buildtools/wafsamba/wscript

   1 #!/usr/bin/env python
   2
   3 # this is a base set of waf rules that everything else pulls in first
   4
   5 import os, sys
   6 from waflib import Configure, Logs, Options, Utils, Context, Errors
   7 import wafsamba
   8 from samba_utils import os_path_relpath
   9 from optparse import SUPPRESS_HELP
  10
  11 # this forces configure to be re-run if any of the configure
  12 # sections of the build scripts change. We have to check
  13 # for this in sys.argv as options have not yet been parsed when
  14 # we need to set this. This is off by default until some issues
  15 # are resolved related to WAFCACHE. It will need a lot of testing
  16 # before it is enabled by default.
  17 if '--enable-auto-reconfigure' in sys.argv:
  18     Configure.autoconfig = 'clobber'
  19
  20 def default_value(option, default=''):
  21     if option in Options.options.__dict__:
  22         return Options.options.__dict__[option]
  23     return default
  24
  25 def options(opt):
  26     opt.load('compiler_cc')
  27
  28     opt.load('gnu_dirs')
  29
  30     gr = opt.option_group('library handling options')
  31
  32     gr.add_option('--bundled-libraries',
  33                    help=("comma separated list of bundled libraries. May include !LIBNAME to disable bundling a library. Can be 'NONE' or 'ALL' [auto]"),
  34                    action="store", dest='BUNDLED_LIBS', default='')
  35
  36     gr.add_option('--private-libraries',
  37                    help=("comma separated list of normally public libraries to build instead as private libraries. May include !LIBNAME to disable making a library private. Can be 'NONE' or 'ALL' [auto]"),
  38                    action="store", dest='PRIVATE_LIBS', default='')
  39
  40     extension_default = default_value('PRIVATE_EXTENSION_DEFAULT')
  41     gr.add_option('--private-library-extension',
  42                    help=("name extension for private libraries [%s]" % extension_default),
  43                    action="store", dest='PRIVATE_EXTENSION', default=extension_default)
  44
  45     extension_exception = default_value('PRIVATE_EXTENSION_EXCEPTION')
  46     gr.add_option('--private-extension-exception',
  47                    help=("comma separated list of libraries to not apply extension to [%s]" % extension_exception),
  48                    action="store", dest='PRIVATE_EXTENSION_EXCEPTION', default=extension_exception)
  49
  50     builtin_default = default_value('BUILTIN_LIBRARIES_DEFAULT')
  51     gr.add_option('--builtin-libraries',
  52                    help=("command separated list of libraries to build directly into binaries [%s]" % builtin_default),
  53                    action="store", dest='BUILTIN_LIBRARIES', default=builtin_default)
  54
  55     gr.add_option('--minimum-library-version',
  56                    help=("list of minimum system library versions (LIBNAME1:version,LIBNAME2:version)"),
  57                    action="store", dest='MINIMUM_LIBRARY_VERSION', default='')
  58
  59     gr.add_option('--disable-rpath',
  60                    help=("Disable use of rpath for build binaries"),
  61                    action="store_true", dest='disable_rpath_build', default=False)
  62     gr.add_option('--disable-rpath-install',
  63                    help=("Disable use of rpath for library path in installed files"),
  64                    action="store_true", dest='disable_rpath_install', default=False)
  65     gr.add_option('--disable-rpath-private-install',
  66                    help=("Disable use of rpath for private library path in installed files"),
  67                    action="store_true", dest='disable_rpath_private_install', default=False)
  68     gr.add_option('--nonshared-binary',
  69                    help=("Disable use of shared libs for the listed binaries"),
  70                    action="store", dest='NONSHARED_BINARIES', default='')
  71     gr.add_option('--disable-symbol-versions',
  72                    help=("Disable use of the --version-script linker option"),
  73                    action="store_true", dest='disable_symbol_versions', default=False)
  74
  75     opt.add_option('--with-modulesdir',
  76                    help=("modules directory [PREFIX/modules]"),
  77                    action="store", dest='MODULESDIR', default='${PREFIX}/modules')
  78
  79     opt.add_option('--with-privatelibdir',
  80                    help=("private library directory [PREFIX/lib/%s]" % Context.g_module.APPNAME),
  81                    action="store", dest='PRIVATELIBDIR', default=None)
  82
  83     opt.add_option('--with-libiconv',
  84                    help='additional directory to search for libiconv',
  85                    action='store', dest='iconv_open', default='/usr/local',
  86                    match = ['Checking for library iconv', 'Checking for iconv_open', 'Checking for header iconv.h'])
  87     opt.add_option('--without-gettext',
  88                    help=("Disable use of gettext"),
  89                    action="store_true", dest='disable_gettext', default=False)
  90
  91     gr = opt.option_group('developer options')
  92
  93     gr.add_option('-C',
  94                    help='enable configure cacheing',
  95                    action='store_true', dest='enable_configure_cache')
  96     gr.add_option('--enable-auto-reconfigure',
  97                    help='enable automatic reconfigure on build',
  98                    action='store_true', dest='enable_auto_reconfigure')
  99     gr.add_option('--enable-debug',
 100                    help=("Turn on debugging symbols"),
 101                    action="store_true", dest='debug', default=False)
 102     gr.add_option('--enable-developer',
 103                    help=("Turn on developer warnings and debugging"),
 104                    action="store_true", dest='developer', default=False)
 105     def picky_developer_callback(option, opt_str, value, parser):
 106         parser.values.developer = True
 107         parser.values.picky_developer = True
 108     gr.add_option('--picky-developer',
 109                    help=("Treat all warnings as errors (enable -Werror)"),
 110                    action="callback", callback=picky_developer_callback,
 111                    dest='picky_developer', default=False)
 112     gr.add_option('--fatal-errors',
 113                    help=("Stop compilation on first error (enable -Wfatal-errors)"),
 114                    action="store_true", dest='fatal_errors', default=False)
 115     gr.add_option('--enable-gccdeps',
 116                    help=("Enable use of gcc -MD dependency module"),
 117                    action="store_true", dest='enable_gccdeps', default=True)
 118     gr.add_option('--timestamp-dependencies',
 119                    help=("use file timestamps instead of content for build dependencies (BROKEN)"),
 120                    action="store_true", dest='timestamp_dependencies', default=False)
 121     gr.add_option('--pedantic',
 122                    help=("Enable even more compiler warnings"),
 123                    action='store_true', dest='pedantic', default=False)
 124     gr.add_option('--git-local-changes',
 125                    help=("mark version with + if local git changes"),
 126                    action='store_true', dest='GIT_LOCAL_CHANGES', default=False)
 127     gr.add_option('--address-sanitizer',
 128                    help=("Enable address sanitizer compile and linker flags"),
 129                    action="store_true", dest='address_sanitizer', default=False)
 130
 131     gr.add_option('--abi-check',
 132                    help=("Check ABI signatures for libraries"),
 133                    action='store_true', dest='ABI_CHECK', default=False)
 134     gr.add_option('--abi-check-disable',
 135                    help=("Disable ABI checking (used with --enable-developer)"),
 136                    action='store_true', dest='ABI_CHECK_DISABLE', default=False)
 137     gr.add_option('--abi-update',
 138                    help=("Update ABI signature files for libraries"),
 139                    action='store_true', dest='ABI_UPDATE', default=False)
 140
 141     gr.add_option('--show-deps',
 142                    help=("Show dependency tree for the given target"),
 143                    dest='SHOWDEPS', default='')
 144
 145     gr.add_option('--symbol-check',
 146                   help=("check symbols in object files against project rules"),
 147                   action='store_true', dest='SYMBOLCHECK', default=False)
 148
 149     gr.add_option('--dup-symbol-check',
 150                   help=("check for duplicate symbols in object files and system libs (must be configured with --enable-developer)"),
 151                   action='store_true', dest='DUP_SYMBOLCHECK', default=False)
 152
 153     gr.add_option('--why-needed',
 154                   help=("TARGET:DEPENDENCY check why TARGET needs DEPENDENCY"),
 155                   action='store', type='str', dest='WHYNEEDED', default=None)
 156
 157     gr.add_option('--show-duplicates',
 158                   help=("Show objects which are included in multiple binaries or libraries"),
 159                   action='store_true', dest='SHOW_DUPLICATES', default=False)
 160
 161     gr = opt.add_option_group('cross compilation options')
 162
 163     gr.add_option('--cross-compile',
 164                    help=("configure for cross-compilation"),
 165                    action='store_true', dest='CROSS_COMPILE', default=False)
 166     gr.add_option('--cross-execute',
 167                    help=("command prefix to use for cross-execution in configure"),
 168                    action='store', dest='CROSS_EXECUTE', default='')
 169     gr.add_option('--cross-answers',
 170                    help=("answers to cross-compilation configuration (auto modified)"),
 171                    action='store', dest='CROSS_ANSWERS', default='')
 172     gr.add_option('--hostcc',
 173                    help=("set host compiler when cross compiling"),
 174                    action='store', dest='HOSTCC', default=False)
 175
 176     # we use SUPPRESS_HELP for these, as they are ignored, and are there only
 177     # to allow existing RPM spec files to work
 178     opt.add_option('--build',
 179                    help=SUPPRESS_HELP,
 180                    action='store', dest='AUTOCONF_BUILD', default='')
 181     opt.add_option('--host',
 182                    help=SUPPRESS_HELP,
 183                    action='store', dest='AUTOCONF_HOST', default='')
 184     opt.add_option('--target',
 185                    help=SUPPRESS_HELP,
 186                    action='store', dest='AUTOCONF_TARGET', default='')
 187     opt.add_option('--program-prefix',
 188                    help=SUPPRESS_HELP,
 189                    action='store', dest='AUTOCONF_PROGRAM_PREFIX', default='')
 190     opt.add_option('--disable-dependency-tracking',
 191                    help=SUPPRESS_HELP,
 192                    action='store_true', dest='AUTOCONF_DISABLE_DEPENDENCY_TRACKING', default=False)
 193     opt.add_option('--disable-silent-rules',
 194                    help=SUPPRESS_HELP,
 195                    action='store_true', dest='AUTOCONF_DISABLE_SILENT_RULES', default=False)
 196
 197     gr = opt.option_group('dist options')
 198     gr.add_option('--sign-release',
 199                    help='sign the release tarball created by waf dist',
 200                    action='store_true', dest='SIGN_RELEASE')
 201     gr.add_option('--tag',
 202                    help='tag release in git at the same time',
 203                    type='string', action='store', dest='TAG_RELEASE')
 204
 205     opt.add_option('--disable-python',
 206                     help='do not generate python modules',
 207                     action='store_true', dest='disable_python', default=False)
 208
 209     opt.add_option('--extra-python', type=str,
 210                     help=("build selected libraries for the specified "
 211                           "additional version of Python "
 212                           "(example: --extra-python=/usr/bin/python3)"),
 213                     metavar="PYTHON", dest='EXTRA_PYTHON', default=None)
 214
 215
 216 @Utils.run_once
 217 def configure(conf):
 218     conf.env.hlist = []
 219     conf.env.srcdir = conf.srcnode.abspath()
 220
 221     conf.define('SRCDIR', conf.env['srcdir'])
 222
 223     if Options.options.timestamp_dependencies:
 224         conf.ENABLE_TIMESTAMP_DEPENDENCIES()
 225
 226     conf.SETUP_CONFIGURE_CACHE(Options.options.enable_configure_cache)
 227
 228     # load our local waf extensions
 229     conf.load('gnu_dirs')
 230     conf.load('wafsamba')
 231
 232     conf.CHECK_CC_ENV()
 233
 234     conf.load('compiler_c')
 235
 236     conf.CHECK_STANDARD_LIBPATH()
 237
 238     # we need git for 'waf dist'
 239     conf.find_program('git', var='GIT')
 240
 241     # older gcc versions (< 4.4) does not work with gccdeps, so we have to see if the .d file is generated
 242     if Options.options.enable_gccdeps:
 243         # stale file removal - the configuration may pick up the old .pyc file
 244         p = os.path.join(conf.env.srcdir, 'buildtools/wafsamba/gccdeps.pyc')
 245         if os.path.exists(p):
 246             os.remove(p)
 247         conf.load('gccdeps')
 248
 249     # make the install paths available in environment
 250     conf.env.LIBDIR = Options.options.LIBDIR or '${PREFIX}/lib'
 251     conf.env.BINDIR = Options.options.BINDIR or '${PREFIX}/bin'
 252     conf.env.SBINDIR = Options.options.SBINDIR or '${PREFIX}/sbin'
 253     conf.env.MODULESDIR = Options.options.MODULESDIR
 254     conf.env.PRIVATELIBDIR = Options.options.PRIVATELIBDIR
 255     conf.env.BUNDLED_LIBS = Options.options.BUNDLED_LIBS.split(',')
 256     conf.env.SYSTEM_LIBS = ()
 257     conf.env.PRIVATE_LIBS = Options.options.PRIVATE_LIBS.split(',')
 258     conf.env.BUILTIN_LIBRARIES = Options.options.BUILTIN_LIBRARIES.split(',')
 259     conf.env.NONSHARED_BINARIES = Options.options.NONSHARED_BINARIES.split(',')
 260
 261     conf.env.PRIVATE_EXTENSION = Options.options.PRIVATE_EXTENSION
 262     conf.env.PRIVATE_EXTENSION_EXCEPTION = Options.options.PRIVATE_EXTENSION_EXCEPTION.split(',')
 263
 264     conf.env.CROSS_COMPILE = Options.options.CROSS_COMPILE
 265     conf.env.CROSS_EXECUTE = Options.options.CROSS_EXECUTE
 266     conf.env.CROSS_ANSWERS = Options.options.CROSS_ANSWERS
 267     conf.env.HOSTCC        = Options.options.HOSTCC
 268
 269     conf.env.AUTOCONF_BUILD = Options.options.AUTOCONF_BUILD
 270     conf.env.AUTOCONF_HOST  = Options.options.AUTOCONF_HOST
 271     conf.env.AUTOCONF_PROGRAM_PREFIX = Options.options.AUTOCONF_PROGRAM_PREFIX
 272
 273     conf.env.disable_python = Options.options.disable_python
 274
 275     conf.env.EXTRA_PYTHON = Options.options.EXTRA_PYTHON
 276
 277     if (conf.env.disable_python and conf.env.EXTRA_PYTHON):
 278         Logs.error('ERROR: cannot specify both --disable-python and --extra-python.')
 279         sys.exit(1)
 280
 281     if (conf.env.AUTOCONF_HOST and
 282         conf.env.AUTOCONF_BUILD and
 283         conf.env.AUTOCONF_BUILD != conf.env.AUTOCONF_HOST):
 284         Logs.error('ERROR: Mismatch between --build and --host. Please use --cross-compile instead')
 285         sys.exit(1)
 286     if conf.env.AUTOCONF_PROGRAM_PREFIX:
 287         Logs.error('ERROR: --program-prefix not supported')
 288         sys.exit(1)
 289
 290     # enable ABI checking for developers
 291     conf.env.ABI_CHECK = Options.options.ABI_CHECK or Options.options.developer
 292     if Options.options.ABI_CHECK_DISABLE:
 293         conf.env.ABI_CHECK = False
 294     try:
 295         conf.find_program('gdb', mandatory=True)
 296     except:
 297         conf.env.ABI_CHECK = False
 298
 299     conf.env.GIT_LOCAL_CHANGES = Options.options.GIT_LOCAL_CHANGES
 300
 301     conf.CHECK_UNAME()
 302
 303     # see if we can compile and run a simple C program
 304     conf.CHECK_CODE('printf("hello world")',
 305                     define='HAVE_SIMPLE_C_PROG',
 306                     mandatory=True,
 307                     execute=True,
 308                     headers='stdio.h',
 309                     msg='Checking simple C program')
 310
 311     # Try to find the right extra flags for -Werror behaviour
 312     for f in ["-Werror",       # GCC
 313               "-errwarn=%all", # Sun Studio
 314               "-qhalt=w",     # IBM xlc
 315               "-w2",           # Tru64
 316              ]:
 317         if conf.CHECK_CFLAGS([f], '''
 318 '''):
 319             if not 'WERROR_CFLAGS' in conf.env:
 320                 conf.env['WERROR_CFLAGS'] = []
 321             conf.env['WERROR_CFLAGS'].extend([f])
 322             break
 323
 324     # check which compiler/linker flags are needed for rpath support
 325     if not conf.CHECK_LDFLAGS(['-Wl,-rpath,.']) and conf.CHECK_LDFLAGS(['-Wl,-R,.']):
 326         conf.env['RPATH_ST'] = '-Wl,-R,%s'
 327
 328     # check for rpath
 329     if conf.CHECK_LIBRARY_SUPPORT(rpath=True):
 330         support_rpath = True
 331         conf.env.RPATH_ON_BUILD   = not Options.options.disable_rpath_build
 332         conf.env.RPATH_ON_INSTALL = (conf.env.RPATH_ON_BUILD and
 333                                      not Options.options.disable_rpath_install)
 334         if not conf.env.PRIVATELIBDIR:
 335             conf.env.PRIVATELIBDIR = '%s/%s' % (conf.env.LIBDIR, Context.g_module.APPNAME)
 336         conf.env.RPATH_ON_INSTALL_PRIVATE = (
 337             not Options.options.disable_rpath_private_install)
 338     else:
 339         support_rpath = False
 340         conf.env.RPATH_ON_INSTALL = False
 341         conf.env.RPATH_ON_BUILD   = False
 342         conf.env.RPATH_ON_INSTALL_PRIVATE = False
 343         if not conf.env.PRIVATELIBDIR:
 344             # rpath is not possible so there is no sense in having a
 345             # private library directory by default.
 346             # the user can of course always override it.
 347             conf.env.PRIVATELIBDIR = conf.env.LIBDIR
 348
 349     if (not Options.options.disable_symbol_versions and
 350         conf.CHECK_LIBRARY_SUPPORT(rpath=support_rpath,
 351                                    version_script=True,
 352                                    msg='-Wl,--version-script support')):
 353         conf.env.HAVE_LD_VERSION_SCRIPT = True
 354     else:
 355         conf.env.HAVE_LD_VERSION_SCRIPT = False
 356
 357     if conf.CHECK_CFLAGS(['-fvisibility=hidden'] + conf.env.WERROR_CFLAGS):
 358         conf.env.VISIBILITY_CFLAGS = '-fvisibility=hidden'
 359         conf.CHECK_CODE('''int main(void) { return 0; }
 360                            __attribute__((visibility("default"))) void vis_foo2(void) {}''',
 361                         cflags=conf.env.VISIBILITY_CFLAGS,
 362                         strict=True,
 363                         define='HAVE_VISIBILITY_ATTR', addmain=False)
 364
 365     # check HAVE_CONSTRUCTOR_ATTRIBUTE
 366     conf.CHECK_CODE('''
 367             void test_constructor_attribute(void) __attribute__ ((constructor));
 368
 369             void test_constructor_attribute(void)
 370             {
 371                 return;
 372             }
 373
 374             int main(void) {
 375                 return 0;
 376             }
 377             ''',
 378             'HAVE_CONSTRUCTOR_ATTRIBUTE',
 379             addmain=False,
 380             strict=True,
 381             msg='Checking for library constructor support')
 382
 383         # check HAVE_DESTRUCTOR_ATTRIBUTE
 384     conf.CHECK_CODE('''
 385             void test_destructor_attribute(void) __attribute__ ((destructor));
 386
 387             void test_destructor_attribute(void)
 388             {
 389                 return;
 390             }
 391
 392             int main(void) {
 393                 return 0;
 394             }
 395             ''',
 396             'HAVE_DESTRUCTOR_ATTRIBUTE',
 397             addmain=False,
 398             strict=True,
 399             msg='Checking for library destructor support')
 400
 401     conf.CHECK_CODE('''
 402             void test_attribute(void) __attribute__ (());
 403
 404             void test_attribute(void)
 405             {
 406                 return;
 407             }
 408
 409             int main(void) {
 410                 return 0;
 411             }
 412             ''',
 413             'HAVE___ATTRIBUTE__',
 414             addmain=False,
 415             strict=True,
 416             msg='Checking for __attribute__')
 417
 418     if sys.platform.startswith('aix'):
 419         conf.DEFINE('_ALL_SOURCE', 1, add_to_cflags=True)
 420         # Might not be needed if ALL_SOURCE is defined
 421         # conf.DEFINE('_XOPEN_SOURCE', 600, add_to_cflags=True)
 422
 423     # we should use the PIC options in waf instead
 424     # Some compilo didn't support -fPIC but just print a warning
 425     if conf.env['COMPILER_CC'] == "suncc":
 426         conf.ADD_CFLAGS('-KPIC', testflags=True)
 427         # we really want define here as we need to have this
 428         # define even during the tests otherwise detection of
 429         # boolean is broken
 430         conf.DEFINE('_STDC_C99', 1, add_to_cflags=True)
 431         conf.DEFINE('_XPG6', 1, add_to_cflags=True)
 432     else:
 433         conf.ADD_CFLAGS('-fPIC', testflags=True)
 434
 435     # On Solaris 8 with suncc (at least) the flags for the linker to define the name of the
 436     # library are not always working (if the command line is very very long and with a lot
 437     # files)
 438
 439     if conf.env['COMPILER_CC'] == "suncc":
 440         save = conf.env['SONAME_ST']
 441         conf.env['SONAME_ST'] = '-Wl,-h,%s'
 442         if not conf.CHECK_SHLIB_INTRASINC_NAME_FLAGS("Checking if flags %s are ok" % conf.env['SONAME_ST']):
 443             conf.env['SONAME_ST'] = save
 444
 445     conf.CHECK_INLINE()
 446
 447     # check for pkgconfig
 448     conf.CHECK_CFG(atleast_pkgconfig_version='0.0.0')
 449
 450     conf.DEFINE('_GNU_SOURCE', 1, add_to_cflags=True)
 451     conf.DEFINE('_XOPEN_SOURCE_EXTENDED', 1, add_to_cflags=True)
 452
 453     # on Tru64 certain features are only available with _OSF_SOURCE set to 1
 454     # and _XOPEN_SOURCE set to 600
 455     if conf.env['SYSTEM_UNAME_SYSNAME'] == 'OSF1':
 456         conf.DEFINE('_OSF_SOURCE', 1, add_to_cflags=True)
 457         conf.DEFINE('_XOPEN_SOURCE', 600, add_to_cflags=True)
 458
 459     # SCM_RIGHTS is only avail if _XOPEN_SOURCE iѕ defined on IRIX
 460     if conf.env['SYSTEM_UNAME_SYSNAME'] == 'IRIX':
 461         conf.DEFINE('_XOPEN_SOURCE', 600, add_to_cflags=True)
 462         conf.DEFINE('_BSD_TYPES', 1, add_to_cflags=True)
 463
 464     # Try to find the right extra flags for C99 initialisers
 465     for f in ["", "-AC99", "-qlanglvl=extc99", "-qlanglvl=stdc99", "-c99"]:
 466         if conf.CHECK_CFLAGS([f], '''
 467 struct foo {int x;char y;};
 468 struct foo bar = { .y = 'X', .x = 1 };
 469 '''):
 470             if f != "":
 471                 conf.ADD_CFLAGS(f)
 472             break
 473
 474     # get the base headers we'll use for the rest of the tests
 475     conf.CHECK_HEADERS('stdio.h sys/types.h sys/stat.h stdlib.h stddef.h memory.h string.h',
 476                        add_headers=True)
 477     conf.CHECK_HEADERS('strings.h inttypes.h stdint.h unistd.h minix/config.h', add_headers=True)
 478     conf.CHECK_HEADERS('ctype.h', add_headers=True)
 479
 480     if sys.platform != 'darwin':
 481         conf.CHECK_HEADERS('standards.h', add_headers=True)
 482
 483     conf.CHECK_HEADERS('stdbool.h stdint.h stdarg.h vararg.h', add_headers=True)
 484     conf.CHECK_HEADERS('limits.h assert.h')
 485
 486     # see if we need special largefile flags
 487     if not conf.CHECK_LARGEFILE():
 488         raise Errors.WafError('Samba requires large file support support, but not available on this platform: sizeof(off_t) < 8')
 489
 490     if conf.env.HAVE_STDDEF_H and conf.env.HAVE_STDLIB_H:
 491         conf.DEFINE('STDC_HEADERS', 1)
 492
 493     conf.CHECK_HEADERS('sys/time.h time.h', together=True)
 494
 495     if conf.env.HAVE_SYS_TIME_H and conf.env.HAVE_TIME_H:
 496         conf.DEFINE('TIME_WITH_SYS_TIME', 1)
 497
 498     # cope with different extensions for libraries
 499     (root, ext) = os.path.splitext(conf.env.cshlib_PATTERN)
 500     if ext[0] == '.':
 501         conf.define('SHLIBEXT', ext[1:], quote=True)
 502     else:
 503         conf.define('SHLIBEXT', "so", quote=True)
 504
 505     # First try a header check for cross-compile friendlyness
 506     conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
 507                         #define B __BYTE_ORDER
 508                         #elif defined(BYTE_ORDER)
 509                         #define B BYTE_ORDER
 510                         #endif
 511
 512                         #ifdef __LITTLE_ENDIAN
 513                         #define LITTLE __LITTLE_ENDIAN
 514                         #elif defined(LITTLE_ENDIAN)
 515                         #define LITTLE LITTLE_ENDIAN
 516                         #endif
 517
 518                         #if !defined(LITTLE) || !defined(B) || LITTLE != B
 519                         #error Not little endian.
 520                         #endif
 521                         int main(void) { return 0; }""",
 522                             addmain=False,
 523                             headers="endian.h sys/endian.h",
 524                             define="HAVE_LITTLE_ENDIAN")
 525     conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
 526                         #define B __BYTE_ORDER
 527                         #elif defined(BYTE_ORDER)
 528                         #define B BYTE_ORDER
 529                         #endif
 530
 531                         #ifdef __BIG_ENDIAN
 532                         #define BIG __BIG_ENDIAN
 533                         #elif defined(BIG_ENDIAN)
 534                         #define BIG BIG_ENDIAN
 535                         #endif
 536
 537                         #if !defined(BIG) || !defined(B) || BIG != B
 538                         #error Not big endian.
 539                         #endif
 540                         int main(void) { return 0; }""",
 541                             addmain=False,
 542                             headers="endian.h sys/endian.h",
 543                             define="HAVE_BIG_ENDIAN")
 544
 545     if not conf.CONFIG_SET("HAVE_BIG_ENDIAN") and not conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
 546         # That didn't work!  Do runtime test.
 547         conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
 548             u.i = 0x01020304;
 549             return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;""",
 550                           addmain=True, execute=True,
 551                           define='HAVE_LITTLE_ENDIAN',
 552                           msg="Checking for HAVE_LITTLE_ENDIAN - runtime")
 553         conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
 554             u.i = 0x01020304;
 555             return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;""",
 556                           addmain=True, execute=True,
 557                           define='HAVE_BIG_ENDIAN',
 558                           msg="Checking for HAVE_BIG_ENDIAN - runtime")
 559
 560     # Extra sanity check.
 561     if conf.CONFIG_SET("HAVE_BIG_ENDIAN") == conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
 562         Logs.error("Failed endian determination.  The PDP-11 is back?")
 563         sys.exit(1)
 564     else:
 565         if conf.CONFIG_SET("HAVE_BIG_ENDIAN"):
 566             conf.DEFINE('WORDS_BIGENDIAN', 1)
 567
 568     # check if signal() takes a void function
 569     if conf.CHECK_CODE('return *(signal (0, 0)) (0) == 1',
 570                        define='RETSIGTYPE_INT',
 571                        execute=False,
 572                        headers='signal.h',
 573                        msg='Checking if signal handlers return int'):
 574         conf.DEFINE('RETSIGTYPE', 'int')
 575     else:
 576         conf.DEFINE('RETSIGTYPE', 'void')
 577
 578     conf.CHECK_VARIABLE('__FUNCTION__', define='HAVE_FUNCTION_MACRO')
 579
 580     conf.CHECK_CODE('va_list ap1,ap2; va_copy(ap1,ap2)',
 581                     define="HAVE_VA_COPY",
 582                     msg="Checking for va_copy")
 583
 584     conf.CHECK_CODE('''
 585                     #define eprintf(...) fprintf(stderr, __VA_ARGS__)
 586                     eprintf("bla", "bar")
 587                     ''', define='HAVE__VA_ARGS__MACRO')
 588
 589     conf.SAMBA_BUILD_ENV()
 590
 591
 592 def build(bld):
 593     # give a more useful message if the source directory has moved
 594     curdir = bld.path.abspath()
 595     srcdir = bld.srcnode.abspath()
 596     relpath = os_path_relpath(curdir, srcdir)
 597     if relpath.find('../') != -1:
 598         Logs.error('bld.path %s is not a child of %s' % (curdir, srcdir))
 599         raise Errors.WafError('''The top source directory has moved. Please run distclean and reconfigure''')
 600
 601     bld.SETUP_BUILD_GROUPS()
 602     bld.ENFORCE_GROUP_ORDERING()
 603     bld.CHECK_PROJECT_RULES()