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