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