba_add_onoff_option('automount')
    opt.samba_add_onoff_option('dmapi', default=None) # None means autodetection
    opt.samba_add_onoff_option('fam', default=None) # None means autodetection
    opt.samba_add_onoff_option('profiling-data', default=False)
    opt.samba_add_onoff_option('libarchive', default=True)

    opt.samba_add_onoff_option('cluster-support', default=False)

    opt.samba_add_onoff_option('regedit', default=None)

    opt.samba_add_onoff_option('fake-kaserver',
                          help=("Include AFS fake-kaserver support"), default=False)

    opt.add_option('--with-libcephfs',
                   help=("Directory under which libcephfs is installed"),
                   action="store", dest='libcephfs_dir', default=None)

    opt.samba_add_onoff_option('glusterfs', with_name="enable", without_name="disable", default=True)
    opt.samba_add_onoff_option('cephfs', with_name="enable", without_name="disable", default=True)

    opt.add_option('--enable-vxfs',
                  help=("enable support for VxFS (default=no)"),
                  action="store_true", dest='enable_vxfs', default=False)

    # default = None means autodetection
    opt.samba_add_onoff_option('spotlight', with_name="enable", without_name="disable", default=None)

def configure(conf):
    default_static_modules = []
    default_shared_modules = []
    required_static_modules = []
    forced_static_modules = []
    forced_shared_modules = []

    if Options.options.developer:
        conf.ADD_CFLAGS('-DDEVELOPER -DDEBUG_PASSWORD')
        conf.env.developer = True

    if sys.platform != 'openbsd5':
        conf.ADD_LDFLAGS("-Wl,--export-dynamic", testflags=True)

    # We crash without vfs_default
    # and vfs_not_implemented provides helper function
    # for other modules
    required_static_modules.extend(TO_LIST('vfs_default vfs_not_implemented'))

    conf.CHECK_HEADERS('netdb.h')
    conf.CHECK_HEADERS('linux/falloc.h linux/ioctl.h')

    conf.CHECK_FUNCS('getcwd fchown chmod fchmod mknod mknodat')
    conf.CHECK_FUNCS('strtol strchr strupr chflags')
    conf.CHECK_FUNCS('getrlimit fsync setpgid')
    conf.CHECK_FUNCS('setsid glob strpbrk crypt16 getauthuid')
    conf.CHECK_FUNCS('innetgr')
    conf.CHECK_FUNCS('initgroups select poll rdchk getgrnam getgrent pathconf')
    conf.CHECK_FUNCS('setpriv setgidx setuidx setgroups syscall sysconf')
    conf.CHECK_FUNCS('atexit grantpt posix_openpt fallocate')
    conf.CHECK_FUNCS('fseeko setluid')
    conf.CHECK_FUNCS('getpwnam', headers='sys/types.h pwd.h')
    conf.CHECK_FUNCS('fdopendir')
    conf.CHECK_FUNCS('fstatat')
    conf.CHECK_FUNCS('getpwent_r setenv clearenv strcasecmp fcvt fcvtl')
    conf.CHECK_FUNCS('syslog vsyslog timegm setlocale')
    conf.CHECK_FUNCS('lutimes futimes utimensat futimens')
    conf.CHECK_FUNCS('mlock munlock mlockall munlockall')
    conf.CHECK_FUNCS('memalign posix_memalign hstrerror')
    conf.CHECK_FUNCS_IN('yp_get_default_domain', 'nsl')
    conf.CHECK_FUNCS_IN('dn_expand _dn_expand __dn_expand', 'resolv')
    conf.CHECK_FUNCS_IN('dn_expand', 'inet')
    conf.CHECK_DECLS('readahead', reverse=True, headers='fcntl.h')

    if conf.CHECK_CODE('''
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
long ret = splice(0,0,1,0,400,SPLICE_F_MOVE);
''',
        'HAVE_LINUX_SPLICE',
        headers='fcntl.h'):
        conf.CHECK_DECLS('splice', reverse=True, headers='fcntl.h')

    # Check for inotify support (Skip if we are SunOS)
    #NOTE: illumos provides sys/inotify.h but is not an exact match for linux
    host_os = sys.platform
    if host_os.rfind('sunos') == -1:
        conf.CHECK_HEADERS('sys/inotify.h')
        if conf.env.HAVE_SYS_INOTIFY_H:
           conf.DEFINE('HAVE_INOTIFY', 1)

    # Check for kernel change notify support
    conf.CHECK_CODE('''
#ifndef F_NOTIFY
#define F_NOTIFY 1026
#endif
main() {
        exit(fcntl(open("/tmp", O_RDONLY), F_NOTIFY, 0) == -1 ?  1 : 0);
}''', 'HAVE_KERNEL_CHANGE_NOTIFY', addmain=False, execute=True,
        headers='fcntl.h signal.h',
        msg="Checking for kernel change notify support")

    # Check for Linux kernel oplocks
    conf.CHECK_CODE('''
#include <sys/types.h>
#include <fcntl.h>
#include <signal.h>
#ifndef F_GETLEASE
#define F_GETLEASE 1025
#endif
main() {
        exit(fcntl(open("/tmp", O_RDONLY), F_GETLEASE, 0) == -1 ?  1 : 0);
}''', 'HAVE_KERNEL_OPLOCKS_LINUX', addmain=False, execute=True,
        msg="Checking for Linux kernel oplocks")

    # Check for kernel share modes
    conf.CHECK_CODE('''
#include <sys/types.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/file.h>
#ifndef LOCK_MAND
#define LOCK_MAND        32
#define LOCK_READ        64
#endif
main() {
        exit(flock(open("/dev/null", O_RDWR), LOCK_MAND|LOCK_READ) != 0);
}''', 'HAVE_KERNEL_SHARE_MODES', addmain=False, execute=True,
        msg="Checking for kernel share modes")

    # check for fam libs
    samba_fam_libs=None
    check_for_fam=False
    if Options.options.with_fam is None:
        check_for_fam=True
    elif Options.options.with_fam == True:
        check_for_fam=True

    if check_for_fam and conf.CHECK_HEADERS('fam.h'):
        if conf.CHECK_FUNCS_IN('FAMOpen2', 'fam'):
            samba_fam_libs='fam'
        elif conf.CHECK_FUNCS_IN('FAMOpen2', 'fam C'):
            samba_fam_libs='fam C'
        conf.CHECK_TYPE('enum FAMCodes', headers='fam.h',
            define='HAVE_FAM_H_FAMCODES_TYPEDEF',
            msg='Checking whether enum FAMCodes is available')
        conf.CHECK_FUNCS_IN('FAMNoExists', 'fam')

    if samba_fam_libs is not None:
        conf.DEFINE('SAMBA_FAM_LIBS', samba_fam_libs)
        conf.DEFINE('HAVE_FAM', 1)
    else:
        if Options.options.with_fam == True:
            conf.fatal('FAM support requested, but no suitable FAM library found')
        elif check_for_fam:
            Logs.warn('no suitable FAM library found')

    # check for libarchive (tar command in smbclient)
    # None means autodetect, True/False means enable/disable
    conf.SET_TARGET_TYPE('archive', 'EMPTY')
    if Options.options.with_libarchive is not False:
        Logs.info("Checking for libarchive existence")
        if conf.CHECK_HEADERS('archive.h') and conf.CHECK_LIB('archive', shlib=True):
            conf.CHECK_FUNCS_IN('archive_read_support_filter_all archive_read_free', 'archive')
        else:
            conf.fatal("libarchive support not found. "
                       "Try installing libarchive-dev or libarchive-devel. "
                       "Otherwise, use --without-libarchive to "
                       "build without libarchive support. "
                       "libarchive support is required for the smbclient "
                       "tar-file mode")
    elif conf.CONFIG_GET('ENABLE_SELFTEST'):
        raise Errors.WafError('libarchive library required for '
                             '--enable-selftest')


    # check for DMAPI libs
    if Options.options.with_dmapi == False:
        have_dmapi = False
    else:
        have_dmapi = True
        Logs.info("Checking for DMAPI library existence")
        samba_dmapi_lib = ''
        if conf.CHECK_FUNCS_IN('dm_get_eventlist', 'dm'):
            samba_dmapi_lib = 'dm'
        else:
            if conf.CHECK_FUNCS_IN('dm_get_eventlist', 'jfsdm'):
                samba_dmapi_lib = 'jfsdm'
            else:
                if conf.CHECK_FUNCS_IN('dm_get_eventlist', 'dmapi'):
                    samba_dmapi_lib = 'dmapi'
                else:
                    if conf.CHECK_FUNCS_IN('dm_get_eventlist', 'xdsm'):
                        samba_dmapi_lib = 'xdsm'
        # only bother to test headers and compilation when a candidate
        # library has been found
        if samba_dmapi_lib == '':
            have_dmapi = False
            broken_dmapi = "no suitable DMAPI library found"

        if have_dmapi:
            conf.CHECK_HEADERS('sys/dmi.h xfs/dmapi.h sys/jfsdmapi.h sys/dmapi.h dmapi.h')
            conf.CHECK_CODE('''
#include <time.h>      /* needed by Tru64 */
#include <sys/types.h> /* needed by AIX */
#ifdef HAVE_XFS_DMAPI_H
#include <xfs/dmapi.h>
#elif defined(HAVE_SYS_DMI_H)
#include <sys/dmi.h>
#elif defined(HAVE_SYS_JFSDMAPI_H)
#include <sys/jfsdmapi.h>
#elif defined(HAVE_SYS_DMAPI_H)
#include <sys/dmapi.h>
#elif defined(HAVE_DMAPI_H)
#include <dmapi.h>
#endif

/* This link test is designed to fail on IRI 6.4, but should
 * succeed on Linux, IRIX 6.5 and AIX.
 */
int main(int argc, char **argv)
{
        char * version;
        dm_eventset_t events;
        /* This doesn't take an argument on IRIX 6.4. */
        dm_init_service(&version);
        /* IRIX 6.4 expects events to be a pointer. */
        DMEV_ISSET(DM_EVENT_READ, events);

        return 0;
}
''',
            'USEABLE_DMAPI_LIBRARY',
            addmain=False,
            execute=False,
            lib=samba_dmapi_lib,
            msg='Checking whether DMAPI lib '+samba_dmapi_lib+' can be used')
            if not conf.CONFIG_SET('USEABLE_DMAPI_LIBRARY'):
                have_dmapi = False
                broken_dmapi = "no usable DMAPI library found"

    if have_dmapi:
        Logs.info("Building with DMAPI support.")
        conf.env['dmapi_lib'] = samba_dmapi_lib
        conf.DEFINE('USE_DMAPI', 1)
    else:
        if Options.options.with_dmapi == False:
            Logs.info("Building without DMAPI support (--without-dmapi).")
        elif Options.options.with_dmapi == True:
            Logs.error("DMAPI support not available: " + broken_dmapi)
            conf.fatal('DMAPI support requested but not found.');
        else:
            Logs.warn("Building without DMAPI support: " + broken_dmapi)
        conf.env['dmapi_lib'] = ''

    # Check for various members of the stat structure
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_blocks', define='HAVE_STAT_ST_BLOCKS',
                                headers='sys/stat.h')
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_blksize', define='HAVE_STAT_ST_BLKSIZE',
                                headers='sys/stat.h')
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_flags', define='HAVE_STAT_ST_FLAGS',
                                headers='sys/types.h sys/stat.h unistd.h')

    if conf.env.HAVE_BLKCNT_T:
        conf.CHECK_CODE('''
        static int test_array[1 - 2 * !(((long int)(sizeof(blkcnt_t))) <= 4)];''',
                'SIZEOF_BLKCNT_T_4',
                headers='replace.h sys/types.h sys/stat.h unistd.h',
                msg="Checking whether blkcnt_t is 32 bit")

    # If sizeof is 4 it can't be 8
    if conf.env.HAVE_BLKCNT_T:
        if not conf.CONFIG_SET('SIZEOF_BLKCNT_T_4'):
            conf.CHECK_CODE('''
            static int test_array[1 - 2 * !(((long int)(sizeof(blkcnt_t))) <= 8)];''',
                    'SIZEOF_BLKCNT_T_8',
                    headers='replace.h sys/types.h sys/stat.h unistd.h',
                    msg="Checking whether blkcnt_t is 64 bit")

    # Check for POSIX capability support
    conf.CHECK_FUNCS_IN('cap_get_proc', 'cap', headers='sys/capability.h')

    if conf.env.HAVE_SYS_CAPABILITY_H:
        conf.CHECK_CODE('''
        cap_t cap;
        cap_value_t vals[1];
        if (!(cap = cap_get_proc())) exit(1);
        vals[0] = CAP_CHOWN;
        cap_set_flag(cap, CAP_INHERITABLE, 1, vals, CAP_CLEAR);
        cap_set_proc(cap);''',
                        'HAVE_POSIX_CAPABILITIES', execute=True, lib="cap",
                        headers='sys/capability.h',
                        msg="Checking whether POSIX capabilities are available")

    conf.CHECK_CODE('int i;', 'BROKEN_NISPLUS_INCLUDE_FILES',
                    headers='sys/types.h sys/acl.h rpcsvc/nis.h',
                    msg="Checking for broken nisplus include files")

    # Check if the compiler will optimize out functions
    conf.CHECK_CODE('''
#include <sys/types.h>
size_t __unsafe_string_function_usage_here_size_t__(void);
#define CHECK_STRING_SIZE(d, len) (sizeof(d) != (len) && sizeof(d) != sizeof(char *))
static size_t push_string_check_fn(void *dest, const char *src, size_t dest_len) {
        return 0;
}

#define push_string_check(dest, src, dest_len) \
    (CHECK_STRING_SIZE(dest, dest_len) \
    ? __unsafe_string_function_usage_here_size_t__()    \
    : push_string_check_fn(dest, src, dest_len))

int main(int argc, char **argv) {
    char outbuf[1024];
    char *p = outbuf;
    const char *foo = "bar";
    p += 31 + push_string_check(p + 31, foo, sizeof(outbuf) - (p + 31 - outbuf));
    return 0;
}''', 'HAVE_COMPILER_WILL_OPTIMIZE_OUT_FNS',
            addmain=False,
            add_headers=False,
            msg="Checking if the compiler will optimize out functions")

    # Check if the compiler supports the LL suffix on long long integers
    # AIX needs this
    conf.CHECK_CODE('long long i = 0x8000000000LL', 'COMPILER_SUPPORTS_LL',
                    headers='stdio.h',
                    msg="Checking for LL suffix on long long integers")

    conf.CHECK_FUNCS('''
DNSServiceRegister
atexit
chflags
chmod
crypt16
devnm
dirfd
endmntent
execl
fchmod
fchown
fcvt
fcvtl
fseeko
fsync
futimens
futimes
getauthuid
getcwd
getgrent
getgrnam
getgrouplist
getgrset
getmntent
getpagesize
getpwanam
getpwent_r
getrlimit
glob
grantpt
hstrerror
initgroups
innetgr
llseek
lutimes
memalign
mknod
mlock
mlockall
munlock
munlockall
pathconf poll
posix_memalign
pread
pwrite
rdchk
select
setenv
setgidx
setgroups
setlocale
setluid
setmntent
setpgid
setpriv
setsid
setuidx
statvfs
strcasecmp
strchr
strpbrk
strsignal
strtol
strupr
sysconf
sysctl
sysctlbyname
syslog
timegm
utimensat
vsyslog
''')

    conf.CHECK_SAMBA3_CHARSET() # see build/charset.py

    # FIXME: these should be tests for features, but the old build system just
    # checks for OSes.
    host_os = sys.platform
    Logs.info("building on %s" % host_os)

    # Python doesn't have case switches... :/
    # FIXME: original was *linux* | gnu* | k*bsd*-gnu | kopensolaris*-gnu | *qnx*)
    # the search for .rfind('gnu') covers gnu* and *-gnu is that too broad?

    conf.SET_TARGET_TYPE('sunacl', 'EMPTY')
    if (host_os.rfind('linux') > -1) or (host_os.rfind('gnu') > -1) or (host_os.rfind('qnx') > -1):
        if host_os.rfind('linux') > -1:
            conf.DEFINE('LINUX', '1')
        elif host_os.rfind('qnx') > -1:
            conf.DEFINE('QNX', '1')
        conf.DEFINE('STAT_ST_BLOCKSIZE', '512')
    elif (host_os.rfind('darwin') > -1):
        conf.DEFINE('DARWINOS', 1)
        conf.ADD_CFLAGS('-fno-common')
        conf.DEFINE('STAT_ST_BLOCKSIZE', '512')
    elif (host_os.rfind('freebsd') > -1):
        conf.DEFINE('FREEBSD', 1)
        if conf.CHECK_HEADERS('sunacl.h'):
            conf.DEFINE('HAVE_FREEBSD_SUNACL_H', '1')
            conf.CHECK_FUNCS_IN(['acl'], 'sunacl')
        conf.DEFINE('STAT_ST_BLOCKSIZE', '512')
    elif (host_os.rfind('irix') > -1):
        conf.DEFINE('IRIX', 1)
        conf.DEFINE('STAT_ST_BLOCKSIZE', '512')
    elif (host_os.rfind('aix') > -1):
        conf.DEFINE('AIX', 1)
        conf.DEFINE('STAT_ST_BLOCKSIZE', 'DEV_BSIZE')
    elif (host_os.rfind('hpux') > -1):
        conf.DEFINE('HPUX', 1)
        conf.DEFINE('STAT_ST_BLOCKSIZE', '8192')
    elif (host_os.rfind('osf') > -1):
        conf.DEFINE('OSF1', 1)
        conf.DEFINE('STAT_ST_BLOCKSIZE', '512')

    # FIXME: Add more checks here.
    else:
        conf.DEFINE('STAT_ST_BLOCKSIZE', '512')

    if Options.options.with_acl_support:
        if (host_os.rfind('hpux') > -1):
                Logs.info('Using HPUX ACLs')
                conf.DEFINE('HAVE_HPUX_ACLS',1)
                conf.DEFINE('POSIX_ACL_NEEDS_MASK',1)
                default_static_modules.extend(TO_LIST('vfs_hpuxacl'))
        elif (host_os.rfind('aix') > -1):
                Logs.info('Using AIX ACLs')
                conf.DEFINE('HAVE_AIX_ACLS',1)
                default_static_modules.extend(TO_LIST('vfs_aixacl vfs_aixacl2'))
        elif (host_os.rfind('darwin') > -1):
            Logs.warn('ACLs on Darwin currently not supported')
            conf.fatal("ACL support not available on Darwin/MacOS. "
                       "Use --without-acl-support for building without "
                       "ACL support. "
                       "ACL support is required to change permissions "
                       "from Windows clients.")
        else:
            conf.CHECK_FUNCS_IN(['acl_get_file'], 'acl')
            if conf.CHECK_CODE('''
acl_t acl;
int entry_id;
acl_entry_t *entry_p;
return acl_get_entry(acl, entry_id, entry_p);
''',
                        'HAVE_POSIX_ACLS',
                        headers='sys/types.h sys/acl.h', link=False,
                        msg="Checking for POSIX ACL support") :
                conf.CHECK_CODE('''
acl_permset_t permset_d;
acl_perm_t perm;
return acl_get_perm_np(permset_d, perm);
''',
                        'HAVE_ACL_GET_PERM_NP',
                        headers='sys/types.h sys/acl.h', link=True,
                        msg="Checking whether acl_get_perm_np() is available")
                # source3/lib/sysacls.c calls posixacl_sys_acl_get_file()
                required_static_modules.extend(TO_LIST('vfs_posixacl'))
                conf.CHECK_VARIABLE('ACL_EVERYONE', headers='sys/acl.h')
            elif conf.CHECK_FUNCS_IN(['facl'], 'sec'):
                Logs.info('Using solaris or UnixWare ACLs')
                conf.DEFINE('HAVE_SOLARIS_UNIXWARE_ACLS',1)
                default_static_modules.extend(TO_LIST('vfs_solarisacl'))
            elif conf.CHECK_FUNCS_IN(['acl_get_fd'], 'pacl'):
                Logs.info('Using Tru64 ACLs')
                conf.DEFINE('HAVE_TRU64_ACLS',1)
                default_static_modules.extend(TO_LIST('vfs_tru64acl'))
            else:
                conf.fatal("ACL support not found. Try installing libacl1-dev "
                           "or libacl-devel.  "
                           "Otherwise, use --without-acl-support to build "
                           "without ACL support. "
                           "ACL support is required to change permissions from "
                           "Windows clients.")

    if conf.CHECK_FUNCS('dirfd'):
        conf.DEFINE('HAVE_DIRFD_DECL', 1)

    conf.CHECK_CODE('struct statfs fsd; fsid_t fsid = fsd.f_fsid; return statfs(".", &fsd);',
                    'HAVE_STATFS_F_FSID',
                    msg="vfs_fileid checking for statfs() and struct statfs.f_fsid",
                    headers='sys/types.h sys/statfs.h',
                    execute=True)

    if conf.CONFIG_SET('HAVE_FALLOCATE'):
        conf.CHECK_CODE('''
                int ret = fallocate(0, FALLOC_FL_KEEP_SIZE, 0, 10);''',
                'HAVE_LINUX_FALLOCATE',
                msg="Checking whether the Linux 'fallocate' function is available",
                headers='unistd.h sys/types.h fcntl.h linux/falloc.h')
        conf.CHECK_CODE('''
                int ret = fallocate(0, FALLOC_FL_PUNCH_HOLE, 0, 10);''',
                'HAVE_FALLOC_FL_PUNCH_HOLE',
                msg="Checking whether Linux 'fallocate' supports hole-punching",
                headers='unistd.h sys/types.h fcntl.h linux/falloc.h')

    conf.CHECK_CODE('''
            int ret = lseek(0, 0, SEEK_HOLE);
            ret = lseek(0, 0, SEEK_DATA);''',
            'HAVE_LSEEK_HOLE_DATA',
            msg="Checking whether lseek supports hole/data seeking",
            headers='unistd.h sys/types.h')

    conf.CHECK_CODE('''
                ssize_t err = readahead(0,0,0x80000);''',
                'HAVE_LINUX_READAHEAD',
                msg="Checking whether Linux readahead is available",
                headers='unistd.h fcntl.h')
    conf.CHECK_DECLS('readahead', headers='fcntl.h', always=True)

    conf.CHECK_CODE('int fd = openat(AT_FDCWD, ".", O_RDONLY);',
                'HAVE_OPENAT',
                msg='Checking for openat',
                headers='fcntl.h')

    conf.CHECK_CODE('''
struct msghdr msg;
union {
        struct cmsghdr cm;
        char control[CMSG_SPACE(sizeof(int))];
} control_un;
msg.msg_control = control_un.control;
msg.msg_controllen = sizeof(control_un.control);
''',
        'HAVE_STRUCT_MSGHDR_MSG_CONTROL',
        msg='Checking if we can use msg_control for passing file descriptors',
        headers='sys/types.h stdlib.h stddef.h sys/socket.h sys/un.h')
    conf.CHECK_CODE('''
struct msghdr msg;
int fd;
msg.msg_accrights = (caddr_t) &fd;
msg.msg_accrightslen = sizeof(fd);
''',
        'HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS',
        msg='Checking if we can use msg_accrights for passing file descriptors',
        headers='sys/types.h stdlib.h stddef.h sys/socket.h sys/un.h')

    if Options.options.with_winbind:
        conf.env.build_winbind = True
        conf.DEFINE('WITH_WINBIND', '1')

    conf.find_program('awk', var='AWK')

    conf.CHECK_HEADERS('asm/types.h')

    conf.CHECK_CODE('dev_t dev; int i = major(dev); return 0', "HAVE_DEVICE_MAJOR_FN",
                    headers='unistd.h sys/types.h',
                    msg="Checking for major macro")

    conf.CHECK_CODE('dev_t dev; int i = minor(dev); return 0', "HAVE_DEVICE_MINOR_FN",
                    headers='unistd.h sys/types.h',
                    msg="Checking for minor macro")

    conf.CHECK_STRUCTURE_MEMBER('struct dirent', 'd_off',
                                headers='unistd.h sys/types.h dirent.h',
                                define='HAVE_DIRENT_D_OFF')

    if (conf.CONFIG_SET('HAVE_YP_GET_DEFAULT_DOMAIN')):
           conf.DEFINE('HAVE_NETGROUP', '1')

    # Look for CUPS
    if Options.options.with_cups:
        conf.find_program('cups-config', var='CUPS_CONFIG')
        if conf.env.CUPS_CONFIG:
            # we would normally use --libs here, but cups-config incorrectly adds
            # gssapi_krb5 and other libraries to its --libs output. That breaks the use
            # of an in-tree heimdal kerberos
            conf.CHECK_CFG(path=conf.env.CUPS_CONFIG, args="--cflags --ldflags",
                           package="", uselib_store="CUPS")
        conf.CHECK_HEADERS('cups/cups.h cups/language.h', lib='cups')
        conf.CHECK_FUNCS_IN('httpConnect httpConnect2 httpConnectEncrypt', 'cups')
        if conf.CONFIG_SET('HAVE_CUPS_CUPS_H') and conf.CONFIG_SET('HAVE_CUPS_LANGUAGE_H'):
            conf.DEFINE('HAVE_CUPS', '1')
        else:
            conf.undefine('HAVE_CUPS')
            conf.SET_TARGET_TYPE('cups', 'EMPTY')
    else:
        # define an empty subsystem for cups, to allow it to be used as an empty dependency
        conf.SET_TARGET_TYPE('cups', 'EMPTY')

    if Options.options.with_iprint:
        if conf.CONFIG_SET('HAVE_CUPS'):
            conf.DEFINE('HAVE_IPRINT', '1')
        else:
            Logs.warn("--enable-iprint=yes but cups support not sufficient")
    if Options.options.with_syslog:
        conf.DEFINE('WITH_SYSLOG', '1')
    if Options.options.with_automount:
        conf.DEFINE('WITH_AUTOMOUNT', '1')

    # Check for LDAP
    if Options.options.with_ldap:
        conf.CHECK_HEADERS('ldap.h lber.h ldap_pvt.h')
        conf.CHECK_TYPE('ber_tag_t', 'unsigned int', headers='ldap.h lber.h')
        conf.CHECK_FUNCS_IN('ber_scanf ber_sockbuf_add_io', 'lber')
        conf.CHECK_VARIABLE('LDAP_OPT_SOCKBUF', headers='ldap.h')

        # if we LBER_OPT_LOG_PRINT_FN we can intercept ldap logging and print it out
        # for the samba logs
        conf.CHECK_VARIABLE('LBER_OPT_LOG_PRINT_FN',
                            define='HAVE_LBER_LOG_PRINT_FN', headers='lber.h')

        conf.CHECK_FUNCS_IN('ldap_init ldap_init_fd ldap_initialize ldap_set_rebind_proc', 'ldap')
        conf.CHECK_FUNCS_IN('ldap_add_result_entry', 'ldap')

        # Check if ldap_set_rebind_proc() takes three arguments
        if conf.CHECK_CODE('ldap_set_rebind_proc(0, 0, 0)',
                           'LDAP_SET_REBIND_PROC_ARGS',
                           msg="Checking whether ldap_set_rebind_proc takes 3 arguments",
                           headers='ldap.h lber.h', link=False):
            conf.DEFINE('LDAP_SET_REBIND_PROC_ARGS', '3')
        else:
            conf.DEFINE('LDAP_SET_REBIND_PROC_ARGS', '2')

        # last but not least, if ldap_init() exists, we want to use ldap
        if conf.CONFIG_SET('HAVE_LDAP_INIT') and conf.CONFIG_SET('HAVE_LDAP_H'):
            conf.DEFINE('HAVE_LDAP', '1')
            conf.DEFINE('LDAP_DEPRECATED', '1')
            conf.env['HAVE_LDAP'] = '1'
            # if ber_sockbuf_add_io() and LDAP_OPT_SOCKBUF are available, we can add
            # SASL wrapping hooks
            if conf.CONFIG_SET('HAVE_BER_SOCKBUF_ADD_IO') and \
                    conf.CONFIG_SET('HAVE_LDAP_OPT_SOCKBUF'):
                conf.DEFINE('HAVE_LDAP_SASL_WRAPPING', '1')
        else:
            conf.fatal("LDAP support not found. "
                       "Try installing libldap2-dev or openldap-devel. "
                       "Otherwise, use --without-ldap to build without "
                       "LDAP support. "
                       "LDAP support is required for the LDAP passdb backend, "
                       "LDAP idmap backends and ADS. "
                       "ADS support improves communication with "
                       "Active Directory domain controllers.")
    else:
        conf.SET_TARGET_TYPE('ldap', 'EMPTY')
        conf.SET_TARGET_TYPE('lber', 'EMPTY')

    if Options.options.with_ads == False:
        use_ads = False
        use_ads_krb5 = False
        use_ads_ldap = False
    else:
        use_ads = True
        use_ads_krb5 = True
        use_ads_ldap = True
        if not conf.CONFIG_SET('HAVE_ENCTYPE_ARCFOUR_HMAC_MD5') and \
           not conf.CONFIG_SET('HAVE_ENCTYPE_ARCFOUR_HMAC'):
            Logs.warn("arcfour-hmac-md5 encryption type not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_MK_REQ_EXTENDED'):
            Logs.warn("krb5_mk_req_extended not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_GET_HOST_REALM'):
            Logs.warn("krb5_get_host_realm not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_FREE_HOST_REALM'):
            Logs.warn("krb5_free_host_realm not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_FWD_TGT_CREDS'):
            Logs.warn("krb5_fwd_tgt_creds found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_GET_INIT_CREDS_OPT_ALLOC'):
            Logs.warn("krb5_get_init_creds_opt_alloc not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('KRB5_CREDS_OPT_FREE_REQUIRES_CONTEXT'):
            Logs.warn("krb5_get_init_creds_opt_free was not found or was too old in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_GET_RENEWED_CREDS'):
            Logs.warn("krb5_get_renewed_creds not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_PRINCIPAL_COMPARE_ANY_REALM'):
            Logs.warn("krb5_principal_compare_any_realm not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_C_STRING_TO_KEY') and \
           not conf.CONFIG_SET('HAVE_KRB5_STRING_TO_KEY_SALT'):
            Logs.warn("krb5_c_string_to_key not found in -lkrb5")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_PRINCIPAL2SALT') and \
           not conf.CONFIG_SET('HAVE_KRB5_GET_PW_SALT'):
            Logs.warn("no CREATE_KEY_FUNCTIONS detected")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_GET_PERMITTED_ENCTYPES') and \
           not conf.CONFIG_SET('HAVE_KRB5_GET_DEFAULT_IN_TKT_ETYPES'):
            Logs.warn("no GET_ENCTYPES_FUNCTIONS detected")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_KT_FREE_ENTRY') and \
           not conf.CONFIG_SET('HAVE_KRB5_FREE_KEYTAB_ENTRY_CONTENTS'):
            Logs.warn("no KT_FREE_FUNCTION detected")
            use_ads_krb5 = False
        if not conf.CONFIG_SET('HAVE_KRB5_C_VERIFY_CHECKSUM'):
            Logs.warn("krb5_c_verify_checksum_compare not found in -lkrb5")
            use_ads_krb5 = False

        # We don't actually use
        # gsskrb5_extract_authz_data_from_sec_context, but it is a
        # clue that this Heimdal, which does the PAC processing we
        # need on the standard gss_inquire_sec_context_by_oid
        if not conf.CONFIG_SET('HAVE_GSS_GET_NAME_ATTRIBUTE') and \
            not (conf.CONFIG_SET('HAVE_GSSKRB5_EXTRACT_AUTHZ_DATA_FROM_SEC_CONTEXT') and \
                     conf.CONFIG_SET('HAVE_GSS_INQUIRE_SEC_CONTEXT_BY_OID')):
            Logs.warn("need either gss_get_name_attribute or gsskrb5_extract_authz_data_from_sec_context and gss_inquire_sec_context_by_oid in -lgssapi for PAC support")
            use_ads_krb5 = False

        if not conf.CONFIG_SET('HAVE_GSS_KRB5_EXPORT_LUCID_SEC_CONTEXT'):
            Logs.warn("need gss_krb5_export_lucid_sec_context for SPNEGO and gss_wrap support")
            use_ads_krb5 = False

        if use_ads_krb5:
            conf.DEFINE('HAVE_KRB5', '1')
            conf.env['HAVE_KRB5'] = '1'
        else:
            conf.undefine('HAVE_KRB5_H')
            conf.undefine('HAVE_GSSAPI_H')
            conf.undefine('HAVE_GSSAPI_GSSAPI_GENERIC_H')
            conf.undefine('HAVE_GSSAPI_GSSAPI_H')
            use_ads = False

        if not conf.CONFIG_SET('HAVE_LDAP'):
            use_ads = False
            use_ads_ldap = False

    if use_ads:
        conf.DEFINE('WITH_ADS', '1')
        conf.env['HAVE_ADS'] = '1'
        Logs.info("Building with Active Directory support.")
        # these have broken dependencies
        forced_shared_modules.extend(TO_LIST('idmap_ad idmap_rfc2307'))
    elif Options.options.with_ads == False:
        Logs.info("Building without Active Directory support (--without-ads).")
    else:
        if not use_ads_krb5:
            Logs.warn("Active Directory support not available: krb5 libs don't have all required features")
        if not use_ads_ldap:
            Logs.warn("Active Directory support not available: LDAP support is not available.")
        if Options.options.with_ads:
            conf.fatal("Active Directory support not found. Use --without-ads "
                       "for building without Active Directory support. "
                       "ADS support improves communication with "
                       "Active Directory domain controllers.")
        else:
            # this is the auto-mode case
            Logs.warn("Building without Active Directory support.")


    if Options.options.with_utmp:
        conf.env.with_utmp = True
        if not conf.CHECK_HEADERS('utmp.h'): conf.env.with_utmp = False
        conf.CHECK_FUNCS('pututline pututxline updwtmp updwtmpx getutmpx getutxent')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_name', headers='utmp.h',
                                    define='HAVE_UT_UT_NAME')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_user', headers='utmp.h',
                                    define='HAVE_UT_UT_USER')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_id', headers='utmp.h',
                                    define='HAVE_UT_UT_ID')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_host', headers='utmp.h',
                                    define='HAVE_UT_UT_HOST')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_time', headers='utmp.h',
                                    define='HAVE_UT_UT_TIME')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_tv', headers='utmp.h',
                                    define='HAVE_UT_UT_TV')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_type', headers='utmp.h',
                                    define='HAVE_UT_UT_TYPE')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_pid', headers='utmp.h',
                                    define='HAVE_UT_UT_PID')
        conf.CHECK_STRUCTURE_MEMBER('struct utmp', 'ut_exit.e_exit', headers='utmp.h',
                                    define='HAVE_UT_UT_EXIT')
        conf.CHECK_STRUCTURE_MEMBER('struct utmpx', 'ut_syslen', headers='utmpx.h',
                                    define='HAVE_UX_UT_SYSLEN')
        conf.CHECK_STRUCTURE_MEMBER('struct utmpx', 'ut_host', headers='utmpx.h',
                                    define='HAVE_UX_UT_HOST')
        conf.CHECK_CODE('struct utmp utarg; struct utmp *utreturn; utreturn = pututline(&utarg);',
                        'PUTUTLINE_RETURNS_UTMP', headers='utmp.h',
                        msg="Checking whether pututline returns pointer")
        conf.CHECK_SIZEOF(['((struct utmp *)NULL)->ut_line'], headers='utmp.h',
                          define='SIZEOF_UTMP_UT_LINE', critical=False)
        if not conf.CONFIG_SET('SIZEOF_UTMP_UT_LINE'):
            conf.env.with_utmp = False
        elif int(conf.env.SIZEOF_UTMP_UT_LINE) < 15:
            conf.env.with_utmp = False
        if conf.env.with_utmp:
            conf.DEFINE('WITH_UTMP', 1)
        else:
            Logs.warn("--with-utmp but utmp support not sufficient")

    if Options.options.with_avahi:
        conf.env.with_avahi = True
        if not conf.CHECK_HEADERS('avahi-common/watch.h avahi-client/client.h'): conf.env.with_avahi = False
        if not conf.CHECK_FUNCS_IN('avahi_client_new', 'avahi-client'): conf.env.with_avahi = False
        if not conf.CHECK_FUNCS_IN('avahi_strerror', 'avahi-common'): conf.env.with_avahi = False
        if conf.env.with_avahi:
            conf.DEFINE('WITH_AVAHI_SUPPORT', 1)
    else:
        conf.SET_TARGET_TYPE('avahi-common', 'EMPTY')
        conf.SET_TARGET_TYPE('avahi-client', 'EMPTY')

    if Options.options.with_iconv:
        conf.env.with_iconv = True
        if not conf.CHECK_FUNCS_IN('iconv_open', 'iconv', headers='iconv.h'):
            conf.env.with_iconv = False
        if conf.env.with_iconv:
            conf.DEFINE('HAVE_ICONV', 1)

    if Options.options.with_pam:
        use_pam=True
        conf.CHECK_HEADERS('security/pam_appl.h pam/pam_appl.h')
        if not conf.CONFIG_SET('HAVE_SECURITY_PAM_APPL_H') and not conf.CONFIG_SET('HAVE_PAM_PAM_APPL_H'):
            Logs.warn("--with-pam=yes but pam_appl.h not found")
            use_pam=False
        conf.CHECK_FUNCS_IN('pam_get_data', 'pam')
        conf.CHECK_HEADERS('security/pam_modules.h pam/pam_modules.h')
        if not conf.CONFIG_SET('HAVE_SECURITY_PAM_MODULES_H') and not conf.CONFIG_SET('HAVE_PAM_PAM_MODULES_H'):
            Logs.warn("--with-pam=yes but pam_modules.h not found")
            use_pam=False
        conf.CHECK_HEADERS('security/pam_ext.h security/_pam_macros.h')
        conf.CHECK_HEADERS('pam/pam_ext.h pam/_pam_macros.h')
        conf.CHECK_FUNCS_IN('pam_vsyslog', 'pam')
        conf.CHECK_CODE('''
#if defined(HAVE_SECURITY_PAM_APPL_H)
#include <security/pam_appl.h>
#elif defined(HAVE_PAM_PAM_APPL_H)
#include <pam/pam_appl.h>
#endif
pam_set_item(0, PAM_RHOST, 0);
''',
            'HAVE_PAM_RHOST',
            lib='pam',
            msg="Checking whether PAM_RHOST is available");
        conf.CHECK_CODE('''
#if defined(HAVE_SECURITY_PAM_APPL_H)
#include <security/pam_appl.h>
#elif defined(HAVE_PAM_PAM_APPL_H)
#include <pam/pam_appl.h>
#endif
pam_set_item(0, PAM_TTY, 0);
''',
            'HAVE_PAM_TTY',
            lib='pam',
            msg="Checking whether PAM_TTY is available");
        conf.CHECK_CODE('''
#if (!defined(LINUX))

#define PAM_EXTERN extern
#if defined(HAVE_SECURITY_PAM_APPL_H)
#include <security/pam_appl.h>
#elif defined(HAVE_PAM_PAM_APPL_H)
#include <pam/pam_appl.h>
#endif

#endif

#if defined(HAVE_SECURITY_PAM_MODULES_H)
#include <security/pam_modules.h>
#elif defined(HAVE_PAM_PAM_MODULES_H)
#include <pam/pam_modules.h>
#endif

#if defined(HAVE_SECURITY__PAM_MACROS_H)
#include <security/_pam_macros.h>
#elif defined(HAVE_PAM__PAM_MACROS_H)
#include <pam/_pam_macros.h>
#endif

#ifdef HAVE_SECURITY_PAM_EXT_H
#include <security/pam_ext.h>
#endif

int i; i = PAM_RADIO_TYPE;
''',
            'HAVE_PAM_RADIO_TYPE',
            lib='pam',
            msg="Checking whether PAM_RADIO_TYPE is available");
        if use_pam:
            conf.DEFINE('WITH_PAM', 1)
            conf.DEFINE('WITH_PAM_MODULES', 1)
        else:
            conf.fatal("PAM support is enabled but prerequisite libraries "
                       "or headers not found. Use --without-pam to disable "
                       "PAM support.");

    seteuid = False

#
# Ensure we select the correct set of system calls on Linux.
#
    if (host_os.rfind('linux') > -1):
        conf.CHECK_CODE('''
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <errno.h>

#ifdef HAVE_SYS_PRIV_H
#include <sys/priv.h>
#endif
#ifdef HAVE_SYS_ID_H
#include <sys/id.h>
#endif

#if defined(HAVE_SYSCALL_H)
#include <syscall.h>
#endif

#if defined(HAVE_SYS_SYSCALL_H)
#include <sys/syscall.h>
#endif

syscall(SYS_setresuid32, -1, -1, -1);
syscall(SYS_setresgid32, -1, -1, -1);
syscall(SYS_setreuid32, -1, -1);
syscall(SYS_setregid32, -1, -1);
syscall(SYS_setuid32, -1);
syscall(SYS_setgid32, -1);
syscall(SYS_setgroups32, 0, NULL);
''',
            'USE_LINUX_32BIT_SYSCALLS',
            msg="Checking whether Linux should use 32-bit credential calls");

        if (conf.CONFIG_SET('USE_LINUX_32BIT_SYSCALLS')):
            seteuid = conf.CHECK_CODE('''
                                #define AUTOCONF_TEST 1
                                #define HAVE_LINUX_THREAD_CREDENTIALS 1
                                #define USE_LINUX_32BIT_SYSCALLS 1
                                #include "../lib/util/setid.c"
                                #include "./lib/util_sec.c"
                                ''',
                                'HAVE_LINUX_THREAD_CREDENTIALS',
                                addmain=False,
                                execute=True,
                                msg="Checking whether we can use Linux thread-specific credentials with 32-bit system calls")
        else:
            seteuid = conf.CHECK_CODE('''
                                #define AUTOCONF_TEST 1
                                #define HAVE_LINUX_THREAD_CREDENTIALS 1
                                #include "../lib/util/setid.c"
                                #include "./lib/util_sec.c"
                                ''',
                                'HAVE_LINUX_THREAD_CREDENTIALS',
                                addmain=False,
                                execute=True,
                                msg="Checking whether we can use Linux thread-specific credentials")
    if not seteuid:
        seteuid = conf.CHECK_CODE('''
                                #define AUTOCONF_TEST 1
                                #define USE_SETREUID 1
                                #include "../lib/util/setid.c"
                                #include "./lib/util_sec.c"
                                ''',
                                'USE_SETREUID',
                                addmain=False,
                                execute=True,
                                msg="Checking whether setreuid is available")
    if not seteuid:
        seteuid = conf.CHECK_CODE('''
                                #define AUTOCONF_TEST 1
                                #define USE_SETRESUID 1
                                #include "../lib/util/setid.c"
                                #include "./lib/util_sec.c"
                                ''',
                                'USE_SETRESUID',
                                addmain=False,
                                execute=True,
                                msg="Checking whether setresuid is available")
    if not seteuid:
        seteuid = conf.CHECK_CODE('''
                                #define AUTOCONF_TEST 1
                                #define USE_SETEUID 1
                                #include "../lib/util/setid.c"
                                #include "./lib/util_sec.c"
                                ''',
                                'USE_SETEUID',
                                addmain=False,
                                execute=True,
                                msg="Checking whether seteuid is available")
    if not seteuid:
        seteuid = conf.CHECK_CODE('''
                                #define AUTOCONF_TEST 1
                                #define USE_SETUIDX 1
                                #include "../lib/util/setid.c"
                                #include "./lib/util_sec.c"
                                ''',
                                'USE_SETUIDX',
                                addmain=False,
                                execute=True,
                                mandatory=True,
                                msg="Checking whether setuidx is available")
    if Options.options.with_dnsupdate:
        if not conf.CONFIG_SET('HAVE_KRB5'):
            Logs.warn("--with-dnsupdate=yes but gssapi support not sufficient")
        else:
            conf.DEFINE('WITH_DNS_UPDATES', 1)
    # valgrind.h or valgrind/valgrind.h is checked in lib/replace/wscript
    if Options.options.developer:
        if conf.CONFIG_SET('HAVE_VALGRIND_H') or conf.CONFIG_SET('HAVE_VALGRIND_VALGRIND_H'):
            conf.DEFINE('VALGRIND', '1')

    if conf.CHECK_CODE('''
#include <bits/sockaddr.h>
#include <linux/netlink.h>
''',
                'HAVE_LINUX_NETLINK_H',
                msg="Checking whether Linux netlink is available"):

        conf.CHECK_CODE('''
#include <bits/sockaddr.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
''',
                'HAVE_LINUX_RTNETLINK_H',
                msg='Checking whether Linux rtnetlink is available')

    conf.CHECK_CODE('''
#include "../tests/fcntl_lock.c"
''',
                'HAVE_FCNTL_LOCK',
                addmain=False,
                execute=True,
                msg='Checking whether fcntl locking is available')

    conf.CHECK_CODE('''
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>

#define DATA "ofdtest.fcntl"

int main() {
        struct flock lck = {
           .l_whence = SEEK_SET,
           .l_type = F_WRLCK,
           .l_start = 0,
           .l_len = 1,
           .l_pid = 0,
        };
        int ret;
        int fd1;
        int fd2;
        char *testdir = getenv("TESTDIR");

        if (testdir) {
           if (chdir(testdir) != 0) {
              goto err;
           }
        }

        unlink(DATA);
        fd1 = open(DATA, O_RDWR|O_CREAT|O_EXCL, 0600);
        fd2 = open(DATA, O_RDWR);
        if (fd1 == -1 || fd2 == -1) {
           goto err;
        }
        ret = fcntl(fd1,F_OFD_SETLKW,&lck);
        if (ret == -1) {
          goto err;
        }
        ret = fcntl(fd2,F_OFD_SETLK,&lck);
        if (ret != -1) {
          goto err;
        }
        if (errno != EAGAIN) {
          goto err;
        }
        ret = fcntl(fd2,F_OFD_GETLK,&lck);
        if (ret == -1) {
          goto err;
        }
        unlink(DATA);
        exit(0);
err:
        unlink(DATA);
        exit(1);
}''',
            'HAVE_OFD_LOCKS',
            addmain=False,
            execute=True,
            msg="Checking whether fcntl lock supports open file description locks")

    conf.CHECK_CODE('''
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/socket.h>

int main(void)
{
        int sockfd, ret;
        struct f_owner_ex owner, get_owner;

        sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
        if (sockfd == -1) {
            goto err;
        }

        owner.type = F_OWNER_PID;
        owner.pid = getpid();

        ret = fcntl(sockfd, F_SETOWN_EX, &owner);
        if (ret == -1) {
            goto err;
        }

        ret = fcntl(sockfd, F_GETOWN_EX, &get_owner);
        if (ret == -1) {
            goto err;
        }

        if (get_owner.type != F_OWNER_PID) {
            goto err;
        }

        if (get_owner.pid != getpid()) {
            goto err;
        }

        close(sockfd);
        exit(0);
err:
        close(sockfd);
        exit(1);
}''',
            'HAVE_F_OWNER_EX',
            addmain=False,
            execute=True,
            msg="Checking whether fcntl supports flags to send direct I/O availability signals")

    conf.CHECK_CODE('''
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>

#define DATA "hinttest.fcntl"

int main(void)
{
        uint64_t *hint, get_hint;
        int fd;

        fd = open(DATA, O_RDONLY | O_CREAT | O_EXCL);
        if (fd == -1) {
            goto err;
        }

        *hint = RWH_WRITE_LIFE_SHORT;
        int ret = fcntl(fd, F_SET_RW_HINT, hint);
        if (ret == -1) {
            goto err;
        }

        ret = fcntl(fd, F_GET_RW_HINT, &get_hint);
        if (ret == -1) {
            goto err;
        }

        if (get_hint != RWH_WRITE_LIFE_SHORT) {
            goto err;
        }

        *hint = RWH_WRITE_LIFE_EXTREME;
        ret = fcntl(fd, F_SET_FILE_RW_HINT, hint);
        if (ret == -1) {
            goto err;
        }

        ret = fcntl(fd, F_GET_FILE_RW_HINT, &get_hint);
        if (ret == -1) {
            goto err;
        }

        if (get_hint != RWH_WRITE_LIFE_EXTREME) {
            goto err;
        }

        close(fd);
        unlink(DATA);
        exit(0);
err:
        close(fd);
        unlink(DATA);
        exit(1);
}''',
            'HAVE_RW_HINTS',
            addmain=False,
            execute=True,
            msg="Checking whether fcntl supports setting/geting hints")

    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_mtim.tv_nsec',
                                define='HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC') # Linux, Solaris
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_mtimensec',
                                define='HAVE_STRUCT_STAT_ST_MTIMENSEC') # BSD, if defined _POSIX_SOURCE
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_mtimespec.tv_nsec',
                                define='HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC') # BSD, if not defined _POSIX_SOURCE
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_mtime_n',
                                define='HAVE_STRUCT_STAT_ST_MTIME_N') # AIX
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_umtime',
                                define='HAVE_STRUCT_STAT_ST_UMTIME') # Tru64
    if conf.CONFIG_SET('HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC') or \
       conf.CONFIG_SET('HAVE_STRUCT_STAT_ST_MTIMENSEC') or \
       conf.CONFIG_SET('HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC') or \
       conf.CONFIG_SET('HAVE_STRUCT_STAT_ST_MTIME_N') or \
       conf.CONFIG_SET('HAVE_STRUCT_STAT_ST_UMTIME'):
        conf.DEFINE('HAVE_STAT_HIRES_TIMESTAMPS', '1')

    # recent FreeBSD, NetBSD have creation timestamps called birthtime:
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_birthtime',
                                define='HAVE_STRUCT_STAT_ST_BIRTHTIME')
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_birthtimespec.tv_nsec',
                                define='HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC')
    conf.CHECK_STRUCTURE_MEMBER('struct stat', 'st_birthtimensec',
                                define='HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC')

    conf.CHECK_CODE('''
ssize_t err = posix_fadvise(0,0,0x80000,POSIX_FADV_WILLNEED);
''',
                'HAVE_POSIX_FADVISE',
                msg='Checking whether posix_fadvise is available',
                headers='unistd.h fcntl.h')

    for v in ['_SC_NGROUPS_MAX', '_SC_NPROC_ONLN', '_SC_NPROCESSORS_ONLN', '_SC_PAGESIZE' ]:
        conf.CHECK_CODE('''
                        #include <unistd.h>
                        return sysconf(%s) == -1 ? 1 : 0;
                        ''' % v,
                        'SYSCONF%s' % v,
                        msg='Checking whether sysconf(%s) is available' % v)

    conf.CHECK_CODE('''
#include <sys/syscall.h>
#include <unistd.h>
syscall(SYS_initgroups, 16, NULL, NULL, 0);
                    ''',
                    'HAVE_DARWIN_INITGROUPS',
                    msg='Checking whether to use the Darwin-specific initgroups system call')

    conf.CHECK_CODE('''struct utimbuf tbuf;  tbuf.actime = 0; tbuf.modtime = 1; exit(utime("foo.c",&tbuf));''',
                    'HAVE_UTIMBUF',
                    headers='sys/types.h utime.h',
                    msg='Checking whether struct utimbuf is available')

    if conf.CHECK_CODE('''struct sigevent s;''',
                    'HAVE_STRUCT_SIGEVENT',
                    headers='sys/types.h stdlib.h stddef.h signal.h',
                    msg='Checking whether we have the struct sigevent'):
        conf.CHECK_STRUCTURE_MEMBER('struct sigevent', 'sigev_value.sival_ptr',
                                    define='HAVE_STRUCT_SIGEVENT_SIGEV_VALUE_SIVAL_PTR',
                                    headers='signal.h');
        conf.CHECK_STRUCTURE_MEMBER('struct sigevent', 'sigev_value.sigval_ptr',
                                    define='HAVE_STRUCT_SIGEVENT_SIGEV_VALUE_SIGVAL_PTR',
                                    headers='signal.h');

    if os.path.exists('/proc/sys/kernel/core_pattern'):
        conf.DEFINE('HAVE_SYS_KERNEL_PROC_CORE_PATTERN', '1')

    if conf.CHECK_CODE('''
#include <time.h>
main() {
        struct tm *tm;
        if (sizeof(time_t) == 8) {
                time_t max_time = 0x7fffffffffffffffll;
                tm = gmtime(&max_time);
                /* This should fail with 32-bit tm_year. */
                if (tm == NULL) {
                        /* Max time_t that works with 32-bit int tm_year in struct tm. */
                        max_time = 67768036191676799ll;
                        tm = gmtime(&max_time);
                        if (tm) {
                                exit(0);
                        }
                }
        }
        exit(1);
}''',
        '__TIME_T_MAX',
        addmain=False,
        execute=True,
        msg="Checking for the maximum value of the 'time_t' type"):
            conf.DEFINE('TIME_T_MAX', '67768036191676799ll')

    conf.CHECK_CODE('''
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <sys/types.h>
#if defined(HAVE_SYS_SYSMACROS_H)
#include <sys/sysmacros.h>
#endif
main() { dev_t dev = makedev(1,2); return 0; }
''',
        'HAVE_MAKEDEV',
        addmain=False,
        msg='Checking whether the macro for makedev is available')

    conf.CHECK_CODE('''
#include <stdio.h>
#include <limits.h>
#include <signal.h>

void exit_on_core(int ignored) {
        exit(1);
}

main() {
        char *newpath;
        signal(SIGSEGV, exit_on_core);
        newpath = realpath("/tmp", NULL);
        exit((newpath != NULL) ? 0 : 1);
}
''',
        'REALPATH_TAKES_NULL',
        addmain=False,
        execute=True,
        msg='Checking whether the realpath function allows a NULL argument')

    conf.CHECK_CODE('''#include "../tests/ftruncate.c"''',
                    'HAVE_FTRUNCATE_EXTEND',
                    msg='Checking for ftruncate extend',
                    addmain=False,
                    execute=True)

    conf.SET_TARGET_TYPE('sendfile', 'EMPTY')
    conf.CHECK_LIB('sendfile')
    if not Options.options.with_sendfile_support == False:
        if (host_os.rfind('linux') > -1) or (host_os.rfind('gnu') > -1) or (host_os.rfind('k*bsd*-gnu') > -1) or (host_os.rfind('kopensolaris*-gnu') > -1):
            conf.CHECK_CODE('''
                            int tofd, fromfd;
                            off_t offset;
                            size_t total;
                            ssize_t nwritten = sendfile(tofd, fromfd, &offset, total);
                            ''',
                            '_HAVE_SENDFILE',
                            headers='sys/sendfile.h',
                            msg='Checking for linux sendfile support')

            if conf.CONFIG_SET('_HAVE_SENDFILE'):
                conf.DEFINE('HAVE_SENDFILE', '1')
                conf.DEFINE('LINUX_SENDFILE_API', '1')
        elif (host_os.rfind('freebsd') > -1) or (host_os.rfind('dragonfly') > -1):
            conf.CHECK_CODE('''
                            #include <sys/types.h>
                            #include <unistd.h>
                            #include <sys/socket.h>
                            #include <sys/uio.h>
                            int fromfd, tofd, ret, total=0;
                            off_t offset, nwritten;
                            struct sf_hdtr hdr;
                            struct iovec hdtrl;
                            hdr.headers = &hdtrl;
                            hdr.hdr_cnt = 1;
                            hdr.trailers = NULL;
                            hdr.trl_cnt = 0;
                            hdtrl.iov_base = NULL;
                            hdtrl.iov_len = 0;
                            ret = sendfile(fromfd, tofd, offset, total, &hdr, &nwritten, 0)
                            ''',
                            '_HAVE_SENDFILE',
                            msg='Checking for freebsd sendfile support')
            if conf.CONFIG_SET('_HAVE_SENDFILE'):
                conf.DEFINE('HAVE_SENDFILE', '1')
                conf.DEFINE('FREEBSD_SENDFILE_API', '1')
        elif (host_os.rfind('darwin') > -1):
            conf.CHECK_CODE('''
                            #include <sys/types.h>
                            #include <sys/socket.h>
                            #include <sys/uio.h>
                            int fromfd, tofd, ret;
                            off_t offset, nwritten;
                            struct sf_hdtr hdr;
                            struct iovec hdtrl;
                            hdr.headers = &hdtrl;
                            hdr.hdr_cnt = 1;
                            hdr.trailers = (void *)0;
                            hdr.trl_cnt = 0;
                            hdtrl.iov_base = (void *)0;
                            hdtrl.iov_len = 0;
                            ret = sendfile(fromfd, tofd, offset, &nwritten, &hdr, 0);
                            ''',
                            '_HAVE_SENDFILE',
                            msg='Checking for darwin sendfile support')
            if conf.CONFIG_SET('_HAVE_SENDFILE'):
                conf.DEFINE('HAVE_SENDFILE', '1')
                conf.DEFINE('DARWIN_SENDFILE_API', '1')
        elif (host_os.rfind('hpux') > -1) or (host_os.rfind('osf') > -1):
            conf.CHECK_CODE('''
                            #include <sys/socket.h>
                            #include <sys/uio.h>
                            int fromfd, tofd;
                            size_t total=0;
                            struct iovec hdtrl[2];
                            ssize_t nwritten;
                            off_t offset;
                            hdtrl[0].iov_base = 0;
                            hdtrl[0].iov_len = 0;
                            nwritten = sendfile(tofd, fromfd, offset, total, &hdtrl[0], 0);
                            ''',
                            '_HAVE_SENDFILE',
                            msg='Checking for osf/hpux sendfile support')
            if conf.CONFIG_SET('_HAVE_SENDFILE'):
                conf.DEFINE('HAVE_SENDFILE', '1')
                conf.DEFINE('HPUX_SENDFILE_API', '1')
        elif (host_os.rfind('sunos') > -1):
            conf.CHECK_FUNCS_IN('sendfilev', 'sendfile')
            conf.CHECK_CODE('''
                            #include <sys/sendfile.h>,
                            int sfvcnt;
                            size_t xferred;
                            struct sendfilevec vec[2];
                            ssize_t nwritten;
                            int tofd;
                            sfvcnt = 2;
                            vec[0].sfv_fd = SFV_FD_SELF;
                            vec[0].sfv_flag = 0;
                            vec[0].sfv_off = 0;
                            vec[0].sfv_len = 0;
                            vec[1].sfv_fd = 0;
                            vec[1].sfv_flag = 0;
                            vec[1].sfv_off = 0;
                            vec[1].sfv_len = 0;
                            nwritten = sendfilev(tofd, vec, sfvcnt, &xferred);
                            ''',
                            '_HAVE_SENDFILEV',
                            msg='Checking for solaris sendfilev support',
                            lib='sendfile')
            if conf.CONFIG_SET('_HAVE_SENDFILEV'):
                conf.DEFINE('HAVE_SENDFILEV', '1')
                conf.DEFINE('SOLARIS_SENDFILE_API', '1')
        elif (host_os.rfind('aix') > -1):
            conf.CHECK_CODE('''
                            #include <sys/socket.h>
                            int fromfd, tofd;
                            size_t total=0;
                            struct sf_parms hdtrl;
                            ssize_t nwritten;
                            hdtrl.header_data = 0;
                            hdtrl.header_length = 0;
                            hdtrl.file_descriptor = fromfd;
                            hdtrl.file_offset = 0;
                            hdtrl.file_bytes = 0;
                            hdtrl.trailer_data = 0;
                            hdtrl.trailer_length = 0;
                            nwritten = send_file(&tofd, &hdtrl, 0);
                            ''',
                            '_HAVE_SENDFILE',
                            msg='Checking for AIX send_file support')
            if conf.CONFIG_SET('_HAVE_SENDFILE'):
                conf.DEFINE('HAVE_SENDFILE', '1')
                conf.DEFINE('AIX_SENDFILE_API', '1')

    if Options.options.with_sendfile_support == True and not conf.CONFIG_SET('HAVE_SENDFILE'):
        conf.fatal('sendfile support not found but it was requested !')
    # Check for getcwd allowing a NULL arg.
    conf.CHECK_CODE('''
#include <unistd.h>
main() {
        char *s = getcwd(NULL,0);
        exit(s != NULL ?  0 : 1);
}''', 'GETCWD_TAKES_NULL', addmain=False, execute=True,
        msg="getcwd takes a NULL argument")


    # UnixWare 7.x has its getspnam in -lgen
    conf.CHECK_FUNCS_IN('getspnam', 'gen')
    conf.CHECK_FUNCS_IN('getspnam', 'security')
    conf.CHECK_FUNCS_IN('getspnam', 'sec')

    legacy_quota_libs = ''
    if not Options.options.with_quotas == False:
        # For quotas on Veritas VxFS filesystems
        conf.CHECK_HEADERS('sys/fs/vx_quota.h')
        # For sys/quota.h and linux/quota.h
        conf.CHECK_HEADERS('sys/quota.h')
        # For quotas on BSD systems
        conf.CHECK_HEADERS('ufs/ufs/quota.h')
        # For quotas on AIX systems
        conf.CHECK_HEADERS('jfs/quota.h')
        # For quotas on Linux XFS filesystems
        if conf.CHECK_HEADERS('xfs/xqm.h'):
            conf.DEFINE('HAVE_XFS_QUOTAS', '1')
        else:
            # For Irix XFS
            conf.CHECK_CODE('''
                #include "confdefs.h"
                #ifdef HAVE_SYS_TYPES_H
                #include <sys/types.h>
                #endif
                #ifdef HAVE_ASM_TYPES_H
                #include <asm/types.h>
                #endif
                #include <sys/quota.h>
                int i = Q_XGETQUOTA;''',
                define='HAVE_XFS_QUOTAS',
                msg='for XFS QUOTA in <sys/quota.h>',
                execute=False,
                local_include=False)

        # For IRIX like dqb_isoftlimit instead of dqb_fsoftlimit in struc dqblk
        conf.CHECK_STRUCTURE_MEMBER('struct dqblk', 'dqb_fsoftlimit', define='HAVE_DQB_FSOFTLIMIT',
                                headers='sys/quota.h')
        #darwin style quota bytecount
        conf.CHECK_STRUCTURE_MEMBER('struct dqblk', 'dqb_curbytes', define='HAVE_STRUCT_DQBLK_DQB_CURBYTES',
                                headers='sys/quota.h')
        conf.CHECK_HEADERS('rpc/types.h rpc/xdr.h', together=True)
        if conf.CHECK_HEADERS('rpcsvc/rquota.h', lib='tirpc'):
            # Optional structure member
            conf.CHECK_STRUCTURE_MEMBER('struct getquota_rslt', 'getquota_rslt_u',
                                        define='HAVE_GETQUOTA_RSLT_GETQUOTA_RSLT_U',
                                        headers='rpcsvc/rquota.h',
                                        lib='tirpc')

            # Required function for NFS quota support
            conf.CHECK_CODE('''
                            clnt_create("", RQUOTAPROG, RQUOTAVERS, "udp");
                            ''',
                            headers="rpc/rpc.h rpc/types.h rpcsvc/rquota.h rpc/nettype.h rpc/xdr.h",
                            define='HAVE_NFS_QUOTAS',
                            msg='checking for clnt_create()',
                            execute=True,
                            local_include=False,
                            lib='tirpc')

        if (host_os.rfind('linux') > -1):
            conf.DEFINE('HAVE_QUOTACTL_LINUX', '1')
        elif not conf.CONFIG_SET("HAVE_XFS_QUOTAS"):
            if not conf.CHECK_CODE('''
                #define HAVE_QUOTACTL_4A 1
                #define AUTOCONF_TEST 1
                #include "../tests/sysquotas.c"
                ''',
                                   cflags=conf.env['WERROR_CFLAGS'],
                                   define='HAVE_QUOTACTL_4A',
                                   msg='for QUOTACTL_4A: long quotactl(int cmd, char *special, qid_t id, caddr_t addr)',
                                   execute=True,
                                   addmain=False):

                conf.CHECK_CODE('''
                #define HAVE_QUOTACTL_4B 1
                #define AUTOCONF_TEST 1
                #include "../tests/sysquotas.c"
                ''',
                                cflags=conf.env['WERROR_CFLAGS'],
                                define='HAVE_QUOTACTL_4B',
                                msg='for QUOTACTL_4B:  int quotactl(const char *path, int cmd, int id, char *addr)',
                                execute=True,
                                addmain=False)

        if conf.CONFIG_SET('HAVE_QUOTACTL_LINUX') or \
           conf.CONFIG_SET('HAVE_QUOTACTL_4A') or \
           conf.CONFIG_SET('HAVE_QUOTACTL_4B') or \
           conf.CONFIG_SET('HAVE_XFS_QUOTAS'):
            conf.DEFINE('HAVE_SYS_QUOTAS', '1')
            conf.DEFINE('WITH_QUOTAS', '1')

        #
        # check if Legacy quota code can be brought in
        # if standard interfaces are not supported
        #
        if not conf.CONFIG_SET('WITH_QUOTAS'):
            if host_os.rfind('sunos5') > -1:
                conf.DEFINE('SUNOS5', '1')
                legacy_quota_libs = 'nsl'
            conf.CHECK_CODE('''
            #define WITH_QUOTAS 1
            #define AUTOCONF_TEST 1
            #include "../tests/oldquotas.c"
            ''',
                            cflags=conf.env['WERROR_CFLAGS'],
                            define='WITH_QUOTAS',
                            lib=legacy_quota_libs,
                            msg='Checking whether legacy quota code can be used',
                            execute=False,
                            addmain=False)
            if not conf.CONFIG_SET('WITH_QUOTAS'):
                legacy_quota_libs = ''
    conf.env['legacy_quota_libs'] = legacy_quota_libs

    if Options.options.with_quotas == True and not conf.CONFIG_SET('WITH_QUOTAS'):
        conf.fatal('quota support not found but it was equested !')

    conf.CHECK_CODE('(void)unshare(CLONE_FS);',
                    headers='sched.h',
                    define='HAVE_UNSHARE_CLONE_FS',
                    msg='for Linux unshare(CLONE_FS)')

    # Check for mallinfo
    conf.CHECK_CODE('''
    struct mallinfo mi;
    int tmp;

    mi = mallinfo();
    tmp = mi.arena + mi.ordblks + mi.smblks + mi.hblks +
          mi.hblkhd + mi.usmblks + mi.fsmblks +  mi.uordblks +
          mi.fordblks + mi.keepcost;
    return tmp;
    ''', 'HAVE_MALLINFO', msg="Checking for mallinfo()", headers='malloc.h')

    #
    # cluster support (CTDB)
    #
    if not Options.options.with_cluster_support:
        Logs.info("building without cluster support (--without-cluster-support)")
        conf.env.with_ctdb = False
    else:
        Logs.info("building with cluster support")
        conf.env.with_ctdb = True
        conf.DEFINE('CLUSTER_SUPPORT', 1)

    conf.CHECK_CODE('void seekdir(DIR *d, long loc) { return; }',
                    'SEEKDIR_RETURNS_VOID',
                    headers='sys/types.h dirent.h',
                    msg='Checking whether seekdir returns void')

    if Options.options.with_profiling_data:
        conf.DEFINE('WITH_PROFILE', 1);
        conf.CHECK_FUNCS('getrusage', headers="sys/time.h sys/resource.h")

    if (conf.CHECK_HEADERS('linux/ioctl.h sys/ioctl.h linux/fs.h') and
        conf.CHECK_DECLS('FS_IOC_GETFLAGS FS_COMPR_FL', headers='linux/fs.h')):
            conf.DEFINE('HAVE_LINUX_IOCTL', '1')

    conf.env['CFLAGS_CEPHFS'] = "-D_FILE_OFFSET_BITS=64"
    if Options.options.libcephfs_dir:
        Logs.error('''--with-libcephfs no longer supported, please use compiler
                   flags instead, e.g. GCC LIBRARY_PATH and C_INCLUDE_PATH''')
        sys.exit(1)

    if (Options.options.with_cephfs and
        conf.CHECK_HEADERS('cephfs/libcephfs.h', False, False, 'cephfs') and
        conf.CHECK_LIB('cephfs', shlib=True)):
        if (Options.options.with_acl_support and
            conf.CHECK_FUNCS_IN('ceph_statx', 'cephfs',
                                headers='cephfs/libcephfs.h')):
            conf.DEFINE('HAVE_CEPH', '1')
        else:
            Logs.warn('''Ceph support disabled due to --without-acl-support
                      or lack of ceph_statx support''')
            conf.undefine('HAVE_CEPH')

    if Options.options.with_glusterfs:
        conf.CHECK_CFG(package='glusterfs-api', args='"glusterfs-api >= 4" --cflags --libs',
                       msg='Checking for glusterfs-api >= 4', uselib_store="GFAPI")
        conf.CHECK_HEADERS('glusterfs/api/glfs.h', lib='gfapi')
        conf.CHECK_LIB('gfapi', shlib=True)

        if conf.CONFIG_SET('HAVE_GLUSTERFS_API_GLFS_H'):
            if Options.options.with_acl_support:
                 conf.DEFINE('HAVE_GLUSTERFS', '1')
            else:
                Logs.warn("GlusterFS support disabled due to --without-acl-support")
                conf.undefine('HAVE_GLUSTERFS')
        else:
            conf.undefine('HAVE_GLUSTERFS')

        conf.CHECK_CFG(package='glusterfs-api', args='"glusterfs-api >= 6" --cflags --libs',
                       msg='Checking for glusterfs-api >= 6',
                       uselib_store="GFAPI_VER_6")
        conf.CHECK_CFG(package='glusterfs-api', args='"glusterfs-api >= 7.6" --cflags --libs',
                       msg='Checking for glusterfs-api >= 7.6',
                       uselib_store="GFAPI_VER_7_6")
    else:
        conf.SET_TARGET_TYPE('gfapi', 'EMPTY')
        conf.undefine('HAVE_GLUSTERFS')

    if Options.options.enable_vxfs:
        conf.DEFINE('HAVE_VXFS', '1')

    if conf.CHECK_CFG(package='dbus-1', args='--cflags --libs',
                      msg='Checking for dbus', uselib_store="DBUS-1"):
        if (conf.CHECK_HEADERS('dbus/dbus.h', lib='dbus-1')
                                      and conf.CHECK_LIB('dbus-1', shlib=True)):
            conf.DEFINE('HAVE_DBUS', '1')

    if conf.CHECK_CFG(package='liburing', args='--cflags --libs',
                      msg='Checking for liburing package', uselib_store="URING"):
        if (conf.CHECK_HEADERS('liburing.h', lib='uring')
                                      and conf.CHECK_LIB('uring', shlib=True)):
            conf.CHECK_FUNCS_IN('io_uring_ring_dontfork', 'uring',
                                headers='liburing.h')
            conf.DEFINE('HAVE_LIBURING', '1')

    conf.env.build_regedit = False
    if not Options.options.with_regedit == False:
        conf.PROCESS_SEPARATE_RULE('system_ncurses')
        if conf.CONFIG_SET('HAVE_NCURSES'):
            conf.env.build_regedit = True

    if conf.env.build_regedit:
        Logs.info("building regedit")
    else:
        if Options.options.with_regedit == False:
            Logs.info("not building regedit (--without-regedit)")
        elif Options.options.with_regedit == True:
            Logs.error("ncurses not available, cannot build regedit")
            conf.fatal("ncurses not available, but --with-regedit was specified")
        else:
            Logs.info("ncurses not available, not building regedit")

    if conf.CHECK_HEADERS('ftw.h') and conf.CHECK_FUNCS('nftw'):
        conf.env.build_mvxattr = True

    conf.CHECK_FUNCS_IN('DES_pcbc_encrypt', 'crypto')
    if Options.options.with_fake_kaserver == True:
        conf.CHECK_HEADERS('afs/param.h afs/stds.h', together=True)
        conf.CHECK_HEADERS('afs/param.h afs/stds.h', together=True)
        if (conf.CONFIG_SET('HAVE_AFS_PARAM_H') and conf.CONFIG_SET('HAVE_AFS_STDS_H') and conf.CONFIG_SET('HAVE_DES_PCBC_ENCRYPT')):
            conf.DEFINE('WITH_FAKE_KASERVER', '1')
        else:
            conf.fatal('AFS headers not available, but --with-fake-kaserver was specified')

    if conf.CHECK_CFG(package='glib-2.0',
                      args='--cflags --libs',
                      msg='Checking for glib-2.0',
                      uselib_store="GLIB-2.0"):
        if (conf.CHECK_HEADERS('glib.h', lib='glib-2.0') and conf.CHECK_LIB('glib-2.0', shlib=True)):
            conf.DEFINE('HAVE_GLIB', 1)

    if conf.CONFIG_SET('HAVE_GLIB'):
        conf.DEFINE('WITH_TEVENT_GLIB_GLUE', '1')

    conf.env['libtracker']=''
    tracker_versions = ['2.0', '1.0', '0.16', '0.14']

    for version in tracker_versions:
        testlib = 'tracker-sparql-' + version
        if conf.CHECK_CFG(package=testlib,
                          args='--cflags --libs',
                          mandatory=False):
            conf.SET_TARGET_TYPE(testlib, 'SYSLIB')
            conf.env['libtracker'] = testlib
            conf.DEFINE('HAVE_TRACKER', '1')
            break

    Logs.info("Checking for bison")
    bison.configure(conf)
    if conf.env['BISON']:
        conf.CHECK_COMMAND('%s --version  | head -n1' % conf.env.BISON[0],
                           msg='Using bison version',
                           define=None,
                           on_target=False)

    Logs.info("Checking for flex")
    conf.find_program('flex', var='FLEX')
    if conf.env['FLEX']:
        conf.env.FLEXFLAGS = ['-t']
        conf.CHECK_COMMAND('%s --version' % conf.env.FLEX[0],
                           msg='Using flex version',
                           define=None,
                           on_target=False)

    with_spotlight_tracker_backend = (
        conf.CONFIG_SET('HAVE_TRACKER')
        and conf.CONFIG_SET('HAVE_GLIB')
        and conf.env['BISON']
        and conf.env['FLEX']
        and conf.CONFIG_GET('HAVE_UTF8_NORMALISATION')
    )

    with_spotlight_es_backend = (
        conf.CONFIG_SET('HAVE_JSON_OBJECT')
        and conf.env['BISON']
        and conf.env['FLEX']
        and conf.CONFIG_GET('HAVE_UTF8_NORMALISATION')
    )

    conf.env.with_spotlight = False
    if Options.options.with_spotlight is not False:
        backends = ['noindex']

        if not conf.env['BISON']:
            Logs.warn("Spotlight support requested but bison missing")
        if not conf.env['FLEX']:
            Logs.warn("Spotlight support requested but flex missing")
        if not conf.CONFIG_GET('HAVE_UTF8_NORMALISATION'):
            Logs.warn("Missing support for Unicode normalisation. "
                      "Try installing icu-dev or libicu-devel.")
        if not conf.CONFIG_SET('HAVE_TRACKER'):
            Logs.warn('Missing libtracker-sparql development files for Spotlight backend "tracker"')
        if not conf.CONFIG_SET('HAVE_GLIB'):
            Logs.warn('Missing glib-2.0 development files for Spotlight backend "tracker"')
        if not conf.CONFIG_GET('HAVE_JSON_OBJECT'):
            Logs.warn('Missing libjansson development files for Spotlight backend "elasticsearch"')

        if with_spotlight_tracker_backend:
            conf.env.spotlight_backend_tracker = True
            backends.append('tracker')
            conf.DEFINE('HAVE_SPOTLIGHT_BACKEND_TRACKER', '1')

        if with_spotlight_es_backend:
            conf.env.spotlight_backend_es = True
            backends.append('elasticsearch')
            conf.DEFINE('HAVE_SPOTLIGHT_BACKEND_ES', '1')

        if (Options.options.with_spotlight is True
            and not conf.env.spotlight_backend_tracker
            and not conf.env.spotlight_backend_es):
            conf.fatal("Unmet dependencies for Spotlight backends")

        Logs.info("Building with Spotlight support, available backends: %s" % ', '.join(backends))
        default_static_modules.extend(TO_LIST('rpc_mdssvc_module'))
        conf.DEFINE('WITH_SPOTLIGHT', '1')
        conf.env.with_spotlight = True

    if not conf.CONFIG_SET('HAVE_RPC_XDR_H'):
        conf.CHECK_HEADERS('rpc/xdr.h', lib='tirpc')

    if conf.CHECK_FUNCS_IN('nscd_flush_cache', 'nscd', headers='libnscd.h'):
        conf.DEFINE('HAVE_NSCD_FLUSH_CACHE', '1')

    forced_static_modules.extend(TO_LIST('auth_builtin auth_sam auth_winbind'))
    default_static_modules.extend(TO_LIST('''pdb_smbpasswd pdb_tdbsam
                                      auth_unix
                                      nss_info_template idmap_tdb idmap_passdb
                                      idmap_nss'''))

    default_shared_modules.extend(TO_LIST('''
                                      vfs_recycle vfs_audit vfs_extd_audit vfs_full_audit
                                      vfs_fake_perms vfs_default_quota vfs_readonly vfs_cap
                                      vfs_expand_msdfs vfs_shadow_copy vfs_shadow_copy2
                                      vfs_readahead vfs_xattr_tdb
                                      vfs_streams_xattr vfs_streams_depot vfs_acl_xattr vfs_acl_tdb
                                      vfs_preopen vfs_catia
                                      vfs_media_harmony vfs_unityed_media vfs_fruit vfs_shell_snap
                                      vfs_commit vfs_worm vfs_crossrename vfs_linux_xfs_sgid
                                      vfs_time_audit vfs_offline vfs_virusfilter
                                  '''))
    default_shared_modules.extend(TO_LIST('idmap_tdb2 idmap_script'))
    # these have broken dependencies
    forced_shared_modules.extend(TO_LIST('idmap_autorid idmap_rid idmap_hash'))

    if Options.options.developer:
        default_static_modules.extend(TO_LIST('charset_weird'))
        default_shared_modules.extend(TO_LIST('perfcount_test'))
        default_shared_modules.extend(TO_LIST('vfs_skel_opaque vfs_skel_transparent vfs_shadow_copy_test'))
        default_shared_modules.extend(TO_LIST('auth_skel pdb_test'))
        default_shared_modules.extend(TO_LIST('vfs_fake_dfq'))
        default_shared_modules.extend(TO_LIST('gpext_security gpext_registry gpext_scripts'))

    if Options.options.enable_selftest or Options.options.developer:
        default_shared_modules.extend(TO_LIST('vfs_fake_acls vfs_nfs4acl_xattr'))
        default_shared_modules.extend(TO_LIST('vfs_error_inject'))
        default_shared_modules.extend(TO_LIST('vfs_delay_inject'))

    if conf.CONFIG_SET('AD_DC_BUILD_IS_ENABLED'):
        default_static_modules.extend(TO_LIST('pdb_samba_dsdb auth_samba4 vfs_dfs_samba4'))
        default_shared_modules.extend(TO_LIST('vfs_posix_eadb'))

    if conf.CONFIG_SET('HAVE_FREEBSD_SUNACL_H'):
        default_shared_modules.extend(TO_LIST('vfs_zfsacl'))

    if conf.CONFIG_SET('HAVE_DIRFD_DECL'):
        default_shared_modules.extend(TO_LIST('vfs_syncops vfs_dirsort'))

    if conf.CONFIG_SET('HAVE_STATFS_F_FSID'):
        default_shared_modules.extend(TO_LIST('vfs_fileid'))

    if (conf.CONFIG_SET('HAVE_STRUCT_MSGHDR_MSG_CONTROL') or conf.CONFIG_SET('HAVE_STRUCT_MSGHDR_MSG_ACCRIGHTS')):
        default_shared_modules.extend(TO_LIST('vfs_aio_fork'))

    if conf.CONFIG_SET('HAVE_LIBURING'):
        default_shared_modules.extend(TO_LIST('vfs_io_uring'))

    if Options.options.with_pthreadpool:
        default_shared_modules.extend(TO_LIST('vfs_aio_pthread'))

    if conf.CONFIG_SET('HAVE_LDAP'):
        default_static_modules.extend(TO_LIST('pdb_ldapsam idmap_ldap'))

    if conf.CONFIG_SET('DARWINOS'):
        default_static_modules.extend(TO_LIST('charset_macosxfs'))

    if conf.CONFIG_SET('HAVE_GPFS'):
        default_shared_modules.extend(TO_LIST('vfs_gpfs'))

    if (conf.CONFIG_SET('HAVE_LINUX_IOCTL')
      and conf.CONFIG_SET('HAVE_BASENAME') and conf.CONFIG_SET('HAVE_DIRNAME')):
        default_shared_modules.extend(TO_LIST('vfs_btrfs'))

    if conf.CONFIG_SET("HAVE_CEPH"):
        default_shared_modules.extend(TO_LIST('vfs_ceph'))
        # Unlike vfs_ceph, vfs_ceph_snapshots doesn't depend on libcephfs, so
        # can be enabled atop a kernel CephFS share (with vfs_default) in
        # addition to vfs_ceph. Still, only enable vfs_ceph_snapshots builds
        # if we're building with libcephfs for now.
        default_shared_modules.extend(TO_LIST('vfs_ceph_snapshots'))

    if conf.CONFIG_SET('HAVE_GLUSTERFS'):
        default_shared_modules.extend(TO_LIST('vfs_glusterfs'))

    if conf.CONFIG_SET('HAVE_SETMNTENT'):
        default_shared_modules.extend(TO_LIST('vfs_glusterfs_fuse'))

    if conf.CONFIG_SET('HAVE_VXFS'):
        default_shared_modules.extend(TO_LIST('vfs_vxfs'))

    if conf.CONFIG_SET('HAVE_DBUS'):
        default_shared_modules.extend(TO_LIST('vfs_snapper'))

    explicit_shared_modules = TO_LIST(Options.options.shared_modules, delimiter=',')
    explicit_static_modules = TO_LIST(Options.options.static_modules, delimiter=',')

    def replace_list_item(lst, item, value):
        try:
            idx = lst.index(item)
            lst[idx] = value
        except:
            pass
    # PDB module file name should have the same name as module registers itself
    # In Autoconf build we export LDAP passdb module as ldapsam but WAF build
    # was always exporting pdb_ldap. In order to support existing packages
    # allow referring to pdb_ldapsam as pdb_ldap but use proper name internally.
    replace_list_item(explicit_shared_modules, 'pdb_ldap', 'pdb_ldapsam')
    replace_list_item(explicit_static_modules, 'pdb_ldap', 'pdb_ldapsam')

    final_static_modules = []
    final_static_modules.extend(TO_LIST(required_static_modules))
    final_shared_modules = []

    if '!FORCED' not in explicit_static_modules:
        final_static_modules.extend(TO_LIST(forced_static_modules))
    if '!FORCED' not in explicit_shared_modules:
        final_shared_modules.extend(TO_LIST(forced_shared_modules))
    if '!DEFAULT' not in explicit_static_modules:
        final_static_modules.extend(TO_LIST(default_static_modules))
    if '!DEFAULT' not in explicit_shared_modules:
        final_shared_modules.extend(TO_LIST(default_shared_modules))

    if 'ALL' in explicit_static_modules:
        for m in default_shared_modules:
            if m in final_shared_modules:
                final_shared_modules.remove(m)
            final_static_modules.append(m)
    if 'ALL' in explicit_shared_modules:
        for m in default_static_modules:
            if m in final_static_modules:
                final_static_modules.remove(m)
            final_shared_modules.append(m)

    for m in explicit_static_modules:
        if m in ['ALL','!DEFAULT','!FORCED']:
            continue
        if m.startswith('!'):
            m = m[1:]
            if m in required_static_modules:
                raise Errors.WafError('These modules are REQUIRED as static modules: %s' %
                                     ' '.join(required_static_modules))
            if m in final_static_modules:
                final_static_modules.remove(m)
            continue
        if m in forced_shared_modules:
            raise Errors.WafError('These modules MUST be configured as shared modules: %s' %
                                 ' '.join(forced_shared_modules))
        if m in final_shared_modules:
            final_shared_modules.remove(m)
        if m not in final_static_modules:
            final_static_modules.append(m)
    for m in explicit_shared_modules:
        if m in ['ALL','!DEFAULT','!FORCED']:
            continue
        if m.startswith('!'):
            m = m[1:]
            if m in final_shared_modules:
                final_shared_modules.remove(m)
            continue
        if m in required_static_modules:
            raise Errors.WafError('These modules are REQUIRED as static modules: %s' %
                                 ' '.join(required_static_modules))
        if m in forced_static_modules:
            raise Errors.WafError('These module MUST be configured as static modules: %s' %
                                 ' '.join(forced_static_modules))
        if m in final_static_modules:
            final_static_modules.remove(m)
        if m not in final_shared_modules:
            final_shared_modules.append(m)

    conf.env['static_modules'] = final_static_modules
    conf.env['shared_modules'] = final_shared_modules

    conf.DEFINE('STRING_STATIC_MODULES', ' '.join(final_static_modules), quote=True)

    static_list = {}
    shared_list = {}

    prefixes = ['vfs', 'pdb', 'auth', 'nss_info', 'charset', 'idmap', 'gpext', 'perfcount', 'rpc']
    conf.env['MODULE_PREFIXES'] = prefixes
    for p in prefixes:
        for m in final_static_modules:
            if m.find(p) == 0:
                if not p in static_list:
                    static_list[p] = []
                static_list[p].append(m)
        for m in final_shared_modules:
            if m.find(p) == 0:
                if not p in shared_list:
                    shared_list[p] = []
                shared_list[p].append(m)

    for p in prefixes:
        static_env = "%s_STATIC" % p.upper()
        shared_env = "%s_SHARED" % p.upper()
        conf.env[static_env] = []
        conf.env[shared_env] = []
        if p in static_list:
            decl_list = " ".join("extern NTSTATUS %s_init(TALLOC_CTX *mem_ctx); " % entry for entry in static_list[p])
            for entry in static_list[p]:
                conf.env[static_env].append('%s' % entry)
            conf.DEFINE('static_decl_%s' % p, decl_list)
            conf.DEFINE('static_init_%s(mem_ctx)' % p, '{ %s_init((mem_ctx)); }' % '_init((mem_ctx));  '.join(static_list[p]))
        else:
            conf.DEFINE('static_decl_%s' % p, '')
            conf.DEFINE('static_init_%s(mem_ctx)' % p, '{}')
        if p in shared_list:
            for entry in shared_list[p]:
                conf.DEFINE('%s_init' % entry, 'samba_init_module')
                conf.env[shared_env].append('%s' % entry)
        Logs.info("%s: %s" % (static_env, ','.join(conf.env[static_env])))
        Logs.info("%s: %s" % (shared_env, ','.join(conf.env[shared_env])))

    conf.SAMBA_CONFIG_H('include/config.h')