430d164b60d71318cfe47cdee8b6348f359d55b3
[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 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('--disable-python',
200                     help='do not generate python modules',
201                     action='store_true', dest='disable_python', default=False)
202
203     opt.add_option('--extra-python', type=str,
204                     help=("build selected libraries for the specified "
205                           "additional version of Python "
206                           "(example: --extra-python=/usr/bin/python3)"),
207                     metavar="PYTHON", dest='EXTRA_PYTHON', default=None)
208
209
210 @Utils.run_once
211 def configure(conf):
212     conf.env.hlist = []
213     conf.env.srcdir = conf.srcdir
214
215     conf.define('SRCDIR', conf.env['srcdir'])
216
217     if Options.options.timestamp_dependencies:
218         conf.ENABLE_TIMESTAMP_DEPENDENCIES()
219
220     conf.SETUP_CONFIGURE_CACHE(Options.options.enable_configure_cache)
221
222     # load our local waf extensions
223     conf.check_tool('gnu_dirs')
224     conf.check_tool('wafsamba')
225     conf.check_tool('print_commands')
226
227     conf.CHECK_CC_ENV()
228
229     conf.check_tool('compiler_cc')
230
231     conf.CHECK_STANDARD_LIBPATH()
232
233     # we need git for 'waf dist'
234     conf.find_program('git', var='GIT')
235
236     # older gcc versions (< 4.4) does not work with gccdeps, so we have to see if the .d file is generated
237     if Options.options.enable_gccdeps:
238         # stale file removal - the configuration may pick up the old .pyc file
239         p = os.path.join(conf.srcdir, 'buildtools/wafsamba/gccdeps.pyc')
240         if os.path.exists(p):
241             os.remove(p)
242
243         from TaskGen import feature, after
244         @feature('testd')
245         @after('apply_core')
246         def check_d(self):
247             tsk = self.compiled_tasks[0]
248             tsk.outputs.append(tsk.outputs[0].change_ext('.d'))
249
250         import Task
251         cc = Task.TaskBase.classes['cc']
252         oldmeth = cc.run
253
254         cc.run = Task.compile_fun_noshell('cc', '${CC} ${CCFLAGS} ${CPPFLAGS} ${_CCINCFLAGS} ${_CCDEFFLAGS} ${CC_SRC_F}${SRC} ${CC_TGT_F}${TGT[0].abspath(env)}')[0]
255         try:
256             try:
257                 conf.check(features='c testd', fragment='int main() {return 0;}\n', ccflags=['-MD'], mandatory=True, msg='Check for -MD')
258             except:
259                 pass
260             else:
261                 conf.check_tool('gccdeps', tooldir=conf.srcdir + "/buildtools/wafsamba")
262         finally:
263             cc.run = oldmeth
264
265     # make the install paths available in environment
266     conf.env.LIBDIR = Options.options.LIBDIR or '${PREFIX}/lib'
267     conf.env.BINDIR = Options.options.BINDIR or '${PREFIX}/bin'
268     conf.env.SBINDIR = Options.options.SBINDIR or '${PREFIX}/sbin'
269     conf.env.MODULESDIR = Options.options.MODULESDIR
270     conf.env.PRIVATELIBDIR = Options.options.PRIVATELIBDIR
271     conf.env.BUNDLED_LIBS = Options.options.BUNDLED_LIBS.split(',')
272     conf.env.PRIVATE_LIBS = Options.options.PRIVATE_LIBS.split(',')
273     conf.env.BUILTIN_LIBRARIES = Options.options.BUILTIN_LIBRARIES.split(',')
274     conf.env.NONSHARED_BINARIES = Options.options.NONSHARED_BINARIES.split(',')
275
276     conf.env.PRIVATE_EXTENSION = Options.options.PRIVATE_EXTENSION
277     conf.env.PRIVATE_EXTENSION_EXCEPTION = Options.options.PRIVATE_EXTENSION_EXCEPTION.split(',')
278
279     conf.env.CROSS_COMPILE = Options.options.CROSS_COMPILE
280     conf.env.CROSS_EXECUTE = Options.options.CROSS_EXECUTE
281     conf.env.CROSS_ANSWERS = Options.options.CROSS_ANSWERS
282     conf.env.HOSTCC        = Options.options.HOSTCC
283
284     conf.env.AUTOCONF_BUILD = Options.options.AUTOCONF_BUILD
285     conf.env.AUTOCONF_HOST  = Options.options.AUTOCONF_HOST
286     conf.env.AUTOCONF_PROGRAM_PREFIX = Options.options.AUTOCONF_PROGRAM_PREFIX
287
288     conf.env.disable_python = Options.options.disable_python
289
290     conf.env.EXTRA_PYTHON = Options.options.EXTRA_PYTHON
291
292     if (conf.env.disable_python and conf.env.EXTRA_PYTHON):
293         Logs.error('ERROR: cannot specify both --disable-python and --extra-python.')
294         sys.exit(1)
295
296     if (conf.env.AUTOCONF_HOST and
297         conf.env.AUTOCONF_BUILD and
298         conf.env.AUTOCONF_BUILD != conf.env.AUTOCONF_HOST):
299         Logs.error('ERROR: Mismatch between --build and --host. Please use --cross-compile instead')
300         sys.exit(1)
301     if conf.env.AUTOCONF_PROGRAM_PREFIX:
302         Logs.error('ERROR: --program-prefix not supported')
303         sys.exit(1)
304
305     # enable ABI checking for developers
306     conf.env.ABI_CHECK = Options.options.ABI_CHECK or Options.options.developer
307     if Options.options.ABI_CHECK_DISABLE:
308         conf.env.ABI_CHECK = False
309     try:
310         conf.find_program('gdb', mandatory=True)
311     except:
312         conf.env.ABI_CHECK = False
313
314     conf.env.GIT_LOCAL_CHANGES = Options.options.GIT_LOCAL_CHANGES
315
316     conf.CHECK_COMMAND(['uname', '-a'],
317                        msg='Checking build system',
318                        define='BUILD_SYSTEM',
319                        on_target=False)
320     conf.CHECK_UNAME()
321
322     # see if we can compile and run a simple C program
323     conf.CHECK_CODE('printf("hello world")',
324                     define='HAVE_SIMPLE_C_PROG',
325                     mandatory=True,
326                     execute=True,
327                     headers='stdio.h',
328                     msg='Checking simple C program')
329
330     # Try to find the right extra flags for -Werror behaviour
331     for f in ["-Werror",       # GCC
332               "-errwarn=%all", # Sun Studio
333               "-qhalt=w",     # IBM xlc
334               "-w2",           # Tru64
335              ]:
336         if conf.CHECK_CFLAGS([f], '''
337 '''):
338             if not 'WERROR_CFLAGS' in conf.env:
339                 conf.env['WERROR_CFLAGS'] = []
340             conf.env['WERROR_CFLAGS'].extend([f])
341             break
342
343     # check which compiler/linker flags are needed for rpath support
344     if not conf.CHECK_LDFLAGS(['-Wl,-rpath,.']) and conf.CHECK_LDFLAGS(['-Wl,-R,.']):
345         conf.env['RPATH_ST'] = '-Wl,-R,%s'
346
347     # check for rpath
348     if conf.CHECK_LIBRARY_SUPPORT(rpath=True):
349         support_rpath = True
350         conf.env.RPATH_ON_BUILD   = not Options.options.disable_rpath_build
351         conf.env.RPATH_ON_INSTALL = (conf.env.RPATH_ON_BUILD and
352                                      not Options.options.disable_rpath_install)
353         if not conf.env.PRIVATELIBDIR:
354             conf.env.PRIVATELIBDIR = '%s/%s' % (conf.env.LIBDIR, Utils.g_module.APPNAME)
355         conf.env.RPATH_ON_INSTALL_PRIVATE = (
356             not Options.options.disable_rpath_private_install)
357     else:
358         support_rpath = False
359         conf.env.RPATH_ON_INSTALL = False
360         conf.env.RPATH_ON_BUILD   = False
361         conf.env.RPATH_ON_INSTALL_PRIVATE = False
362         if not conf.env.PRIVATELIBDIR:
363             # rpath is not possible so there is no sense in having a
364             # private library directory by default.
365             # the user can of course always override it.
366             conf.env.PRIVATELIBDIR = conf.env.LIBDIR
367
368     if (not Options.options.disable_symbol_versions and
369         conf.CHECK_LIBRARY_SUPPORT(rpath=support_rpath,
370                                    version_script=True,
371                                    msg='-Wl,--version-script support')):
372         conf.env.HAVE_LD_VERSION_SCRIPT = True
373     else:
374         conf.env.HAVE_LD_VERSION_SCRIPT = False
375
376     if conf.CHECK_CFLAGS(['-fvisibility=hidden'] + conf.env.WERROR_CFLAGS):
377         conf.env.VISIBILITY_CFLAGS = '-fvisibility=hidden'
378         conf.CHECK_CODE('''int main(void) { return 0; }
379                            __attribute__((visibility("default"))) void vis_foo2(void) {}''',
380                         cflags=conf.env.VISIBILITY_CFLAGS,
381                         define='HAVE_VISIBILITY_ATTR', addmain=False)
382
383     # check HAVE_CONSTRUCTOR_ATTRIBUTE
384     conf.CHECK_CODE('''
385             void test_constructor_attribute(void) __attribute__ ((constructor));
386
387             void test_constructor_attribute(void)
388             {
389                 return;
390             }
391
392             int main(void) {
393                 return 0;
394             }
395             ''',
396             'HAVE_CONSTRUCTOR_ATTRIBUTE',
397             addmain=False,
398             msg='Checking for library constructor support')
399
400         # check HAVE_DESTRUCTOR_ATTRIBUTE
401     conf.CHECK_CODE('''
402             void test_destructor_attribute(void) __attribute__ ((destructor));
403
404             void test_destructor_attribute(void)
405             {
406                 return;
407             }
408
409             int main(void) {
410                 return 0;
411             }
412             ''',
413             'HAVE_DESTRUCTOR_ATTRIBUTE',
414             addmain=False,
415             msg='Checking for library destructor support')
416
417     conf.CHECK_CODE('''
418             void test_attribute(void) __attribute__ (());
419
420             void test_attribute(void)
421             {
422                 return;
423             }
424
425             int main(void) {
426                 return 0;
427             }
428             ''',
429             'HAVE___ATTRIBUTE__',
430             addmain=False,
431             msg='Checking for __attribute__')
432
433     if sys.platform.startswith('aix'):
434         conf.DEFINE('_ALL_SOURCE', 1, add_to_cflags=True)
435         # Might not be needed if ALL_SOURCE is defined
436         # conf.DEFINE('_XOPEN_SOURCE', 600, add_to_cflags=True)
437
438     # we should use the PIC options in waf instead
439     # Some compilo didn't support -fPIC but just print a warning
440     if conf.env['COMPILER_CC'] == "suncc":
441         conf.ADD_CFLAGS('-KPIC', testflags=True)
442         # we really want define here as we need to have this
443         # define even during the tests otherwise detection of
444         # boolean is broken
445         conf.DEFINE('_STDC_C99', 1, add_to_cflags=True)
446         conf.DEFINE('_XPG6', 1, add_to_cflags=True)
447     else:
448         conf.ADD_CFLAGS('-fPIC', testflags=True)
449
450     # On Solaris 8 with suncc (at least) the flags for the linker to define the name of the
451     # library are not always working (if the command line is very very long and with a lot
452     # files)
453
454     if conf.env['COMPILER_CC'] == "suncc":
455         save = conf.env['SONAME_ST']
456         conf.env['SONAME_ST'] = '-Wl,-h,%s'
457         if not conf.CHECK_SHLIB_INTRASINC_NAME_FLAGS("Checking if flags %s are ok" % conf.env['SONAME_ST']):
458             conf.env['SONAME_ST'] = save
459
460     conf.CHECK_INLINE()
461
462     # check for pkgconfig
463     conf.CHECK_CFG(atleast_pkgconfig_version='0.0.0')
464
465     conf.DEFINE('_GNU_SOURCE', 1, add_to_cflags=True)
466     conf.DEFINE('_XOPEN_SOURCE_EXTENDED', 1, add_to_cflags=True)
467
468     # on Tru64 certain features are only available with _OSF_SOURCE set to 1
469     # and _XOPEN_SOURCE set to 600
470     if conf.env['SYSTEM_UNAME_SYSNAME'] == 'OSF1':
471         conf.DEFINE('_OSF_SOURCE', 1, add_to_cflags=True)
472         conf.DEFINE('_XOPEN_SOURCE', 600, add_to_cflags=True)
473
474     # SCM_RIGHTS is only avail if _XOPEN_SOURCE iŃ• defined on IRIX
475     if conf.env['SYSTEM_UNAME_SYSNAME'] == 'IRIX':
476         conf.DEFINE('_XOPEN_SOURCE', 600, add_to_cflags=True)
477         conf.DEFINE('_BSD_TYPES', 1, add_to_cflags=True)
478
479     # Try to find the right extra flags for C99 initialisers
480     for f in ["", "-AC99", "-qlanglvl=extc99", "-qlanglvl=stdc99", "-c99"]:
481         if conf.CHECK_CFLAGS([f], '''
482 struct foo {int x;char y;};
483 struct foo bar = { .y = 'X', .x = 1 };
484 '''):
485             if f != "":
486                 conf.ADD_CFLAGS(f)
487             break
488
489     # get the base headers we'll use for the rest of the tests
490     conf.CHECK_HEADERS('stdio.h sys/types.h sys/stat.h stdlib.h stddef.h memory.h string.h',
491                        add_headers=True)
492     conf.CHECK_HEADERS('strings.h inttypes.h stdint.h unistd.h minix/config.h', add_headers=True)
493     conf.CHECK_HEADERS('ctype.h', add_headers=True)
494
495     if sys.platform != 'darwin':
496         conf.CHECK_HEADERS('standards.h', add_headers=True)
497
498     conf.CHECK_HEADERS('stdbool.h stdint.h stdarg.h vararg.h', add_headers=True)
499     conf.CHECK_HEADERS('limits.h assert.h')
500
501     # see if we need special largefile flags
502     if not conf.CHECK_LARGEFILE():
503         raise Utils.WafError('Samba requires large file support support, but not available on this platform: sizeof(off_t) < 8')
504
505     if conf.env.HAVE_STDDEF_H and conf.env.HAVE_STDLIB_H:
506         conf.DEFINE('STDC_HEADERS', 1)
507
508     conf.CHECK_HEADERS('sys/time.h time.h', together=True)
509
510     if conf.env.HAVE_SYS_TIME_H and conf.env.HAVE_TIME_H:
511         conf.DEFINE('TIME_WITH_SYS_TIME', 1)
512
513     # cope with different extensions for libraries
514     (root, ext) = os.path.splitext(conf.env.shlib_PATTERN)
515     if ext[0] == '.':
516         conf.define('SHLIBEXT', ext[1:], quote=True)
517     else:
518         conf.define('SHLIBEXT', "so", quote=True)
519
520     # First try a header check for cross-compile friendlyness
521     conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
522                         #define B __BYTE_ORDER
523                         #elif defined(BYTE_ORDER)
524                         #define B BYTE_ORDER
525                         #endif
526
527                         #ifdef __LITTLE_ENDIAN
528                         #define LITTLE __LITTLE_ENDIAN
529                         #elif defined(LITTLE_ENDIAN)
530                         #define LITTLE LITTLE_ENDIAN
531                         #endif
532
533                         #if !defined(LITTLE) || !defined(B) || LITTLE != B
534                         #error Not little endian.
535                         #endif
536                         int main(void) { return 0; }""",
537                             addmain=False,
538                             headers="endian.h sys/endian.h",
539                             define="HAVE_LITTLE_ENDIAN")
540     conf.CHECK_CODE(code = """#ifdef __BYTE_ORDER
541                         #define B __BYTE_ORDER
542                         #elif defined(BYTE_ORDER)
543                         #define B BYTE_ORDER
544                         #endif
545
546                         #ifdef __BIG_ENDIAN
547                         #define BIG __BIG_ENDIAN
548                         #elif defined(BIG_ENDIAN)
549                         #define BIG BIG_ENDIAN
550                         #endif
551
552                         #if !defined(BIG) || !defined(B) || BIG != B
553                         #error Not big endian.
554                         #endif
555                         int main(void) { return 0; }""",
556                             addmain=False,
557                             headers="endian.h sys/endian.h",
558                             define="HAVE_BIG_ENDIAN")
559
560     if not conf.CONFIG_SET("HAVE_BIG_ENDIAN") and not conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
561         # That didn't work!  Do runtime test.
562         conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
563             u.i = 0x01020304;
564             return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1;""",
565                           addmain=True, execute=True,
566                           define='HAVE_LITTLE_ENDIAN',
567                           msg="Checking for HAVE_LITTLE_ENDIAN - runtime")
568         conf.CHECK_CODE("""union { int i; char c[sizeof(int)]; } u;
569             u.i = 0x01020304;
570             return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1;""",
571                           addmain=True, execute=True,
572                           define='HAVE_BIG_ENDIAN',
573                           msg="Checking for HAVE_BIG_ENDIAN - runtime")
574
575     # Extra sanity check.
576     if conf.CONFIG_SET("HAVE_BIG_ENDIAN") == conf.CONFIG_SET("HAVE_LITTLE_ENDIAN"):
577         Logs.error("Failed endian determination.  The PDP-11 is back?")
578         sys.exit(1)
579     else:
580         if conf.CONFIG_SET("HAVE_BIG_ENDIAN"):
581             conf.DEFINE('WORDS_BIGENDIAN', 1)
582
583     # check if signal() takes a void function
584     if conf.CHECK_CODE('return *(signal (0, 0)) (0) == 1',
585                        define='RETSIGTYPE_INT',
586                        execute=False,
587                        headers='signal.h',
588                        msg='Checking if signal handlers return int'):
589         conf.DEFINE('RETSIGTYPE', 'int')
590     else:
591         conf.DEFINE('RETSIGTYPE', 'void')
592
593     conf.CHECK_VARIABLE('__FUNCTION__', define='HAVE_FUNCTION_MACRO')
594
595     conf.CHECK_CODE('va_list ap1,ap2; va_copy(ap1,ap2)',
596                     define="HAVE_VA_COPY",
597                     msg="Checking for va_copy")
598
599     conf.CHECK_CODE('''
600                     #define eprintf(...) fprintf(stderr, __VA_ARGS__)
601                     eprintf("bla", "bar")
602                     ''', define='HAVE__VA_ARGS__MACRO')
603
604     conf.SAMBA_BUILD_ENV()
605
606
607 def build(bld):
608     # give a more useful message if the source directory has moved
609     relpath = os_path_relpath(bld.curdir, bld.srcnode.abspath())
610     if relpath.find('../') != -1:
611         Logs.error('bld.curdir %s is not a child of %s' % (bld.curdir, bld.srcnode.abspath()))
612         raise Utils.WafError('''The top source directory has moved. Please run distclean and reconfigure''')
613
614     bld.CHECK_MAKEFLAGS()
615     bld.SETUP_BUILD_GROUPS()
616     bld.ENFORCE_GROUP_ORDERING()
617     bld.CHECK_PROJECT_RULES()