Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 754 insertions, 0 deletions

diff --git a/buildtools/wafsamba/samba_utils.py b/buildtools/wafsamba/samba_utils.py
new file mode 100644
index 0000000..f287e85
--- /dev/null
+++ b/buildtools/wafsamba/samba_utils.py
@@ -0,0 +1,754 @@
+# a waf tool to add autoconf-like macros to the configure section
+# and for SAMBA_ macros for building libraries, binaries etc
+
+import errno
+import os, sys, re, fnmatch, shlex, inspect
+from optparse import SUPPRESS_HELP
+from waflib import Build, Options, Utils, Task, Logs, Configure, Errors, Context
+from waflib import Scripting
+from waflib.TaskGen import feature, before, after
+from waflib.Configure import ConfigurationContext
+from waflib.Logs import debug
+from waflib import ConfigSet
+from waflib.Build import CACHE_SUFFIX
+
+# TODO: make this a --option
+LIB_PATH="shared"
+
+
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+
+    # helper function to get a string from a variable that maybe 'str' or
+    # 'bytes' if 'bytes' then it is decoded using 'utf8'. If 'str' is passed
+    # it is returned unchanged
+    # Using this function is PY2/PY3 code should ensure in most cases
+    # the PY2 code runs unchanged in PY2 whereas the code in PY3 possibly
+    # decodes the variable (see PY2 implementation of this function below)
+    def get_string(bytesorstring):
+        tmp = bytesorstring
+        if isinstance(bytesorstring, bytes):
+            tmp = bytesorstring.decode('utf8')
+        elif not isinstance(bytesorstring, str):
+            raise ValueError('Expected byte of string for %s:%s' % (type(bytesorstring), bytesorstring))
+        return tmp
+
+else:
+
+    # Helper function to return string.
+    # if 'str' or 'unicode' passed in they are returned unchanged
+    # otherwise an exception is generated
+    # Using this function is PY2/PY3 code should ensure in most cases
+    # the PY2 code runs unchanged in PY2 whereas the code in PY3 possibly
+    # decodes the variable (see PY3 implementation of this function above)
+    def get_string(bytesorstring):
+        tmp = bytesorstring
+        if not(isinstance(bytesorstring, str) or isinstance(bytesorstring, unicode)):
+            raise ValueError('Expected str or unicode for %s:%s' % (type(bytesorstring), bytesorstring))
+        return tmp
+
+# sigh, python octal constants are a mess
+MODE_644 = int('644', 8)
+MODE_744 = int('744', 8)
+MODE_755 = int('755', 8)
+MODE_777 = int('777', 8)
+
+def conf(f):
+    # override in order to propagate the argument "mandatory"
+    def fun(*k, **kw):
+        mandatory = True
+        if 'mandatory' in kw:
+            mandatory = kw['mandatory']
+            del kw['mandatory']
+
+        try:
+            return f(*k, **kw)
+        except Errors.ConfigurationError:
+            if mandatory:
+                raise
+
+    fun.__name__ = f.__name__
+    if 'mandatory' in inspect.getsource(f):
+        fun = f
+
+    setattr(Configure.ConfigurationContext, f.__name__, fun)
+    setattr(Build.BuildContext, f.__name__, fun)
+    return f
+Configure.conf = conf
+Configure.conftest = conf
+
+@conf
+def SET_TARGET_TYPE(ctx, target, value):
+    '''set the target type of a target'''
+    cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
+    if target in cache and cache[target] != 'EMPTY':
+        Logs.error("ERROR: Target '%s' in directory %s re-defined as %s - was %s" % (target, ctx.path.abspath(), value, cache[target]))
+        sys.exit(1)
+    LOCAL_CACHE_SET(ctx, 'TARGET_TYPE', target, value)
+    debug("task_gen: Target '%s' created of type '%s' in %s" % (target, value, ctx.path.abspath()))
+    return True
+
+
+def GET_TARGET_TYPE(ctx, target):
+    '''get target type from cache'''
+    cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
+    if not target in cache:
+        return None
+    return cache[target]
+
+
+def ADD_LD_LIBRARY_PATH(path):
+    '''add something to LD_LIBRARY_PATH'''
+    if 'LD_LIBRARY_PATH' in os.environ:
+        oldpath = os.environ['LD_LIBRARY_PATH']
+    else:
+        oldpath = ''
+    newpath = oldpath.split(':')
+    if not path in newpath:
+        newpath.append(path)
+        os.environ['LD_LIBRARY_PATH'] = ':'.join(newpath)
+
+
+def needs_private_lib(bld, target):
+    '''return True if a target links to a private library'''
+    for lib in getattr(target, "final_libs", []):
+        t = bld.get_tgen_by_name(lib)
+        if t and getattr(t, 'private_library', False):
+            return True
+    return False
+
+
+def install_rpath(target):
+    '''the rpath value for installation'''
+    bld = target.bld
+    bld.env['RPATH'] = []
+    ret = set()
+    if bld.env.RPATH_ON_INSTALL:
+        ret.add(bld.EXPAND_VARIABLES(bld.env.LIBDIR))
+    if bld.env.RPATH_ON_INSTALL_PRIVATE and needs_private_lib(bld, target):
+        ret.add(bld.EXPAND_VARIABLES(bld.env.PRIVATELIBDIR))
+    return list(ret)
+
+
+def build_rpath(bld):
+    '''the rpath value for build'''
+    rpaths = [os.path.normpath('%s/%s' % (bld.env.BUILD_DIRECTORY, d)) for d in ("shared", "shared/private")]
+    bld.env['RPATH'] = []
+    if bld.env.RPATH_ON_BUILD:
+        return rpaths
+    for rpath in rpaths:
+        ADD_LD_LIBRARY_PATH(rpath)
+    return []
+
+
+@conf
+def LOCAL_CACHE(ctx, name):
+    '''return a named build cache dictionary, used to store
+       state inside other functions'''
+    if name in ctx.env:
+        return ctx.env[name]
+    ctx.env[name] = {}
+    return ctx.env[name]
+
+
+@conf
+def LOCAL_CACHE_SET(ctx, cachename, key, value):
+    '''set a value in a local cache'''
+    cache = LOCAL_CACHE(ctx, cachename)
+    cache[key] = value
+
+
+@conf
+def ASSERT(ctx, expression, msg):
+    '''a build assert call'''
+    if not expression:
+        raise Errors.WafError("ERROR: %s\n" % msg)
+Build.BuildContext.ASSERT = ASSERT
+
+
+def SUBDIR(bld, subdir, list):
+    '''create a list of files by pre-pending each with a subdir name'''
+    ret = ''
+    for l in TO_LIST(list):
+        ret = ret + os.path.normpath(os.path.join(subdir, l)) + ' '
+    return ret
+Build.BuildContext.SUBDIR = SUBDIR
+
+
+def dict_concat(d1, d2):
+    '''concatenate two dictionaries d1 += d2'''
+    for t in d2:
+        if t not in d1:
+            d1[t] = d2[t]
+
+def ADD_COMMAND(opt, name, function):
+    '''add a new top level command to waf'''
+    Context.g_module.__dict__[name] = function
+    opt.name = function
+Options.OptionsContext.ADD_COMMAND = ADD_COMMAND
+
+
+@feature('c', 'cc', 'cshlib', 'cprogram')
+@before('apply_core','exec_rule')
+def process_depends_on(self):
+    '''The new depends_on attribute for build rules
+       allow us to specify a dependency on output from
+       a source generation rule'''
+    if getattr(self , 'depends_on', None):
+        lst = self.to_list(self.depends_on)
+        for x in lst:
+            y = self.bld.get_tgen_by_name(x)
+            self.bld.ASSERT(y is not None, "Failed to find dependency %s of %s" % (x, self.name))
+            y.post()
+            if getattr(y, 'more_includes', None):
+                  self.includes += " " + y.more_includes
+
+
+def unique_list(seq):
+    '''return a uniquified list in the same order as the existing list'''
+    seen = {}
+    result = []
+    for item in seq:
+        if item in seen: continue
+        seen[item] = True
+        result.append(item)
+    return result
+
+
+def TO_LIST(str, delimiter=None):
+    '''Split a list, preserving quoted strings and existing lists'''
+    if str is None:
+        return []
+    if isinstance(str, list):
+        # we need to return a new independent list...
+        return list(str)
+    if len(str) == 0:
+        return []
+    lst = str.split(delimiter)
+    # the string may have had quotes in it, now we
+    # check if we did have quotes, and use the slower shlex
+    # if we need to
+    for e in lst:
+        if e[0] == '"':
+            return shlex.split(str)
+    return lst
+
+
+def subst_vars_error(string, env):
+    '''substitute vars, throw an error if a variable is not defined'''
+    lst = re.split(r'(\$\{\w+\})', string)
+    out = []
+    for v in lst:
+        if re.match(r'\$\{\w+\}', v):
+            vname = v[2:-1]
+            if not vname in env:
+                raise KeyError("Failed to find variable %s in %s in env %s <%s>" % (vname, string, env.__class__, str(env)))
+            v = env[vname]
+            if isinstance(v, list):
+                v = ' '.join(v)
+        out.append(v)
+    return ''.join(out)
+
+
+@conf
+def SUBST_ENV_VAR(ctx, varname):
+    '''Substitute an environment variable for any embedded variables'''
+    return subst_vars_error(ctx.env[varname], ctx.env)
+Build.BuildContext.SUBST_ENV_VAR = SUBST_ENV_VAR
+
+
+def recursive_dirlist(dir, relbase, pattern=None):
+    '''recursive directory list'''
+    ret = []
+    for f in os.listdir(dir):
+        f2 = dir + '/' + f
+        if os.path.isdir(f2):
+            ret.extend(recursive_dirlist(f2, relbase))
+        else:
+            if pattern and not fnmatch.fnmatch(f, pattern):
+                continue
+            ret.append(os.path.relpath(f2, relbase))
+    return ret
+
+
+def symlink(src, dst, force=True):
+    """Can create symlink by force"""
+    try:
+        os.symlink(src, dst)
+    except OSError as exc:
+        if exc.errno == errno.EEXIST and force:
+            os.remove(dst)
+            os.symlink(src, dst)
+        else:
+            raise
+
+
+def mkdir_p(dir):
+    '''like mkdir -p'''
+    if not dir:
+        return
+    if dir.endswith("/"):
+        mkdir_p(dir[:-1])
+        return
+    if os.path.isdir(dir):
+        return
+    mkdir_p(os.path.dirname(dir))
+    os.mkdir(dir)
+
+
+def SUBST_VARS_RECURSIVE(string, env):
+    '''recursively expand variables'''
+    if string is None:
+        return string
+    limit=100
+    while (string.find('${') != -1 and limit > 0):
+        string = subst_vars_error(string, env)
+        limit -= 1
+    return string
+
+
+@conf
+def EXPAND_VARIABLES(ctx, varstr, vars=None):
+    '''expand variables from a user supplied dictionary
+
+    This is most useful when you pass vars=locals() to expand
+    all your local variables in strings
+    '''
+
+    if isinstance(varstr, list):
+        ret = []
+        for s in varstr:
+            ret.append(EXPAND_VARIABLES(ctx, s, vars=vars))
+        return ret
+
+    if not isinstance(varstr, str):
+        return varstr
+
+    env = ConfigSet.ConfigSet()
+    ret = varstr
+    # substitute on user supplied dict if available
+    if vars is not None:
+        for v in vars.keys():
+            env[v] = vars[v]
+        ret = SUBST_VARS_RECURSIVE(ret, env)
+
+    # if anything left, subst on the environment as well
+    if ret.find('${') != -1:
+        ret = SUBST_VARS_RECURSIVE(ret, ctx.env)
+    # make sure there is nothing left. Also check for the common
+    # typo of $( instead of ${
+    if ret.find('${') != -1 or ret.find('$(') != -1:
+        Logs.error('Failed to substitute all variables in varstr=%s' % ret)
+        sys.exit(1)
+    return ret
+Build.BuildContext.EXPAND_VARIABLES = EXPAND_VARIABLES
+
+
+def RUN_COMMAND(cmd,
+                env=None,
+                shell=False):
+    '''run a external command, return exit code or signal'''
+    if env:
+        cmd = SUBST_VARS_RECURSIVE(cmd, env)
+
+    status = os.system(cmd)
+    if os.WIFEXITED(status):
+        return os.WEXITSTATUS(status)
+    if os.WIFSIGNALED(status):
+        return - os.WTERMSIG(status)
+    Logs.error("Unknown exit reason %d for command: %s" % (status, cmd))
+    return -1
+
+
+def RUN_PYTHON_TESTS(testfiles, pythonpath=None, extra_env=None):
+    env = LOAD_ENVIRONMENT()
+    if pythonpath is None:
+        pythonpath = os.path.join(Context.g_module.out, 'python')
+    result = 0
+    for interp in env.python_interpreters:
+        if not isinstance(interp, str):
+            interp = ' '.join(interp)
+        for testfile in testfiles:
+            cmd = "PYTHONPATH=%s %s %s" % (pythonpath, interp, testfile)
+            if extra_env:
+                for key, value in extra_env.items():
+                    cmd = "%s=%s %s" % (key, value, cmd)
+            print('Running Python test with %s: %s' % (interp, testfile))
+            ret = RUN_COMMAND(cmd)
+            if ret:
+                print('Python test failed: %s' % cmd)
+                result = ret
+    return result
+
+
+# make sure we have md5. some systems don't have it
+try:
+    from hashlib import md5
+    # Even if hashlib.md5 exists, it may be unusable.
+    # Try to use MD5 function. In FIPS mode this will cause an exception
+    # and we'll get to the replacement code
+    foo = md5(b'abcd')
+except:
+    try:
+        import md5
+        # repeat the same check here, mere success of import is not enough.
+        # Try to use MD5 function. In FIPS mode this will cause an exception
+        foo = md5.md5(b'abcd')
+    except:
+        Context.SIG_NIL = hash('abcd')
+        class replace_md5(object):
+            def __init__(self):
+                self.val = None
+            def update(self, val):
+                self.val = hash((self.val, val))
+            def digest(self):
+                return str(self.val)
+            def hexdigest(self):
+                return self.digest().encode('hex')
+        def replace_h_file(filename):
+            f = open(filename, 'rb')
+            m = replace_md5()
+            while (filename):
+                filename = f.read(100000)
+                m.update(filename)
+            f.close()
+            return m.digest()
+        Utils.md5 = replace_md5
+        Task.md5 = replace_md5
+        Utils.h_file = replace_h_file
+
+
+def LOAD_ENVIRONMENT():
+    '''load the configuration environment, allowing access to env vars
+       from new commands'''
+    env = ConfigSet.ConfigSet()
+    try:
+        p = os.path.join(Context.g_module.out, 'c4che/default'+CACHE_SUFFIX)
+        env.load(p)
+    except (OSError, IOError):
+        pass
+    return env
+
+
+def IS_NEWER(bld, file1, file2):
+    '''return True if file1 is newer than file2'''
+    curdir = bld.path.abspath()
+    t1 = os.stat(os.path.join(curdir, file1)).st_mtime
+    t2 = os.stat(os.path.join(curdir, file2)).st_mtime
+    return t1 > t2
+Build.BuildContext.IS_NEWER = IS_NEWER
+
+
+@conf
+def RECURSE(ctx, directory):
+    '''recurse into a directory, relative to the curdir or top level'''
+    try:
+        visited_dirs = ctx.visited_dirs
+    except AttributeError:
+        visited_dirs = ctx.visited_dirs = set()
+    d = os.path.join(ctx.path.abspath(), directory)
+    if os.path.exists(d):
+        abspath = os.path.abspath(d)
+    else:
+        abspath = os.path.abspath(os.path.join(Context.g_module.top, directory))
+    ctxclass = ctx.__class__.__name__
+    key = ctxclass + ':' + abspath
+    if key in visited_dirs:
+        # already done it
+        return
+    visited_dirs.add(key)
+    relpath = os.path.relpath(abspath, ctx.path.abspath())
+    if ctxclass in ['OptionsContext',
+                    'ConfigurationContext',
+                    'BuildContext',
+                    'CleanContext',
+                    'InstallContext',
+                    'UninstallContext',
+                    'ListContext']:
+        return ctx.recurse(relpath)
+    if 'waflib.extras.compat15' in sys.modules:
+        return ctx.recurse(relpath)
+    raise Errors.WafError('Unknown RECURSE context class: {}'.format(ctxclass))
+Options.OptionsContext.RECURSE = RECURSE
+Build.BuildContext.RECURSE = RECURSE
+
+
+def CHECK_MAKEFLAGS(options):
+    '''check for MAKEFLAGS environment variable in case we are being
+    called from a Makefile try to honor a few make command line flags'''
+    if not 'WAF_MAKE' in os.environ:
+        return
+    makeflags = os.environ.get('MAKEFLAGS')
+    if makeflags is None:
+        makeflags = ""
+    jobs_set = False
+    jobs = None
+    # we need to use shlex.split to cope with the escaping of spaces
+    # in makeflags
+    for opt in shlex.split(makeflags):
+        # options can come either as -x or as x
+        if opt[0:2] == 'V=':
+            options.verbose = Logs.verbose = int(opt[2:])
+            if Logs.verbose > 0:
+                Logs.zones = ['runner']
+            if Logs.verbose > 2:
+                Logs.zones = ['*']
+        elif opt[0].isupper() and opt.find('=') != -1:
+            # this allows us to set waf options on the make command line
+            # for example, if you do "make FOO=blah", then we set the
+            # option 'FOO' in Options.options, to blah. If you look in wafsamba/wscript
+            # you will see that the command line accessible options have their dest=
+            # set to uppercase, to allow for passing of options from make in this way
+            # this is also how "make test TESTS=testpattern" works, and
+            # "make VERBOSE=1" as well as things like "make SYMBOLCHECK=1"
+            loc = opt.find('=')
+            setattr(options, opt[0:loc], opt[loc+1:])
+        elif opt[0] != '-':
+            for v in opt:
+                if re.search(r'j[0-9]*$', v):
+                    jobs_set = True
+                    jobs = opt.strip('j')
+                elif v == 'k':
+                    options.keep = True
+        elif re.search(r'-j[0-9]*$', opt):
+            jobs_set = True
+            jobs = opt.strip('-j')
+        elif opt == '-k':
+            options.keep = True
+    if not jobs_set:
+        # default to one job
+        options.jobs = 1
+    elif jobs_set and jobs:
+        options.jobs = int(jobs)
+
+waflib_options_parse_cmd_args = Options.OptionsContext.parse_cmd_args
+def wafsamba_options_parse_cmd_args(self, _args=None, cwd=None, allow_unknown=False):
+    (options, commands, envvars) = \
+        waflib_options_parse_cmd_args(self,
+                                      _args=_args,
+                                      cwd=cwd,
+                                      allow_unknown=allow_unknown)
+    CHECK_MAKEFLAGS(options)
+    if options.jobs == 1:
+        #
+        # waflib.Runner.Parallel processes jobs inline if the possible number
+        # of jobs is just 1. But (at least in waf <= 2.0.12) it still calls
+        # create a waflib.Runner.Spawner() which creates a single
+        # waflib.Runner.Consumer() thread that tries to process jobs from the
+        # queue.
+        #
+        # This has strange effects, which are not noticed typically,
+        # but at least on AIX python has broken threading and fails
+        # in random ways.
+        #
+        # So we just add a dummy Spawner class.
+        class NoOpSpawner(object):
+            def __init__(self, master):
+                return
+        from waflib import Runner
+        Runner.Spawner = NoOpSpawner
+    return options, commands, envvars
+Options.OptionsContext.parse_cmd_args = wafsamba_options_parse_cmd_args
+
+option_groups = {}
+
+def option_group(opt, name):
+    '''find or create an option group'''
+    global option_groups
+    if name in option_groups:
+        return option_groups[name]
+    gr = opt.add_option_group(name)
+    option_groups[name] = gr
+    return gr
+Options.OptionsContext.option_group = option_group
+
+
+def save_file(filename, contents, create_dir=False):
+    '''save data to a file'''
+    if create_dir:
+        mkdir_p(os.path.dirname(filename))
+    try:
+        f = open(filename, 'w')
+        f.write(contents)
+        f.close()
+    except:
+        return False
+    return True
+
+
+def load_file(filename):
+    '''return contents of a file'''
+    try:
+        f = open(filename, 'r')
+        r = f.read()
+        f.close()
+    except:
+        return None
+    return r
+
+
+def reconfigure(ctx):
+    '''rerun configure if necessary'''
+    if not os.path.exists(os.environ.get('WAFLOCK', '.lock-wscript')):
+        raise Errors.WafError('configure has not been run')
+    import samba_wildcard
+    bld = samba_wildcard.fake_build_environment()
+    Configure.autoconfig = True
+    Scripting.check_configured(bld)
+
+
+def map_shlib_extension(ctx, name, python=False):
+    '''map a filename with a shared library extension of .so to the real shlib name'''
+    if name is None:
+        return None
+    if name[-1:].isdigit():
+        # some libraries have specified versions in the wscript rule
+        return name
+    (root1, ext1) = os.path.splitext(name)
+    if python:
+        return ctx.env.pyext_PATTERN % root1
+    else:
+        (root2, ext2) = os.path.splitext(ctx.env.cshlib_PATTERN)
+    return root1+ext2
+Build.BuildContext.map_shlib_extension = map_shlib_extension
+
+def apply_pattern(filename, pattern):
+    '''apply a filename pattern to a filename that may have a directory component'''
+    dirname = os.path.dirname(filename)
+    if not dirname:
+        return pattern % filename
+    basename = os.path.basename(filename)
+    return os.path.join(dirname, pattern % basename)
+
+def make_libname(ctx, name, nolibprefix=False, version=None, python=False):
+    """make a library filename
+         Options:
+              nolibprefix: don't include the lib prefix
+              version    : add a version number
+              python     : if we should use python module name conventions"""
+
+    if python:
+        libname = apply_pattern(name, ctx.env.pyext_PATTERN)
+    else:
+        libname = apply_pattern(name, ctx.env.cshlib_PATTERN)
+    if nolibprefix and libname[0:3] == 'lib':
+        libname = libname[3:]
+    if version:
+        if version[0] == '.':
+            version = version[1:]
+        (root, ext) = os.path.splitext(libname)
+        if ext == ".dylib":
+            # special case - version goes before the prefix
+            libname = "%s.%s%s" % (root, version, ext)
+        else:
+            libname = "%s%s.%s" % (root, ext, version)
+    return libname
+Build.BuildContext.make_libname = make_libname
+
+
+def get_tgt_list(bld):
+    '''return a list of build objects for samba'''
+
+    targets = LOCAL_CACHE(bld, 'TARGET_TYPE')
+
+    # build a list of task generators we are interested in
+    tgt_list = []
+    for tgt in targets:
+        type = targets[tgt]
+        if not type in ['SUBSYSTEM', 'BUILTIN', 'MODULE', 'BINARY', 'LIBRARY', 'PLUGIN', 'ASN1', 'PYTHON']:
+            continue
+        t = bld.get_tgen_by_name(tgt)
+        if t is None:
+            Logs.error("Target %s of type %s has no task generator" % (tgt, type))
+            sys.exit(1)
+        tgt_list.append(t)
+    return tgt_list
+
+from waflib.Context import WSCRIPT_FILE
+def PROCESS_SEPARATE_RULE(self, rule):
+    ''' cause waf to process additional script based on `rule'.
+        You should have file named wscript_<stage>_rule in the current directory
+        where stage is either 'configure' or 'build'
+    '''
+    stage = ''
+    if isinstance(self, Configure.ConfigurationContext):
+        stage = 'configure'
+    elif isinstance(self, Build.BuildContext):
+        stage = 'build'
+    file_path = os.path.join(self.path.abspath(), WSCRIPT_FILE+'_'+stage+'_'+rule)
+    node = self.root.find_node(file_path)
+    if node:
+        try:
+            cache = self.recurse_cache
+        except AttributeError:
+            cache = self.recurse_cache = {}
+        if node not in cache:
+            cache[node] = True
+            self.pre_recurse(node)
+            try:
+                function_code = node.read('r', None)
+                exec(compile(function_code, node.abspath(), 'exec'), self.exec_dict)
+            finally:
+                self.post_recurse(node)
+
+Build.BuildContext.PROCESS_SEPARATE_RULE = PROCESS_SEPARATE_RULE
+ConfigurationContext.PROCESS_SEPARATE_RULE = PROCESS_SEPARATE_RULE
+
+def AD_DC_BUILD_IS_ENABLED(self):
+    if self.CONFIG_SET('AD_DC_BUILD_IS_ENABLED'):
+        return True
+    return False
+
+Build.BuildContext.AD_DC_BUILD_IS_ENABLED = AD_DC_BUILD_IS_ENABLED
+
+@feature('cprogram', 'cshlib', 'cstaticlib')
+@after('apply_lib_vars')
+@before('apply_obj_vars')
+def samba_before_apply_obj_vars(self):
+    """before apply_obj_vars for uselib, this removes the standard paths"""
+
+    def is_standard_libpath(env, path):
+        normalized_path = os.path.normpath(path)
+        for _path in env.STANDARD_LIBPATH:
+            if _path == normalized_path:
+                return True
+        return False
+
+    v = self.env
+
+    for i in v['RPATH']:
+        if is_standard_libpath(v, i):
+            v['RPATH'].remove(i)
+
+    for i in v['LIBPATH']:
+        if is_standard_libpath(v, i):
+            v['LIBPATH'].remove(i)
+
+# Samba options are mostly on by default (administrators and packagers
+# specify features to remove, not add), which is why default=True
+
+def samba_add_onoff_option(opt, option, help=(), dest=None, default=True,
+                           with_name="with", without_name="without"):
+    if default is None:
+        default_str = "auto"
+    elif default is True:
+        default_str = "yes"
+    elif default is False:
+        default_str = "no"
+    else:
+        default_str = str(default)
+
+    if help == ():
+        help = ("Build with %s support (default=%s)" % (option, default_str))
+    if dest is None:
+        dest = "with_%s" % option.replace('-', '_')
+
+    with_val = "--%s-%s" % (with_name, option)
+    without_val = "--%s-%s" % (without_name, option)
+
+    opt.add_option(with_val, help=help, action="store_true", dest=dest,
+                   default=default)
+    opt.add_option(without_val, help=SUPPRESS_HELP, action="store_false",
+                   dest=dest)
+Options.OptionsContext.samba_add_onoff_option = samba_add_onoff_option