buildtools/wafsamba/samba_utils.py

   1 # a waf tool to add autoconf-like macros to the configure section
   2 # and for SAMBA_ macros for building libraries, binaries etc
   3
   4 import os, sys, re, fnmatch, shlex, inspect
   5 from optparse import SUPPRESS_HELP
   6 from waflib import Build, Options, Utils, Task, Logs, Configure, Errors, Context
   7 from waflib.TaskGen import feature, before, after
   8 from waflib.Configure import ConfigurationContext
   9 from waflib.Logs import debug
  10 from waflib import ConfigSet
  11 from waflib.Build import CACHE_SUFFIX
  12
  13 # TODO: make this a --option
  14 LIB_PATH="shared"
  15
  16
  17 # sigh, python octal constants are a mess
  18 MODE_644 = int('644', 8)
  19 MODE_755 = int('755', 8)
  20
  21 def conf(f):
  22     # override in order to propagate the argument "mandatory"
  23     def fun(*k, **kw):
  24         mandatory = True
  25         if 'mandatory' in kw:
  26             mandatory = kw['mandatory']
  27             del kw['mandatory']
  28
  29         try:
  30             return f(*k, **kw)
  31         except Errors.ConfigurationError:
  32             if mandatory:
  33                 raise
  34
  35     fun.__name__ = f.__name__
  36     if 'mandatory' in inspect.getsource(f):
  37         fun = f
  38
  39     setattr(Configure.ConfigurationContext, f.__name__, fun)
  40     setattr(Build.BuildContext, f.__name__, fun)
  41     return f
  42 Configure.conf = conf
  43 Configure.conftest = conf
  44
  45 @conf
  46 def SET_TARGET_TYPE(ctx, target, value):
  47     '''set the target type of a target'''
  48     cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
  49     if target in cache and cache[target] != 'EMPTY':
  50         Logs.error("ERROR: Target '%s' in directory %s re-defined as %s - was %s" % (target, ctx.path.abspath(), value, cache[target]))
  51         sys.exit(1)
  52     LOCAL_CACHE_SET(ctx, 'TARGET_TYPE', target, value)
  53     debug("task_gen: Target '%s' created of type '%s' in %s" % (target, value, ctx.path.abspath()))
  54     return True
  55
  56
  57 def GET_TARGET_TYPE(ctx, target):
  58     '''get target type from cache'''
  59     cache = LOCAL_CACHE(ctx, 'TARGET_TYPE')
  60     if not target in cache:
  61         return None
  62     return cache[target]
  63
  64
  65 def ADD_LD_LIBRARY_PATH(path):
  66     '''add something to LD_LIBRARY_PATH'''
  67     if 'LD_LIBRARY_PATH' in os.environ:
  68         oldpath = os.environ['LD_LIBRARY_PATH']
  69     else:
  70         oldpath = ''
  71     newpath = oldpath.split(':')
  72     if not path in newpath:
  73         newpath.append(path)
  74         os.environ['LD_LIBRARY_PATH'] = ':'.join(newpath)
  75
  76
  77 def needs_private_lib(bld, target):
  78     '''return True if a target links to a private library'''
  79     for lib in getattr(target, "final_libs", []):
  80         t = bld.get_tgen_by_name(lib)
  81         if t and getattr(t, 'private_library', False):
  82             return True
  83     return False
  84
  85
  86 def install_rpath(target):
  87     '''the rpath value for installation'''
  88     bld = target.bld
  89     bld.env['RPATH'] = []
  90     ret = set()
  91     if bld.env.RPATH_ON_INSTALL:
  92         ret.add(bld.EXPAND_VARIABLES(bld.env.LIBDIR))
  93     if bld.env.RPATH_ON_INSTALL_PRIVATE and needs_private_lib(bld, target):
  94         ret.add(bld.EXPAND_VARIABLES(bld.env.PRIVATELIBDIR))
  95     return list(ret)
  96
  97
  98 def build_rpath(bld):
  99     '''the rpath value for build'''
 100     rpaths = [os.path.normpath('%s/%s' % (bld.env.BUILD_DIRECTORY, d)) for d in ("shared", "shared/private")]
 101     bld.env['RPATH'] = []
 102     if bld.env.RPATH_ON_BUILD:
 103         return rpaths
 104     for rpath in rpaths:
 105         ADD_LD_LIBRARY_PATH(rpath)
 106     return []
 107
 108
 109 @conf
 110 def LOCAL_CACHE(ctx, name):
 111     '''return a named build cache dictionary, used to store
 112        state inside other functions'''
 113     if name in ctx.env:
 114         return ctx.env[name]
 115     ctx.env[name] = {}
 116     return ctx.env[name]
 117
 118
 119 @conf
 120 def LOCAL_CACHE_SET(ctx, cachename, key, value):
 121     '''set a value in a local cache'''
 122     cache = LOCAL_CACHE(ctx, cachename)
 123     cache[key] = value
 124
 125
 126 @conf
 127 def ASSERT(ctx, expression, msg):
 128     '''a build assert call'''
 129     if not expression:
 130         raise Errors.WafError("ERROR: %s\n" % msg)
 131 Build.BuildContext.ASSERT = ASSERT
 132
 133
 134 def SUBDIR(bld, subdir, list):
 135     '''create a list of files by pre-pending each with a subdir name'''
 136     ret = ''
 137     for l in TO_LIST(list):
 138         ret = ret + os.path.normpath(os.path.join(subdir, l)) + ' '
 139     return ret
 140 Build.BuildContext.SUBDIR = SUBDIR
 141
 142
 143 def dict_concat(d1, d2):
 144     '''concatenate two dictionaries d1 += d2'''
 145     for t in d2:
 146         if t not in d1:
 147             d1[t] = d2[t]
 148
 149 def ADD_COMMAND(opt, name, function):
 150     '''add a new top level command to waf'''
 151     Context.g_module.__dict__[name] = function
 152     opt.name = function
 153 Options.OptionsContext.ADD_COMMAND = ADD_COMMAND
 154
 155
 156 @feature('c', 'cc', 'cshlib', 'cprogram')
 157 @before('apply_core','exec_rule')
 158 def process_depends_on(self):
 159     '''The new depends_on attribute for build rules
 160        allow us to specify a dependency on output from
 161        a source generation rule'''
 162     if getattr(self , 'depends_on', None):
 163         lst = self.to_list(self.depends_on)
 164         for x in lst:
 165             y = self.bld.get_tgen_by_name(x)
 166             self.bld.ASSERT(y is not None, "Failed to find dependency %s of %s" % (x, self.name))
 167             y.post()
 168             if getattr(y, 'more_includes', None):
 169                   self.includes += " " + y.more_includes
 170
 171
 172 os_path_relpath = getattr(os.path, 'relpath', None)
 173 if os_path_relpath is None:
 174     # Python < 2.6 does not have os.path.relpath, provide a replacement
 175     # (imported from Python2.6.5~rc2)
 176     def os_path_relpath(path, start):
 177         """Return a relative version of a path"""
 178         start_list = os.path.abspath(start).split("/")
 179         path_list = os.path.abspath(path).split("/")
 180
 181         # Work out how much of the filepath is shared by start and path.
 182         i = len(os.path.commonprefix([start_list, path_list]))
 183
 184         rel_list = ['..'] * (len(start_list)-i) + path_list[i:]
 185         if not rel_list:
 186             return start
 187         return os.path.join(*rel_list)
 188
 189
 190 def unique_list(seq):
 191     '''return a uniquified list in the same order as the existing list'''
 192     seen = {}
 193     result = []
 194     for item in seq:
 195         if item in seen: continue
 196         seen[item] = True
 197         result.append(item)
 198     return result
 199
 200
 201 def TO_LIST(str, delimiter=None):
 202     '''Split a list, preserving quoted strings and existing lists'''
 203     if str is None:
 204         return []
 205     if isinstance(str, list):
 206         # we need to return a new independent list...
 207         return list(str)
 208     if len(str) == 0:
 209         return []
 210     lst = str.split(delimiter)
 211     # the string may have had quotes in it, now we
 212     # check if we did have quotes, and use the slower shlex
 213     # if we need to
 214     for e in lst:
 215         if e[0] == '"':
 216             return shlex.split(str)
 217     return lst
 218
 219
 220 def subst_vars_error(string, env):
 221     '''substitute vars, throw an error if a variable is not defined'''
 222     lst = re.split('(\$\{\w+\})', string)
 223     out = []
 224     for v in lst:
 225         if re.match('\$\{\w+\}', v):
 226             vname = v[2:-1]
 227             if not vname in env:
 228                 raise KeyError("Failed to find variable %s in %s in env %s <%s>" % (vname, string, env.__class__, str(env)))
 229             v = env[vname]
 230             if isinstance(v, list):
 231                 v = ' '.join(v)
 232         out.append(v)
 233     return ''.join(out)
 234
 235
 236 @conf
 237 def SUBST_ENV_VAR(ctx, varname):
 238     '''Substitute an environment variable for any embedded variables'''
 239     return subst_vars_error(ctx.env[varname], ctx.env)
 240 Build.BuildContext.SUBST_ENV_VAR = SUBST_ENV_VAR
 241
 242
 243 def recursive_dirlist(dir, relbase, pattern=None):
 244     '''recursive directory list'''
 245     ret = []
 246     for f in os.listdir(dir):
 247         f2 = dir + '/' + f
 248         if os.path.isdir(f2):
 249             ret.extend(recursive_dirlist(f2, relbase))
 250         else:
 251             if pattern and not fnmatch.fnmatch(f, pattern):
 252                 continue
 253             ret.append(os_path_relpath(f2, relbase))
 254     return ret
 255
 256
 257 def mkdir_p(dir):
 258     '''like mkdir -p'''
 259     if not dir:
 260         return
 261     if dir.endswith("/"):
 262         mkdir_p(dir[:-1])
 263         return
 264     if os.path.isdir(dir):
 265         return
 266     mkdir_p(os.path.dirname(dir))
 267     os.mkdir(dir)
 268
 269
 270 def SUBST_VARS_RECURSIVE(string, env):
 271     '''recursively expand variables'''
 272     if string is None:
 273         return string
 274     limit=100
 275     while (string.find('${') != -1 and limit > 0):
 276         string = subst_vars_error(string, env)
 277         limit -= 1
 278     return string
 279
 280
 281 @conf
 282 def EXPAND_VARIABLES(ctx, varstr, vars=None):
 283     '''expand variables from a user supplied dictionary
 284
 285     This is most useful when you pass vars=locals() to expand
 286     all your local variables in strings
 287     '''
 288
 289     if isinstance(varstr, list):
 290         ret = []
 291         for s in varstr:
 292             ret.append(EXPAND_VARIABLES(ctx, s, vars=vars))
 293         return ret
 294
 295     if not isinstance(varstr, str):
 296         return varstr
 297
 298     env = ConfigSet.ConfigSet()
 299     ret = varstr
 300     # substitute on user supplied dict if avaiilable
 301     if vars is not None:
 302         for v in vars.keys():
 303             env[v] = vars[v]
 304         ret = SUBST_VARS_RECURSIVE(ret, env)
 305
 306     # if anything left, subst on the environment as well
 307     if ret.find('${') != -1:
 308         ret = SUBST_VARS_RECURSIVE(ret, ctx.env)
 309     # make sure there is nothing left. Also check for the common
 310     # typo of $( instead of ${
 311     if ret.find('${') != -1 or ret.find('$(') != -1:
 312         Logs.error('Failed to substitute all variables in varstr=%s' % ret)
 313         sys.exit(1)
 314     return ret
 315 Build.BuildContext.EXPAND_VARIABLES = EXPAND_VARIABLES
 316
 317
 318 def RUN_COMMAND(cmd,
 319                 env=None,
 320                 shell=False):
 321     '''run a external command, return exit code or signal'''
 322     if env:
 323         cmd = SUBST_VARS_RECURSIVE(cmd, env)
 324
 325     status = os.system(cmd)
 326     if os.WIFEXITED(status):
 327         return os.WEXITSTATUS(status)
 328     if os.WIFSIGNALED(status):
 329         return - os.WTERMSIG(status)
 330     Logs.error("Unknown exit reason %d for command: %s" (status, cmd))
 331     return -1
 332
 333
 334 def RUN_PYTHON_TESTS(testfiles, pythonpath=None, extra_env=None):
 335     env = LOAD_ENVIRONMENT()
 336     if pythonpath is None:
 337         pythonpath = os.path.join(Context.g_module.out, 'python')
 338     result = 0
 339     for interp in env.python_interpreters:
 340         if not isinstance(interp, str):
 341             interp = ' '.join(interp)
 342         for testfile in testfiles:
 343             cmd = "PYTHONPATH=%s %s %s" % (pythonpath, interp, testfile)
 344             if extra_env:
 345                 for key, value in extra_env.items():
 346                     cmd = "%s=%s %s" % (key, value, cmd)
 347             print('Running Python test with %s: %s' % (interp, testfile))
 348             ret = RUN_COMMAND(cmd)
 349             if ret:
 350                 print('Python test failed: %s' % cmd)
 351                 result = ret
 352     return result
 353
 354
 355 # make sure we have md5. some systems don't have it
 356 try:
 357     from hashlib import md5
 358     # Even if hashlib.md5 exists, it may be unusable.
 359     # Try to use MD5 function. In FIPS mode this will cause an exception
 360     # and we'll get to the replacement code
 361     foo = md5(b'abcd')
 362 except:
 363     try:
 364         import md5
 365         # repeat the same check here, mere success of import is not enough.
 366         # Try to use MD5 function. In FIPS mode this will cause an exception
 367         foo = md5.md5(b'abcd')
 368     except:
 369         Context.SIG_NIL = hash('abcd')
 370         class replace_md5(object):
 371             def __init__(self):
 372                 self.val = None
 373             def update(self, val):
 374                 self.val = hash((self.val, val))
 375             def digest(self):
 376                 return str(self.val)
 377             def hexdigest(self):
 378                 return self.digest().encode('hex')
 379         def replace_h_file(filename):
 380             f = open(filename, 'rb')
 381             m = replace_md5()
 382             while (filename):
 383                 filename = f.read(100000)
 384                 m.update(filename)
 385             f.close()
 386             return m.digest()
 387         Utils.md5 = replace_md5
 388         Task.md5 = replace_md5
 389         Utils.h_file = replace_h_file
 390
 391
 392 def LOAD_ENVIRONMENT():
 393     '''load the configuration environment, allowing access to env vars
 394        from new commands'''
 395     env = ConfigSet.ConfigSet()
 396     try:
 397         p = os.path.join(Context.g_module.out, 'c4che/default'+CACHE_SUFFIX)
 398         env.load(p)
 399     except (OSError, IOError):
 400         pass
 401     return env
 402
 403
 404 def IS_NEWER(bld, file1, file2):
 405     '''return True if file1 is newer than file2'''
 406     curdir = bld.path.abspath()
 407     t1 = os.stat(os.path.join(curdir, file1)).st_mtime
 408     t2 = os.stat(os.path.join(curdir, file2)).st_mtime
 409     return t1 > t2
 410 Build.BuildContext.IS_NEWER = IS_NEWER
 411
 412
 413 @conf
 414 def RECURSE(ctx, directory):
 415     '''recurse into a directory, relative to the curdir or top level'''
 416     try:
 417         visited_dirs = ctx.visited_dirs
 418     except AttributeError:
 419         visited_dirs = ctx.visited_dirs = set()
 420     d = os.path.join(ctx.path.abspath(), directory)
 421     if os.path.exists(d):
 422         abspath = os.path.abspath(d)
 423     else:
 424         abspath = os.path.abspath(os.path.join(Context.g_module.top, directory))
 425     ctxclass = ctx.__class__.__name__
 426     key = ctxclass + ':' + abspath
 427     if key in visited_dirs:
 428         # already done it
 429         return
 430     visited_dirs.add(key)
 431     relpath = os_path_relpath(abspath, ctx.path.abspath())
 432     if ctxclass in ['tmp', 'OptionsContext', 'ConfigurationContext', 'BuildContext']:
 433         return ctx.recurse(relpath)
 434     if 'waflib.extras.compat15' in sys.modules:
 435         return ctx.recurse(relpath)
 436     Logs.error('Unknown RECURSE context class: {}'.format(ctxclass))
 437     raise
 438 Options.OptionsContext.RECURSE = RECURSE
 439 Build.BuildContext.RECURSE = RECURSE
 440
 441
 442 def CHECK_MAKEFLAGS(bld):
 443     '''check for MAKEFLAGS environment variable in case we are being
 444     called from a Makefile try to honor a few make command line flags'''
 445     if not 'WAF_MAKE' in os.environ:
 446         return
 447     makeflags = os.environ.get('MAKEFLAGS')
 448     if makeflags is None:
 449         return
 450     jobs_set = False
 451     jobs = None
 452     # we need to use shlex.split to cope with the escaping of spaces
 453     # in makeflags
 454     for opt in shlex.split(makeflags):
 455         # options can come either as -x or as x
 456         if opt[0:2] == 'V=':
 457             Options.options.verbose = Logs.verbose = int(opt[2:])
 458             if Logs.verbose > 0:
 459                 Logs.zones = ['runner']
 460             if Logs.verbose > 2:
 461                 Logs.zones = ['*']
 462         elif opt[0].isupper() and opt.find('=') != -1:
 463             # this allows us to set waf options on the make command line
 464             # for example, if you do "make FOO=blah", then we set the
 465             # option 'FOO' in Options.options, to blah. If you look in wafsamba/wscript
 466             # you will see that the command line accessible options have their dest=
 467             # set to uppercase, to allow for passing of options from make in this way
 468             # this is also how "make test TESTS=testpattern" works, and
 469             # "make VERBOSE=1" as well as things like "make SYMBOLCHECK=1"
 470             loc = opt.find('=')
 471             setattr(Options.options, opt[0:loc], opt[loc+1:])
 472         elif opt[0] != '-':
 473             for v in opt:
 474                 if re.search(r'j[0-9]*$', v):
 475                     jobs_set = True
 476                     jobs = opt.strip('j')
 477                 elif v == 'k':
 478                     Options.options.keep = True
 479         elif re.search(r'-j[0-9]*$', opt):
 480             jobs_set = True
 481             jobs = opt.strip('-j')
 482         elif opt == '-k':
 483             Options.options.keep = True
 484     if not jobs_set:
 485         # default to one job
 486         Options.options.jobs = 1
 487     elif jobs_set and jobs:
 488         Options.options.jobs = int(jobs)
 489
 490 Build.BuildContext.CHECK_MAKEFLAGS = CHECK_MAKEFLAGS
 491
 492 option_groups = {}
 493
 494 def option_group(opt, name):
 495     '''find or create an option group'''
 496     global option_groups
 497     if name in option_groups:
 498         return option_groups[name]
 499     gr = opt.add_option_group(name)
 500     option_groups[name] = gr
 501     return gr
 502 Options.OptionsContext.option_group = option_group
 503
 504
 505 def save_file(filename, contents, create_dir=False):
 506     '''save data to a file'''
 507     if create_dir:
 508         mkdir_p(os.path.dirname(filename))
 509     try:
 510         f = open(filename, 'w')
 511         f.write(contents)
 512         f.close()
 513     except:
 514         return False
 515     return True
 516
 517
 518 def load_file(filename):
 519     '''return contents of a file'''
 520     try:
 521         f = open(filename, 'r')
 522         r = f.read()
 523         f.close()
 524     except:
 525         return None
 526     return r
 527
 528
 529 def reconfigure(ctx):
 530     '''rerun configure if necessary'''
 531     if not os.path.exists(".lock-wscript"):
 532         raise Errors.WafError('configure has not been run')
 533     import samba_wildcard
 534     bld = samba_wildcard.fake_build_environment()
 535     Configure.autoconfig = True
 536     Scripting.check_configured(bld)
 537
 538
 539 def map_shlib_extension(ctx, name, python=False):
 540     '''map a filename with a shared library extension of .so to the real shlib name'''
 541     if name is None:
 542         return None
 543     if name[-1:].isdigit():
 544         # some libraries have specified versions in the wscript rule
 545         return name
 546     (root1, ext1) = os.path.splitext(name)
 547     if python:
 548         return ctx.env.pyext_PATTERN % root1
 549     else:
 550         (root2, ext2) = os.path.splitext(ctx.env.cshlib_PATTERN)
 551     return root1+ext2
 552 Build.BuildContext.map_shlib_extension = map_shlib_extension
 553
 554 def apply_pattern(filename, pattern):
 555     '''apply a filename pattern to a filename that may have a directory component'''
 556     dirname = os.path.dirname(filename)
 557     if not dirname:
 558         return pattern % filename
 559     basename = os.path.basename(filename)
 560     return os.path.join(dirname, pattern % basename)
 561
 562 def make_libname(ctx, name, nolibprefix=False, version=None, python=False):
 563     """make a library filename
 564          Options:
 565               nolibprefix: don't include the lib prefix
 566               version    : add a version number
 567               python     : if we should use python module name conventions"""
 568
 569     if python:
 570         libname = apply_pattern(name, ctx.env.pyext_PATTERN)
 571     else:
 572         libname = apply_pattern(name, ctx.env.cshlib_PATTERN)
 573     if nolibprefix and libname[0:3] == 'lib':
 574         libname = libname[3:]
 575     if version:
 576         if version[0] == '.':
 577             version = version[1:]
 578         (root, ext) = os.path.splitext(libname)
 579         if ext == ".dylib":
 580             # special case - version goes before the prefix
 581             libname = "%s.%s%s" % (root, version, ext)
 582         else:
 583             libname = "%s%s.%s" % (root, ext, version)
 584     return libname
 585 Build.BuildContext.make_libname = make_libname
 586
 587
 588 def get_tgt_list(bld):
 589     '''return a list of build objects for samba'''
 590
 591     targets = LOCAL_CACHE(bld, 'TARGET_TYPE')
 592
 593     # build a list of task generators we are interested in
 594     tgt_list = []
 595     for tgt in targets:
 596         type = targets[tgt]
 597         if not type in ['SUBSYSTEM', 'MODULE', 'BINARY', 'LIBRARY', 'ASN1', 'PYTHON']:
 598             continue
 599         t = bld.get_tgen_by_name(tgt)
 600         if t is None:
 601             Logs.error("Target %s of type %s has no task generator" % (tgt, type))
 602             sys.exit(1)
 603         tgt_list.append(t)
 604     return tgt_list
 605
 606 from waflib.Context import WSCRIPT_FILE
 607 def PROCESS_SEPARATE_RULE(self, rule):
 608     ''' cause waf to process additional script based on `rule'.
 609         You should have file named wscript_<stage>_rule in the current directory
 610         where stage is either 'configure' or 'build'
 611     '''
 612     stage = ''
 613     if isinstance(self, Configure.ConfigurationContext):
 614         stage = 'configure'
 615     elif isinstance(self, Build.BuildContext):
 616         stage = 'build'
 617     file_path = os.path.join(self.path.abspath(), WSCRIPT_FILE+'_'+stage+'_'+rule)
 618     node = self.root.find_node(file_path)
 619     if node:
 620         try:
 621             cache = self.recurse_cache
 622         except AttributeError:
 623             cache = self.recurse_cache = {}
 624         if node not in cache:
 625             cache[node] = True
 626             self.pre_recurse(node)
 627             try:
 628                 function_code = node.read('rU', None)
 629                 exec(compile(function_code, node.abspath(), 'exec'), self.exec_dict)
 630             finally:
 631                 self.post_recurse(node)
 632
 633 Build.BuildContext.PROCESS_SEPARATE_RULE = PROCESS_SEPARATE_RULE
 634 ConfigurationContext.PROCESS_SEPARATE_RULE = PROCESS_SEPARATE_RULE
 635
 636 def AD_DC_BUILD_IS_ENABLED(self):
 637     if self.CONFIG_SET('AD_DC_BUILD_IS_ENABLED'):
 638         return True
 639     return False
 640
 641 Build.BuildContext.AD_DC_BUILD_IS_ENABLED = AD_DC_BUILD_IS_ENABLED
 642
 643 @feature('cprogram', 'cshlib', 'cstaticlib')
 644 @after('apply_lib_vars')
 645 @before('apply_obj_vars')
 646 def samba_before_apply_obj_vars(self):
 647     """before apply_obj_vars for uselib, this removes the standard paths"""
 648
 649     def is_standard_libpath(env, path):
 650         for _path in env.STANDARD_LIBPATH:
 651             if _path == os.path.normpath(path):
 652                 return True
 653         return False
 654
 655     v = self.env
 656
 657     for i in v['RPATH']:
 658         if is_standard_libpath(v, i):
 659             v['RPATH'].remove(i)
 660
 661     for i in v['LIBPATH']:
 662         if is_standard_libpath(v, i):
 663             v['LIBPATH'].remove(i)
 664
 665 def samba_add_onoff_option(opt, option, help=(), dest=None, default=True,
 666                            with_name="with", without_name="without"):
 667     if default is None:
 668         default_str = "auto"
 669     elif default is True:
 670         default_str = "yes"
 671     elif default is False:
 672         default_str = "no"
 673     else:
 674         default_str = str(default)
 675
 676     if help == ():
 677         help = ("Build with %s support (default=%s)" % (option, default_str))
 678     if dest is None:
 679         dest = "with_%s" % option.replace('-', '_')
 680
 681     with_val = "--%s-%s" % (with_name, option)
 682     without_val = "--%s-%s" % (without_name, option)
 683
 684     opt.add_option(with_val, help=help, action="store_true", dest=dest,
 685                    default=default)
 686     opt.add_option(without_val, help=SUPPRESS_HELP, action="store_false",
 687                    dest=dest)
 688 Options.OptionsContext.samba_add_onoff_option = samba_add_onoff_option