1 # a waf tool to add autoconf-like macros to the configure section
4 from waflib import Build, Options, Logs, Context
5 from waflib.Configure import conf
6 from waflib.TaskGen import feature
7 from waflib.Tools import c_preproc as preproc
8 from samba_utils import TO_LIST, GET_TARGET_TYPE, SET_TARGET_TYPE, unique_list, mkdir_p
10 missing_headers = set()
12 ####################################################
13 # some autoconf like helpers, to make the transition
14 # to waf a bit easier for those used to autoconf
18 def DEFINE(conf, d, v, add_to_cflags=False, quote=False):
19 '''define a config option'''
20 conf.define(d, v, quote=quote)
22 conf.env.append_value('CFLAGS', '-D%s=%s' % (d, str(v)))
24 def hlist_to_string(conf, headers=None):
25 '''convert a headers list to a set of #include lines'''
27 hlist = conf.env.hlist
30 hlist.extend(TO_LIST(headers))
32 hdrs += '#include <%s>\n' % h
37 def COMPOUND_START(conf, msg):
38 '''start a compound test'''
39 def null_check_message_1(self,*k,**kw):
41 def null_check_message_2(self,*k,**kw):
44 v = getattr(conf.env, 'in_compound', [])
45 if v != [] and v != 0:
46 conf.env.in_compound = v + 1
49 conf.saved_check_message_1 = conf.start_msg
50 conf.start_msg = null_check_message_1
51 conf.saved_check_message_2 = conf.end_msg
52 conf.end_msg = null_check_message_2
53 conf.env.in_compound = 1
57 def COMPOUND_END(conf, result):
58 '''start a compound test'''
59 conf.env.in_compound -= 1
60 if conf.env.in_compound != 0:
62 conf.start_msg = conf.saved_check_message_1
63 conf.end_msg = conf.saved_check_message_2
68 p('not found', 'YELLOW')
75 '''using the nolink type in conf.check() allows us to avoid
76 the link stage of a test, thus speeding it up for tests
77 that where linking is not needed'''
81 def CHECK_HEADER(conf, h, add_headers=False, lib=None):
82 '''check for a header'''
83 if h in missing_headers and lib is None:
85 d = h.upper().replace('/', '_')
86 d = d.replace('.', '_')
87 d = d.replace('-', '_')
89 if CONFIG_SET(conf, d):
91 if not h in conf.env.hlist:
92 conf.env.hlist.append(h)
95 (ccflags, ldflags, cpppath) = library_flags(conf, lib)
97 hdrs = hlist_to_string(conf, headers=h)
100 ret = conf.check(fragment='%s\nint main(void) { return 0; }\n' % hdrs,
107 msg="Checking for header %s" % h)
109 missing_headers.add(h)
113 if add_headers and not h in conf.env.hlist:
114 conf.env.hlist.append(h)
119 def CHECK_HEADERS(conf, headers, add_headers=False, together=False, lib=None):
120 '''check for a list of headers
122 when together==True, then the headers accumulate within this test.
123 This is useful for interdependent headers
126 if not add_headers and together:
127 saved_hlist = conf.env.hlist[:]
128 set_add_headers = True
130 set_add_headers = add_headers
131 for hdr in TO_LIST(headers):
132 if not CHECK_HEADER(conf, hdr, set_add_headers, lib=lib):
134 if not add_headers and together:
135 conf.env.hlist = saved_hlist
139 def header_list(conf, headers=None, lib=None):
140 '''form a list of headers which exist, as a string'''
142 if headers is not None:
143 for h in TO_LIST(headers):
144 if CHECK_HEADER(conf, h, add_headers=False, lib=lib):
146 return hlist_to_string(conf, headers=hlist)
150 def CHECK_TYPE(conf, t, alternate=None, headers=None, define=None, lib=None, msg=None):
151 '''check for a single type'''
153 define = 'HAVE_' + t.upper().replace(' ', '_')
155 msg='Checking for %s' % t
156 ret = CHECK_CODE(conf, '%s _x' % t,
164 if not ret and alternate:
165 conf.DEFINE(t, alternate)
170 def CHECK_TYPES(conf, list, headers=None, define=None, alternate=None, lib=None):
171 '''check for a list of types'''
173 for t in TO_LIST(list):
174 if not CHECK_TYPE(conf, t, headers=headers,
175 define=define, alternate=alternate, lib=lib):
181 def CHECK_TYPE_IN(conf, t, headers=None, alternate=None, define=None):
182 '''check for a single type with a header'''
183 return CHECK_TYPE(conf, t, headers=headers, alternate=alternate, define=define)
187 def CHECK_VARIABLE(conf, v, define=None, always=False,
188 headers=None, msg=None, lib=None):
189 '''check for a variable declaration (or define)'''
191 define = 'HAVE_%s' % v.upper()
194 msg="Checking for variable %s" % v
196 return CHECK_CODE(conf,
197 # we need to make sure the compiler doesn't
201 void *_x; _x=(void *)&%s; return (int)_x;
216 def CHECK_DECLS(conf, vars, reverse=False, headers=None, always=False):
217 '''check a list of variable declarations, using the HAVE_DECL_xxx form
220 When reverse==True then use HAVE_xxx_DECL instead of HAVE_DECL_xxx
223 for v in TO_LIST(vars):
225 define='HAVE_DECL_%s' % v.upper()
227 define='HAVE_%s_DECL' % v.upper()
228 if not CHECK_VARIABLE(conf, v,
231 msg='Checking for declaration of %s' % v,
233 if not CHECK_CODE(conf,
239 msg='Checking for declaration of %s (as enum)' % v,
248 def CHECK_FUNC(conf, f, link=True, lib=None, headers=None):
249 '''check for a function'''
250 define='HAVE_%s' % f.upper()
254 conf.COMPOUND_START('Checking for %s' % f)
256 if link is None or link:
257 ret = CHECK_CODE(conf,
258 # this is based on the autoconf strategy
260 #define %s __fake__%s
267 #if defined __stub_%s || defined __stub___%s
268 #error "bad glibc stub"
271 int main() { return %s(); }
272 ''' % (f, f, f, f, f, f, f),
281 msg='Checking for %s' % f)
284 ret = CHECK_CODE(conf,
285 # it might be a macro
286 # we need to make sure the compiler doesn't
288 'void *__x = (void *)%s; return (int)__x' % f,
297 msg='Checking for macro %s' % f)
299 if not ret and (link is None or not link):
300 ret = CHECK_VARIABLE(conf, f,
303 msg='Checking for declaration of %s' % f)
304 conf.COMPOUND_END(ret)
309 def CHECK_FUNCS(conf, list, link=True, lib=None, headers=None):
310 '''check for a list of functions'''
312 for f in TO_LIST(list):
313 if not CHECK_FUNC(conf, f, link=link, lib=lib, headers=headers):
319 def CHECK_SIZEOF(conf, vars, headers=None, define=None, critical=True):
320 '''check the size of a type'''
321 for v in TO_LIST(vars):
325 v_define = 'SIZEOF_%s' % v.upper().replace(' ', '_')
326 for size in list((1, 2, 4, 8, 16, 32, 64)):
328 'static int test_array[1 - 2 * !(((long int)(sizeof(%s))) <= %d)];' % (v, size),
333 msg="Checking if size of %s == %d" % (v, size)):
334 conf.DEFINE(v_define, size)
337 if not ret and critical:
338 Logs.error("Couldn't determine size of '%s'" % v)
343 def CHECK_VALUEOF(conf, v, headers=None, define=None):
344 '''check the value of a variable/define'''
348 v_define = 'VALUEOF_%s' % v.upper().replace(' ', '_')
350 'printf("%%u", (unsigned)(%s))' % v,
357 msg="Checking value of %s" % v):
358 return int(conf.env[v_define])
363 def CHECK_CODE(conf, code, define,
364 always=False, execute=False, addmain=True,
365 add_headers=True, mandatory=False,
366 headers=None, msg=None, cflags='', includes='# .',
367 local_include=True, lib=None, link=True,
368 define_ret=False, quote=False,
369 on_target=True, strict=False):
370 '''check if some code compiles and/or runs'''
372 if CONFIG_SET(conf, define):
375 if headers is not None:
376 CHECK_HEADERS(conf, headers=headers, lib=lib)
379 hdrs = header_list(conf, headers=headers, lib=lib)
388 fragment='%s\n int main(void) { %s; return 0; }\n' % (hdrs, code)
390 fragment='%s\n%s\n' % (hdrs, code)
393 msg="Checking for %s" % define
395 cflags = TO_LIST(cflags)
397 # Be strict when relying on a compiler check
398 # Some compilers (e.g. xlc) ignore non-supported features as warnings
400 if 'WERROR_CFLAGS' in conf.env:
401 cflags.extend(conf.env['WERROR_CFLAGS'])
404 cflags.append('-I%s' % conf.path.abspath())
411 uselib = TO_LIST(lib)
413 (ccflags, ldflags, cpppath) = library_flags(conf, uselib)
415 includes = TO_LIST(includes)
416 includes.extend(cpppath)
418 uselib = [l.upper() for l in uselib]
420 cflags.extend(ccflags)
423 exec_args = conf.SAMBA_CROSS_ARGS(msg=msg)
427 conf.COMPOUND_START(msg)
430 ret = conf.check(fragment=fragment,
432 define_name = define,
441 define_ret=define_ret)
444 conf.DEFINE(define, 0)
446 conf.undefine(define)
447 conf.COMPOUND_END(False)
452 # Success is indicated by ret but we should unset
453 # defines set by WAF's c_config.check() because it
454 # defines it to int(ret) and we want to undefine it
456 conf.undefine(define)
457 conf.COMPOUND_END(False)
460 conf.DEFINE(define, 1)
461 conf.COMPOUND_END(True)
463 conf.DEFINE(define, ret, quote=quote)
464 conf.COMPOUND_END(ret)
469 def CHECK_STRUCTURE_MEMBER(conf, structname, member,
470 always=False, define=None, headers=None,
472 '''check for a structure member'''
474 define = 'HAVE_%s' % member.upper()
475 return CHECK_CODE(conf,
476 '%s s; void *_x; _x=(void *)&s.%s' % (structname, member),
484 msg="Checking for member %s in %s" % (member, structname))
488 def CHECK_CFLAGS(conf, cflags, fragment='int main(void) { return 0; }\n'):
489 '''check if the given cflags are accepted by the compiler
491 check_cflags = TO_LIST(cflags)
492 if 'WERROR_CFLAGS' in conf.env:
493 check_cflags.extend(conf.env['WERROR_CFLAGS'])
494 return conf.check(fragment=fragment,
499 msg="Checking compiler accepts %s" % cflags)
502 def CHECK_LDFLAGS(conf, ldflags):
503 '''check if the given ldflags are accepted by the linker
505 return conf.check(fragment='int main(void) { return 0; }\n',
509 msg="Checking linker accepts %s" % ldflags)
513 def CONFIG_GET(conf, option):
514 '''return True if a configuration option was found'''
515 if (option in conf.env):
516 return conf.env[option]
521 def CONFIG_SET(conf, option):
522 '''return True if a configuration option was found'''
523 if option not in conf.env:
535 def CONFIG_RESET(conf, option):
536 if option not in conf.env:
540 Build.BuildContext.CONFIG_RESET = CONFIG_RESET
541 Build.BuildContext.CONFIG_SET = CONFIG_SET
542 Build.BuildContext.CONFIG_GET = CONFIG_GET
545 def library_flags(self, libs):
546 '''work out flags from pkg_config'''
550 for lib in TO_LIST(libs):
551 # note that we do not add the -I and -L in here, as that is added by the waf
552 # core. Adding it here would just change the order that it is put on the link line
553 # which can cause system paths to be added before internal libraries
554 extra_ccflags = TO_LIST(getattr(self.env, 'CFLAGS_%s' % lib.upper(), []))
555 extra_ldflags = TO_LIST(getattr(self.env, 'LDFLAGS_%s' % lib.upper(), []))
556 extra_cpppath = TO_LIST(getattr(self.env, 'CPPPATH_%s' % lib.upper(), []))
557 ccflags.extend(extra_ccflags)
558 ldflags.extend(extra_ldflags)
559 cpppath.extend(extra_cpppath)
561 extra_cpppath = TO_LIST(getattr(self.env, 'INCLUDES_%s' % lib.upper(), []))
562 cpppath.extend(extra_cpppath)
563 if 'EXTRA_LDFLAGS' in self.env:
564 ldflags.extend(self.env['EXTRA_LDFLAGS'])
566 ccflags = unique_list(ccflags)
567 ldflags = unique_list(ldflags)
568 cpppath = unique_list(cpppath)
569 return (ccflags, ldflags, cpppath)
573 def CHECK_LIB(conf, libs, mandatory=False, empty_decl=True, set_target=True, shlib=False):
574 '''check if a set of libraries exist as system libraries
576 returns the sublist of libs that do exist as a syslib or []
587 liblist = TO_LIST(libs)
588 for lib in liblist[:]:
589 if GET_TARGET_TYPE(conf, lib) == 'SYSLIB':
593 (ccflags, ldflags, cpppath) = library_flags(conf, lib)
595 res = conf.check(features='c cshlib', fragment=fragment, lib=lib, uselib_store=lib, cflags=ccflags, ldflags=ldflags, uselib=lib.upper(), mandatory=False)
597 res = conf.check(lib=lib, uselib_store=lib, cflags=ccflags, ldflags=ldflags, uselib=lib.upper(), mandatory=False)
601 Logs.error("Mandatory library '%s' not found for functions '%s'" % (lib, list))
604 # if it isn't a mandatory library, then remove it from dependency lists
606 SET_TARGET_TYPE(conf, lib, 'EMPTY')
608 conf.define('HAVE_LIB%s' % lib.upper().replace('-','_').replace('.','_'), 1)
609 conf.env['LIB_' + lib.upper()] = lib
611 conf.SET_TARGET_TYPE(lib, 'SYSLIB')
619 def CHECK_FUNCS_IN(conf, list, library, mandatory=False, checklibc=False,
620 headers=None, link=True, empty_decl=True, set_target=True):
622 check that the functions in 'list' are available in 'library'
623 if they are, then make that library available as a dependency
625 if the library is not available and mandatory==True, then
628 If the library is not available and mandatory==False, then
629 add the library to the list of dependencies to remove from
632 optionally check for the functions first in libc
634 remaining = TO_LIST(list)
635 liblist = TO_LIST(library)
637 # check if some already found
638 for f in remaining[:]:
639 if CONFIG_SET(conf, 'HAVE_%s' % f.upper()):
642 # see if the functions are in libc
644 for f in remaining[:]:
645 if CHECK_FUNC(conf, f, link=True, headers=headers):
650 if GET_TARGET_TYPE(conf, lib) != 'SYSLIB' and empty_decl:
651 SET_TARGET_TYPE(conf, lib, 'EMPTY')
654 checklist = conf.CHECK_LIB(liblist, empty_decl=empty_decl, set_target=set_target)
655 for lib in liblist[:]:
656 if not lib in checklist and mandatory:
657 Logs.error("Mandatory library '%s' not found for functions '%s'" % (lib, list))
662 if not CHECK_FUNC(conf, f, lib=' '.join(checklist), headers=headers, link=link):
669 def IN_LAUNCH_DIR(conf):
670 '''return True if this rule is being run from the launch directory'''
671 return os.path.realpath(conf.path.abspath()) == os.path.realpath(Context.launch_dir)
672 Options.OptionsContext.IN_LAUNCH_DIR = IN_LAUNCH_DIR
676 def SAMBA_CONFIG_H(conf, path=None):
677 '''write out config.h in the right directory'''
678 # we don't want to produce a config.h in places like lib/replace
679 # when we are building projects that depend on lib/replace
680 if not IN_LAUNCH_DIR(conf):
683 # we need to build real code that can't be optimized away to test
684 stack_protect_list = ['-fstack-protector-strong', '-fstack-protector']
685 for stack_protect_flag in stack_protect_list:
686 flag_supported = conf.check(fragment='''
692 while (fgets(t, sizeof(t), stdin));
697 cflags=[ '-Werror', '-Wp,-D_FORTIFY_SOURCE=2', stack_protect_flag],
699 msg='Checking if compiler accepts %s' % (stack_protect_flag))
701 conf.ADD_CFLAGS('%s' % (stack_protect_flag))
704 flag_supported = conf.check(fragment='''
710 while (fgets(t, sizeof(t), stdin));
715 cflags=[ '-Werror', '-fstack-clash-protection'],
717 msg='Checking if compiler accepts -fstack-clash-protection')
719 conf.ADD_CFLAGS('-fstack-clash-protection')
721 if Options.options.debug:
722 conf.ADD_CFLAGS('-g', testflags=True)
724 if Options.options.developer:
725 conf.env.DEVELOPER_MODE = True
727 conf.ADD_CFLAGS('-g', testflags=True)
728 conf.ADD_CFLAGS('-Wall', testflags=True)
729 conf.ADD_CFLAGS('-Wshadow', testflags=True)
730 conf.ADD_CFLAGS('-Wmissing-prototypes', testflags=True)
731 conf.ADD_CFLAGS('-Wcast-align -Wcast-qual', testflags=True)
732 conf.ADD_CFLAGS('-fno-common', testflags=True)
734 conf.ADD_CFLAGS('-Werror=address', testflags=True)
735 # we add these here to ensure that -Wstrict-prototypes is not set during configure
736 conf.ADD_CFLAGS('-Werror=strict-prototypes -Wstrict-prototypes',
738 conf.ADD_CFLAGS('-Werror=write-strings -Wwrite-strings',
740 conf.ADD_CFLAGS('-Werror-implicit-function-declaration',
742 conf.ADD_CFLAGS('-Werror=pointer-arith -Wpointer-arith',
744 conf.ADD_CFLAGS('-Werror=declaration-after-statement -Wdeclaration-after-statement',
746 conf.ADD_CFLAGS('-Werror=return-type -Wreturn-type',
748 conf.ADD_CFLAGS('-Werror=uninitialized -Wuninitialized',
750 conf.ADD_CFLAGS('-Wimplicit-fallthrough',
752 conf.ADD_CFLAGS('-Werror=strict-overflow -Wstrict-overflow=2',
755 conf.ADD_CFLAGS('-Wformat=2 -Wno-format-y2k', testflags=True)
756 conf.ADD_CFLAGS('-Wno-format-zero-length', testflags=True)
757 conf.ADD_CFLAGS('-Werror=format-security -Wformat-security',
758 testflags=True, prereq_flags='-Wformat')
759 # This check is because for ldb_search(), a NULL format string
760 # is not an error, but some compilers complain about that.
761 if CHECK_CFLAGS(conf, ["-Werror=format", "-Wformat=2"], '''
762 int testformat(char *format, ...) __attribute__ ((format (__printf__, 1, 2)));
770 if not 'EXTRA_CFLAGS' in conf.env:
771 conf.env['EXTRA_CFLAGS'] = []
772 conf.env['EXTRA_CFLAGS'].extend(TO_LIST("-Werror=format"))
774 if Options.options.picky_developer:
775 conf.ADD_NAMED_CFLAGS('PICKY_CFLAGS', '-Werror -Wno-error=deprecated-declarations', testflags=True)
776 conf.ADD_NAMED_CFLAGS('PICKY_CFLAGS', '-Wno-error=tautological-compare', testflags=True)
778 if Options.options.fatal_errors:
779 conf.ADD_CFLAGS('-Wfatal-errors', testflags=True)
781 if Options.options.pedantic:
782 conf.ADD_CFLAGS('-W', testflags=True)
784 if Options.options.address_sanitizer:
785 conf.ADD_CFLAGS('-fno-omit-frame-pointer -O1 -fsanitize=address', testflags=True)
786 conf.ADD_LDFLAGS('-fsanitize=address', testflags=True)
787 conf.env['ADDRESS_SANITIZER'] = True
790 # Let people pass an additional ADDITIONAL_{CFLAGS,LDFLAGS}
791 # environment variables which are only used the for final build.
793 # The CFLAGS and LDFLAGS environment variables are also
794 # used for the configure checks which might impact their results.
795 conf.add_os_flags('ADDITIONAL_CFLAGS')
796 if conf.env.ADDITIONAL_CFLAGS and conf.CHECK_CFLAGS(conf.env['ADDITIONAL_CFLAGS']):
797 conf.env['EXTRA_CFLAGS'].extend(conf.env['ADDITIONAL_CFLAGS'])
798 conf.add_os_flags('ADDITIONAL_LDFLAGS')
799 if conf.env.ADDITIONAL_LDFLAGS and conf.CHECK_LDFLAGS(conf.env['ADDITIONAL_LDFLAGS']):
800 conf.env['EXTRA_LDFLAGS'].extend(conf.env['ADDITIONAL_LDFLAGS'])
803 conf.write_config_header('default/config.h', top=True, remove=False)
805 conf.write_config_header(os.path.join(conf.variant, path), remove=False)
806 for key in conf.env.define_key:
807 conf.undefine(key, from_env=False)
808 conf.env.define_key = []
809 conf.SAMBA_CROSS_CHECK_COMPLETE()
813 def CONFIG_PATH(conf, name, default):
814 '''setup a configurable path'''
815 if not name in conf.env:
816 if default[0] == '/':
817 conf.env[name] = default
819 conf.env[name] = conf.env['PREFIX'] + default
822 def ADD_NAMED_CFLAGS(conf, name, flags, testflags=False, prereq_flags=[]):
823 '''add some CFLAGS to the command line
824 optionally set testflags to ensure all the flags work
826 prereq_flags = TO_LIST(prereq_flags)
829 for f in flags.split():
830 if CHECK_CFLAGS(conf, [f] + prereq_flags):
833 if not name in conf.env:
835 conf.env[name].extend(TO_LIST(flags))
838 def ADD_CFLAGS(conf, flags, testflags=False, prereq_flags=[]):
839 '''add some CFLAGS to the command line
840 optionally set testflags to ensure all the flags work
842 ADD_NAMED_CFLAGS(conf, 'EXTRA_CFLAGS', flags, testflags=testflags,
843 prereq_flags=prereq_flags)
846 def ADD_LDFLAGS(conf, flags, testflags=False):
847 '''add some LDFLAGS to the command line
848 optionally set testflags to ensure all the flags work
850 this will return the flags that are added, if any
854 for f in flags.split():
855 if CHECK_LDFLAGS(conf, f):
858 if not 'EXTRA_LDFLAGS' in conf.env:
859 conf.env['EXTRA_LDFLAGS'] = []
860 conf.env['EXTRA_LDFLAGS'].extend(TO_LIST(flags))
865 def ADD_EXTRA_INCLUDES(conf, includes):
866 '''add some extra include directories to all builds'''
867 if not 'EXTRA_INCLUDES' in conf.env:
868 conf.env['EXTRA_INCLUDES'] = []
869 conf.env['EXTRA_INCLUDES'].extend(TO_LIST(includes))
873 def CURRENT_CFLAGS(bld, target, cflags, allow_warnings=False, hide_symbols=False):
874 '''work out the current flags. local flags are added first'''
875 ret = TO_LIST(cflags)
876 if not 'EXTRA_CFLAGS' in bld.env:
879 list = bld.env['EXTRA_CFLAGS'];
881 if not allow_warnings and 'PICKY_CFLAGS' in bld.env:
882 list = bld.env['PICKY_CFLAGS'];
884 if hide_symbols and bld.env.HAVE_VISIBILITY_ATTR:
885 ret.append(bld.env.VISIBILITY_CFLAGS)
890 def CHECK_CC_ENV(conf):
891 """trim whitespaces from 'CC'.
892 The build farm sometimes puts a space at the start"""
893 if os.environ.get('CC'):
894 conf.env.CC = TO_LIST(os.environ.get('CC'))
898 def SETUP_CONFIGURE_CACHE(conf, enable):
899 '''enable/disable cache of configure results'''
901 # when -C is chosen, we will use a private cache and will
902 # not look into system includes. This roughtly matches what
903 # autoconf does with -C
904 cache_path = os.path.join(conf.bldnode.abspath(), '.confcache')
906 Options.cache_global = os.environ['WAFCACHE'] = cache_path
908 # when -C is not chosen we will not cache configure checks
909 # We set the recursion limit low to prevent waf from spending
910 # a lot of time on the signatures of the files.
911 Options.cache_global = os.environ['WAFCACHE'] = ''
912 preproc.recursion_limit = 1
913 # in either case we don't need to scan system includes
914 preproc.go_absolute = False
918 def SAMBA_CHECK_UNDEFINED_SYMBOL_FLAGS(conf):
919 # we don't want any libraries or modules to rely on runtime
920 # resolution of symbols
921 if not sys.platform.startswith("openbsd"):
922 conf.env.undefined_ldflags = conf.ADD_LDFLAGS('-Wl,-no-undefined', testflags=True)
924 if not sys.platform.startswith("openbsd") and conf.env.undefined_ignore_ldflags == []:
925 if conf.CHECK_LDFLAGS(['-undefined', 'dynamic_lookup']):
926 conf.env.undefined_ignore_ldflags = ['-undefined', 'dynamic_lookup']