buildtools/wafsamba: use top for waf 2.0
[samba.git] / 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_cc')
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 iŃ• 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.CHECK_MAKEFLAGS()
602     bld.SETUP_BUILD_GROUPS()
603     bld.ENFORCE_GROUP_ORDERING()
604     bld.CHECK_PROJECT_RULES()