buildtools/wafsamba/samba_autoconf.py

   1 # a waf tool to add autoconf-like macros to the configure section
   2
   3 import Build, os, sys, Options, preproc, Logs
   4 import string
   5 from Configure import conf
   6 from samba_utils import *
   7 import samba_cross
   8
   9 missing_headers = set()
  10
  11 ####################################################
  12 # some autoconf like helpers, to make the transition
  13 # to waf a bit easier for those used to autoconf
  14 # m4 files
  15
  16 @runonce
  17 @conf
  18 def DEFINE(conf, d, v, add_to_cflags=False, quote=False):
  19     '''define a config option'''
  20     conf.define(d, v, quote=quote)
  21     if add_to_cflags:
  22         conf.env.append_value('CCDEFINES', d + '=' + str(v))
  23
  24 def hlist_to_string(conf, headers=None):
  25     '''convert a headers list to a set of #include lines'''
  26     hdrs=''
  27     hlist = conf.env.hlist
  28     if headers:
  29         hlist = hlist[:]
  30         hlist.extend(TO_LIST(headers))
  31     for h in hlist:
  32         hdrs += '#include <%s>\n' % h
  33     return hdrs
  34
  35
  36 @conf
  37 def COMPOUND_START(conf, msg):
  38     '''start a compound test'''
  39     def null_check_message_1(self,*k,**kw):
  40         return
  41     def null_check_message_2(self,*k,**kw):
  42         return
  43
  44     v = getattr(conf.env, 'in_compound', [])
  45     if v != [] and v != 0:
  46         conf.env.in_compound = v + 1
  47         return
  48     conf.check_message_1(msg)
  49     conf.saved_check_message_1 = conf.check_message_1
  50     conf.check_message_1 = null_check_message_1
  51     conf.saved_check_message_2 = conf.check_message_2
  52     conf.check_message_2 = null_check_message_2
  53     conf.env.in_compound = 1
  54
  55
  56 @conf
  57 def COMPOUND_END(conf, result):
  58     '''start a compound test'''
  59     conf.env.in_compound -= 1
  60     if conf.env.in_compound != 0:
  61         return
  62     conf.check_message_1 = conf.saved_check_message_1
  63     conf.check_message_2 = conf.saved_check_message_2
  64     p = conf.check_message_2
  65     if result is True:
  66         p('ok')
  67     elif not result:
  68         p('not found', 'YELLOW')
  69     else:
  70         p(result)
  71
  72
  73 @feature('nolink')
  74 def nolink(self):
  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'''
  78     pass
  79
  80
  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:
  84         return False
  85     d = h.upper().replace('/', '_')
  86     d = d.replace('.', '_')
  87     d = d.replace('-', '_')
  88     d = 'HAVE_%s' % d
  89     if CONFIG_SET(conf, d):
  90         if add_headers:
  91             if not h in conf.env.hlist:
  92                 conf.env.hlist.append(h)
  93         return True
  94
  95     (ccflags, ldflags, cpppath) = library_flags(conf, lib)
  96
  97     hdrs = hlist_to_string(conf, headers=h)
  98     if lib is None:
  99         lib = ""
 100     ret = conf.check(fragment='%s\nint main(void) { return 0; }' % hdrs,
 101                      type='nolink',
 102                      execute=0,
 103                      ccflags=ccflags,
 104                      includes=cpppath,
 105                      uselib=lib.upper(),
 106                      msg="Checking for header %s" % h)
 107     if not ret:
 108         missing_headers.add(h)
 109         return False
 110
 111     conf.DEFINE(d, 1)
 112     if add_headers and not h in conf.env.hlist:
 113         conf.env.hlist.append(h)
 114     return ret
 115
 116
 117 @conf
 118 def CHECK_HEADERS(conf, headers, add_headers=False, together=False, lib=None):
 119     '''check for a list of headers
 120
 121     when together==True, then the headers accumulate within this test.
 122     This is useful for interdependent headers
 123     '''
 124     ret = True
 125     if not add_headers and together:
 126         saved_hlist = conf.env.hlist[:]
 127         set_add_headers = True
 128     else:
 129         set_add_headers = add_headers
 130     for hdr in TO_LIST(headers):
 131         if not CHECK_HEADER(conf, hdr, set_add_headers, lib=lib):
 132             ret = False
 133     if not add_headers and together:
 134         conf.env.hlist = saved_hlist
 135     return ret
 136
 137
 138 def header_list(conf, headers=None, lib=None):
 139     '''form a list of headers which exist, as a string'''
 140     hlist=[]
 141     if headers is not None:
 142         for h in TO_LIST(headers):
 143             if CHECK_HEADER(conf, h, add_headers=False, lib=lib):
 144                 hlist.append(h)
 145     return hlist_to_string(conf, headers=hlist)
 146
 147
 148 @conf
 149 def CHECK_TYPE(conf, t, alternate=None, headers=None, define=None, lib=None, msg=None):
 150     '''check for a single type'''
 151     if define is None:
 152         define = 'HAVE_' + t.upper().replace(' ', '_')
 153     if msg is None:
 154         msg='Checking for %s' % t
 155     ret = CHECK_CODE(conf, '%s _x' % t,
 156                      define,
 157                      execute=False,
 158                      headers=headers,
 159                      local_include=False,
 160                      msg=msg,
 161                      lib=lib,
 162                      link=False)
 163     if not ret and alternate:
 164         conf.DEFINE(t, alternate)
 165     return ret
 166
 167
 168 @conf
 169 def CHECK_TYPES(conf, list, headers=None, define=None, alternate=None, lib=None):
 170     '''check for a list of types'''
 171     ret = True
 172     for t in TO_LIST(list):
 173         if not CHECK_TYPE(conf, t, headers=headers,
 174                           define=define, alternate=alternate, lib=lib):
 175             ret = False
 176     return ret
 177
 178
 179 @conf
 180 def CHECK_TYPE_IN(conf, t, headers=None, alternate=None, define=None):
 181     '''check for a single type with a header'''
 182     return CHECK_TYPE(conf, t, headers=headers, alternate=alternate, define=define)
 183
 184
 185 @conf
 186 def CHECK_VARIABLE(conf, v, define=None, always=False,
 187                    headers=None, msg=None, lib=None):
 188     '''check for a variable declaration (or define)'''
 189     if define is None:
 190         define = 'HAVE_%s' % v.upper()
 191
 192     if msg is None:
 193         msg="Checking for variable %s" % v
 194
 195     return CHECK_CODE(conf,
 196                       # we need to make sure the compiler doesn't
 197                       # optimize it out...
 198                       '''
 199                       #ifndef %s
 200                       void *_x; _x=(void *)&%s; return (int)_x;
 201                       #endif
 202                       return 0
 203                       ''' % (v, v),
 204                       execute=False,
 205                       link=False,
 206                       msg=msg,
 207                       local_include=False,
 208                       lib=lib,
 209                       headers=headers,
 210                       define=define,
 211                       always=always)
 212
 213
 214 @conf
 215 def CHECK_DECLS(conf, vars, reverse=False, headers=None, always=False):
 216     '''check a list of variable declarations, using the HAVE_DECL_xxx form
 217        of define
 218
 219        When reverse==True then use HAVE_xxx_DECL instead of HAVE_DECL_xxx
 220        '''
 221     ret = True
 222     for v in TO_LIST(vars):
 223         if not reverse:
 224             define='HAVE_DECL_%s' % v.upper()
 225         else:
 226             define='HAVE_%s_DECL' % v.upper()
 227         if not CHECK_VARIABLE(conf, v,
 228                               define=define,
 229                               headers=headers,
 230                               msg='Checking for declaration of %s' % v,
 231                               always=always):
 232             ret = False
 233     return ret
 234
 235
 236 def CHECK_FUNC(conf, f, link=True, lib=None, headers=None):
 237     '''check for a function'''
 238     define='HAVE_%s' % f.upper()
 239
 240     ret = False
 241
 242     conf.COMPOUND_START('Checking for %s' % f)
 243
 244     if link is None or link:
 245         ret = CHECK_CODE(conf,
 246                          # this is based on the autoconf strategy
 247                          '''
 248                          #define %s __fake__%s
 249                          #ifdef HAVE_LIMITS_H
 250                          # include <limits.h>
 251                          #else
 252                          # include <assert.h>
 253                          #endif
 254                          #undef %s
 255                          #if defined __stub_%s || defined __stub___%s
 256                          #error "bad glibc stub"
 257                          #endif
 258                          extern char %s();
 259                          int main() { return %s(); }
 260                          ''' % (f, f, f, f, f, f, f),
 261                          execute=False,
 262                          link=True,
 263                          addmain=False,
 264                          add_headers=False,
 265                          define=define,
 266                          local_include=False,
 267                          lib=lib,
 268                          headers=headers,
 269                          msg='Checking for %s' % f)
 270
 271         if not ret:
 272             ret = CHECK_CODE(conf,
 273                              # it might be a macro
 274                              # we need to make sure the compiler doesn't
 275                              # optimize it out...
 276                              'void *__x = (void *)%s; return (int)__x' % f,
 277                              execute=False,
 278                              link=True,
 279                              addmain=True,
 280                              add_headers=True,
 281                              define=define,
 282                              local_include=False,
 283                              lib=lib,
 284                              headers=headers,
 285                              msg='Checking for macro %s' % f)
 286
 287     if not ret and (link is None or not link):
 288         ret = CHECK_VARIABLE(conf, f,
 289                              define=define,
 290                              headers=headers,
 291                              msg='Checking for declaration of %s' % f)
 292     conf.COMPOUND_END(ret)
 293     return ret
 294
 295
 296 @conf
 297 def CHECK_FUNCS(conf, list, link=True, lib=None, headers=None):
 298     '''check for a list of functions'''
 299     ret = True
 300     for f in TO_LIST(list):
 301         if not CHECK_FUNC(conf, f, link=link, lib=lib, headers=headers):
 302             ret = False
 303     return ret
 304
 305
 306 @conf
 307 def CHECK_SIZEOF(conf, vars, headers=None, define=None, critical=True):
 308     '''check the size of a type'''
 309     for v in TO_LIST(vars):
 310         v_define = define
 311         ret = False
 312         if v_define is None:
 313             v_define = 'SIZEOF_%s' % v.upper().replace(' ', '_')
 314         for size in list((1, 2, 4, 8, 16, 32)):
 315             if CHECK_CODE(conf,
 316                       'static int test_array[1 - 2 * !(((long int)(sizeof(%s))) <= %d)];' % (v, size),
 317                       define=v_define,
 318                       quote=False,
 319                       headers=headers,
 320                       local_include=False,
 321                       msg="Checking if size of %s == %d" % (v, size)):
 322                 conf.DEFINE(v_define, size)
 323                 ret = True
 324                 break
 325         if not ret and critical:
 326             Logs.error("Couldn't determine size of '%s'" % v)
 327             sys.exit(1)
 328     return ret
 329
 330 @conf
 331 def CHECK_VALUEOF(conf, v, headers=None, define=None):
 332     '''check the value of a variable/define'''
 333     ret = True
 334     v_define = define
 335     if v_define is None:
 336         v_define = 'VALUEOF_%s' % v.upper().replace(' ', '_')
 337     if CHECK_CODE(conf,
 338                   'printf("%%u", (unsigned)(%s))' % v,
 339                   define=v_define,
 340                   execute=True,
 341                   define_ret=True,
 342                   quote=False,
 343                   headers=headers,
 344                   local_include=False,
 345                   msg="Checking value of %s" % v):
 346         return int(conf.env[v_define])
 347
 348     return None
 349
 350 @conf
 351 def CHECK_CODE(conf, code, define,
 352                always=False, execute=False, addmain=True,
 353                add_headers=True, mandatory=False,
 354                headers=None, msg=None, cflags='', includes='# .',
 355                local_include=True, lib=None, link=True,
 356                define_ret=False, quote=False,
 357                on_target=True):
 358     '''check if some code compiles and/or runs'''
 359
 360     if CONFIG_SET(conf, define):
 361         return True
 362
 363     if headers is not None:
 364         CHECK_HEADERS(conf, headers=headers, lib=lib)
 365
 366     if add_headers:
 367         hdrs = header_list(conf, headers=headers, lib=lib)
 368     else:
 369         hdrs = ''
 370     if execute:
 371         execute = 1
 372     else:
 373         execute = 0
 374
 375     defs = conf.get_config_header()
 376
 377     if addmain:
 378         fragment='%s\n%s\n int main(void) { %s; return 0; }\n' % (defs, hdrs, code)
 379     else:
 380         fragment='%s\n%s\n%s\n' % (defs, hdrs, code)
 381
 382     if msg is None:
 383         msg="Checking for %s" % define
 384
 385     cflags = TO_LIST(cflags)
 386
 387     if local_include:
 388         cflags.append('-I%s' % conf.curdir)
 389
 390     if not link:
 391         type='nolink'
 392     else:
 393         type='cprogram'
 394
 395     uselib = TO_LIST(lib)
 396
 397     (ccflags, ldflags, cpppath) = library_flags(conf, uselib)
 398
 399     includes = TO_LIST(includes)
 400     includes.extend(cpppath)
 401
 402     uselib = [l.upper() for l in uselib]
 403
 404     cflags.extend(ccflags)
 405
 406     if on_target:
 407         exec_args = conf.SAMBA_CROSS_ARGS(msg=msg)
 408     else:
 409         exec_args = []
 410
 411     conf.COMPOUND_START(msg)
 412
 413     ret = conf.check(fragment=fragment,
 414                      execute=execute,
 415                      define_name = define,
 416                      mandatory = mandatory,
 417                      ccflags=cflags,
 418                      ldflags=ldflags,
 419                      includes=includes,
 420                      uselib=uselib,
 421                      type=type,
 422                      msg=msg,
 423                      quote=quote,
 424                      exec_args=exec_args,
 425                      define_ret=define_ret)
 426     if not ret and CONFIG_SET(conf, define):
 427         # sometimes conf.check() returns false, but it
 428         # sets the define. Maybe a waf bug?
 429         ret = True
 430     if ret:
 431         if not define_ret:
 432             conf.DEFINE(define, 1)
 433             conf.COMPOUND_END(True)
 434         else:
 435             conf.COMPOUND_END(conf.env[define])
 436         return True
 437     if always:
 438         conf.DEFINE(define, 0)
 439     conf.COMPOUND_END(False)
 440     return False
 441
 442
 443
 444 @conf
 445 def CHECK_STRUCTURE_MEMBER(conf, structname, member,
 446                            always=False, define=None, headers=None):
 447     '''check for a structure member'''
 448     if define is None:
 449         define = 'HAVE_%s' % member.upper()
 450     return CHECK_CODE(conf,
 451                       '%s s; void *_x; _x=(void *)&s.%s' % (structname, member),
 452                       define,
 453                       execute=False,
 454                       link=False,
 455                       always=always,
 456                       headers=headers,
 457                       local_include=False,
 458                       msg="Checking for member %s in %s" % (member, structname))
 459
 460
 461 @conf
 462 def CHECK_CFLAGS(conf, cflags, fragment='int main(void) { return 0; }\n'):
 463     '''check if the given cflags are accepted by the compiler
 464     '''
 465     return conf.check(fragment=fragment,
 466                       execute=0,
 467                       type='nolink',
 468                       ccflags=cflags,
 469                       msg="Checking compiler accepts %s" % cflags)
 470
 471 @conf
 472 def CHECK_LDFLAGS(conf, ldflags):
 473     '''check if the given ldflags are accepted by the linker
 474     '''
 475     return conf.check(fragment='int main(void) { return 0; }\n',
 476                       execute=0,
 477                       ldflags=ldflags,
 478                       msg="Checking linker accepts %s" % ldflags)
 479
 480
 481 @conf
 482 def CONFIG_GET(conf, option):
 483     '''return True if a configuration option was found'''
 484     if (option in conf.env):
 485         return conf.env[option]
 486     else:
 487         return None
 488
 489 @conf
 490 def CONFIG_SET(conf, option):
 491     '''return True if a configuration option was found'''
 492     if option not in conf.env:
 493         return False
 494     v = conf.env[option]
 495     if v is None:
 496         return False
 497     if v == []:
 498         return False
 499     if v == ():
 500         return False
 501     return True
 502
 503 @conf
 504 def CONFIG_RESET(conf, option):
 505     if option not in conf.env:
 506         return
 507     del conf.env[option]
 508
 509 Build.BuildContext.CONFIG_RESET = CONFIG_RESET
 510 Build.BuildContext.CONFIG_SET = CONFIG_SET
 511 Build.BuildContext.CONFIG_GET = CONFIG_GET
 512
 513
 514 def library_flags(self, libs):
 515     '''work out flags from pkg_config'''
 516     ccflags = []
 517     ldflags = []
 518     cpppath = []
 519     for lib in TO_LIST(libs):
 520         # note that we do not add the -I and -L in here, as that is added by the waf
 521         # core. Adding it here would just change the order that it is put on the link line
 522         # which can cause system paths to be added before internal libraries
 523         extra_ccflags = TO_LIST(getattr(self.env, 'CCFLAGS_%s' % lib.upper(), []))
 524         extra_ldflags = TO_LIST(getattr(self.env, 'LDFLAGS_%s' % lib.upper(), []))
 525         extra_cpppath = TO_LIST(getattr(self.env, 'CPPPATH_%s' % lib.upper(), []))
 526         ccflags.extend(extra_ccflags)
 527         ldflags.extend(extra_ldflags)
 528         cpppath.extend(extra_cpppath)
 529     if 'EXTRA_LDFLAGS' in self.env:
 530         ldflags.extend(self.env['EXTRA_LDFLAGS'])
 531
 532     ccflags = unique_list(ccflags)
 533     ldflags = unique_list(ldflags)
 534     cpppath = unique_list(cpppath)
 535     return (ccflags, ldflags, cpppath)
 536
 537
 538 @conf
 539 def CHECK_LIB(conf, libs, mandatory=False, empty_decl=True, set_target=True, shlib=False):
 540     '''check if a set of libraries exist as system libraries
 541
 542     returns the sublist of libs that do exist as a syslib or []
 543     '''
 544
 545     fragment= '''
 546 int foo()
 547 {
 548     int v = 2;
 549     return v*2;
 550 }
 551 '''
 552     ret = []
 553     liblist  = TO_LIST(libs)
 554     for lib in liblist[:]:
 555         if GET_TARGET_TYPE(conf, lib) == 'SYSLIB':
 556             ret.append(lib)
 557             continue
 558
 559         (ccflags, ldflags, cpppath) = library_flags(conf, lib)
 560         if shlib:
 561             res = conf.check(features='cc cshlib', fragment=fragment, lib=lib, uselib_store=lib, ccflags=ccflags, ldflags=ldflags, uselib=lib.upper())
 562         else:
 563             res = conf.check(lib=lib, uselib_store=lib, ccflags=ccflags, ldflags=ldflags, uselib=lib.upper())
 564
 565         if not res:
 566             if mandatory:
 567                 Logs.error("Mandatory library '%s' not found for functions '%s'" % (lib, list))
 568                 sys.exit(1)
 569             if empty_decl:
 570                 # if it isn't a mandatory library, then remove it from dependency lists
 571                 if set_target:
 572                     SET_TARGET_TYPE(conf, lib, 'EMPTY')
 573         else:
 574             conf.define('HAVE_LIB%s' % lib.upper().replace('-','_').replace('.','_'), 1)
 575             conf.env['LIB_' + lib.upper()] = lib
 576             if set_target:
 577                 conf.SET_TARGET_TYPE(lib, 'SYSLIB')
 578             ret.append(lib)
 579
 580     return ret
 581
 582
 583
 584 @conf
 585 def CHECK_FUNCS_IN(conf, list, library, mandatory=False, checklibc=False,
 586                    headers=None, link=True, empty_decl=True, set_target=True):
 587     """
 588     check that the functions in 'list' are available in 'library'
 589     if they are, then make that library available as a dependency
 590
 591     if the library is not available and mandatory==True, then
 592     raise an error.
 593
 594     If the library is not available and mandatory==False, then
 595     add the library to the list of dependencies to remove from
 596     build rules
 597
 598     optionally check for the functions first in libc
 599     """
 600     remaining = TO_LIST(list)
 601     liblist   = TO_LIST(library)
 602
 603     # check if some already found
 604     for f in remaining[:]:
 605         if CONFIG_SET(conf, 'HAVE_%s' % f.upper()):
 606             remaining.remove(f)
 607
 608     # see if the functions are in libc
 609     if checklibc:
 610         for f in remaining[:]:
 611             if CHECK_FUNC(conf, f, link=True, headers=headers):
 612                 remaining.remove(f)
 613
 614     if remaining == []:
 615         for lib in liblist:
 616             if GET_TARGET_TYPE(conf, lib) != 'SYSLIB' and empty_decl:
 617                 SET_TARGET_TYPE(conf, lib, 'EMPTY')
 618         return True
 619
 620     checklist = conf.CHECK_LIB(liblist, empty_decl=empty_decl, set_target=set_target)
 621     for lib in liblist[:]:
 622         if not lib in checklist and mandatory:
 623             Logs.error("Mandatory library '%s' not found for functions '%s'" % (lib, list))
 624             sys.exit(1)
 625
 626     ret = True
 627     for f in remaining:
 628         if not CHECK_FUNC(conf, f, lib=' '.join(checklist), headers=headers, link=link):
 629             ret = False
 630
 631     return ret
 632
 633
 634 @conf
 635 def IN_LAUNCH_DIR(conf):
 636     '''return True if this rule is being run from the launch directory'''
 637     return os.path.realpath(conf.curdir) == os.path.realpath(Options.launch_dir)
 638 Options.Handler.IN_LAUNCH_DIR = IN_LAUNCH_DIR
 639
 640
 641 @conf
 642 def SAMBA_CONFIG_H(conf, path=None):
 643     '''write out config.h in the right directory'''
 644     # we don't want to produce a config.h in places like lib/replace
 645     # when we are building projects that depend on lib/replace
 646     if not IN_LAUNCH_DIR(conf):
 647         return
 648
 649     if Options.options.debug:
 650         conf.ADD_CFLAGS('-g', testflags=True)
 651
 652     if Options.options.developer:
 653         conf.env.DEVELOPER_MODE = True
 654
 655         conf.ADD_CFLAGS('-g', testflags=True)
 656         conf.ADD_CFLAGS('-Wall', testflags=True)
 657         conf.ADD_CFLAGS('-Wshadow', testflags=True)
 658         conf.ADD_CFLAGS('-Wmissing-prototypes', testflags=True)
 659         conf.ADD_CFLAGS('-Wcast-align -Wcast-qual', testflags=True)
 660         conf.ADD_CFLAGS('-fno-common', testflags=True)
 661
 662         conf.ADD_CFLAGS('-Werror=address', testflags=True)
 663         # we add these here to ensure that -Wstrict-prototypes is not set during configure
 664         conf.ADD_CFLAGS('-Werror=strict-prototypes -Wstrict-prototypes',
 665                         testflags=True)
 666         conf.ADD_CFLAGS('-Werror=write-strings -Wwrite-strings',
 667                         testflags=True)
 668         conf.ADD_CFLAGS('-Werror-implicit-function-declaration',
 669                         testflags=True)
 670         conf.ADD_CFLAGS('-Werror=pointer-arith -Wpointer-arith',
 671                         testflags=True)
 672         conf.ADD_CFLAGS('-Werror=declaration-after-statement -Wdeclaration-after-statement',
 673                         testflags=True)
 674
 675         conf.ADD_CFLAGS('-Wformat=2 -Wno-format-y2k', testflags=True)
 676         # This check is because for ldb_search(), a NULL format string
 677         # is not an error, but some compilers complain about that.
 678         if CHECK_CFLAGS(conf, ["-Werror=format", "-Wformat=2"], '''
 679 int testformat(char *format, ...) __attribute__ ((format (__printf__, 1, 2)));
 680
 681 int main(void) {
 682         testformat(0);
 683         return 0;
 684 }
 685
 686 '''):
 687             if not 'EXTRA_CFLAGS' in conf.env:
 688                 conf.env['EXTRA_CFLAGS'] = []
 689             conf.env['EXTRA_CFLAGS'].extend(TO_LIST("-Werror=format"))
 690
 691     if Options.options.picky_developer:
 692         conf.ADD_NAMED_CFLAGS('PICKY_CFLAGS', '-Werror', testflags=True)
 693
 694     if Options.options.fatal_errors:
 695         conf.ADD_CFLAGS('-Wfatal-errors', testflags=True)
 696
 697     if Options.options.pedantic:
 698         conf.ADD_CFLAGS('-W', testflags=True)
 699
 700     if path is None:
 701         conf.write_config_header('config.h', top=True)
 702     else:
 703         conf.write_config_header(path)
 704     conf.SAMBA_CROSS_CHECK_COMPLETE()
 705
 706
 707 @conf
 708 def CONFIG_PATH(conf, name, default):
 709     '''setup a configurable path'''
 710     if not name in conf.env:
 711         if default[0] == '/':
 712             conf.env[name] = default
 713         else:
 714             conf.env[name] = conf.env['PREFIX'] + default
 715
 716 @conf
 717 def ADD_NAMED_CFLAGS(conf, name, flags, testflags=False):
 718     '''add some CFLAGS to the command line
 719        optionally set testflags to ensure all the flags work
 720     '''
 721     if testflags:
 722         ok_flags=[]
 723         for f in flags.split():
 724             if CHECK_CFLAGS(conf, f):
 725                 ok_flags.append(f)
 726         flags = ok_flags
 727     if not name in conf.env:
 728         conf.env[name] = []
 729     conf.env[name].extend(TO_LIST(flags))
 730
 731 @conf
 732 def ADD_CFLAGS(conf, flags, testflags=False):
 733     '''add some CFLAGS to the command line
 734        optionally set testflags to ensure all the flags work
 735     '''
 736     ADD_NAMED_CFLAGS(conf, 'EXTRA_CFLAGS', flags, testflags=testflags)
 737
 738 @conf
 739 def ADD_LDFLAGS(conf, flags, testflags=False):
 740     '''add some LDFLAGS to the command line
 741        optionally set testflags to ensure all the flags work
 742
 743        this will return the flags that are added, if any
 744     '''
 745     if testflags:
 746         ok_flags=[]
 747         for f in flags.split():
 748             if CHECK_LDFLAGS(conf, f):
 749                 ok_flags.append(f)
 750         flags = ok_flags
 751     if not 'EXTRA_LDFLAGS' in conf.env:
 752         conf.env['EXTRA_LDFLAGS'] = []
 753     conf.env['EXTRA_LDFLAGS'].extend(TO_LIST(flags))
 754     return flags
 755
 756
 757 @conf
 758 def ADD_EXTRA_INCLUDES(conf, includes):
 759     '''add some extra include directories to all builds'''
 760     if not 'EXTRA_INCLUDES' in conf.env:
 761         conf.env['EXTRA_INCLUDES'] = []
 762     conf.env['EXTRA_INCLUDES'].extend(TO_LIST(includes))
 763
 764
 765
 766 def CURRENT_CFLAGS(bld, target, cflags, allow_warnings=True, hide_symbols=False):
 767     '''work out the current flags. local flags are added first'''
 768     ret = TO_LIST(cflags)
 769     if not 'EXTRA_CFLAGS' in bld.env:
 770         list = []
 771     else:
 772         list = bld.env['EXTRA_CFLAGS'];
 773     ret.extend(list)
 774     if not allow_warnings and 'PICKY_CFLAGS' in bld.env:
 775         list = bld.env['PICKY_CFLAGS'];
 776         ret.extend(list)
 777     if hide_symbols and bld.env.HAVE_VISIBILITY_ATTR:
 778         ret.append('-fvisibility=hidden')
 779     return ret
 780
 781
 782 @conf
 783 def CHECK_CC_ENV(conf):
 784     """trim whitespaces from 'CC'.
 785     The build farm sometimes puts a space at the start"""
 786     if os.environ.get('CC'):
 787         conf.env.CC = TO_LIST(os.environ.get('CC'))
 788         if len(conf.env.CC) == 1:
 789             # make for nicer logs if just a single command
 790             conf.env.CC = conf.env.CC[0]
 791
 792
 793 @conf
 794 def SETUP_CONFIGURE_CACHE(conf, enable):
 795     '''enable/disable cache of configure results'''
 796     if enable:
 797         # when -C is chosen, we will use a private cache and will
 798         # not look into system includes. This roughtly matches what
 799         # autoconf does with -C
 800         cache_path = os.path.join(conf.blddir, '.confcache')
 801         mkdir_p(cache_path)
 802         Options.cache_global = os.environ['WAFCACHE'] = cache_path
 803     else:
 804         # when -C is not chosen we will not cache configure checks
 805         # We set the recursion limit low to prevent waf from spending
 806         # a lot of time on the signatures of the files.
 807         Options.cache_global = os.environ['WAFCACHE'] = ''
 808         preproc.recursion_limit = 1
 809     # in either case we don't need to scan system includes
 810     preproc.go_absolute = False
 811
 812
 813 @conf
 814 def SAMBA_CHECK_UNDEFINED_SYMBOL_FLAGS(conf):
 815     # we don't want any libraries or modules to rely on runtime
 816     # resolution of symbols
 817     if not sys.platform.startswith("openbsd"):
 818         conf.env.undefined_ldflags = conf.ADD_LDFLAGS('-Wl,-no-undefined', testflags=True)
 819
 820     if not sys.platform.startswith("openbsd") and conf.env.undefined_ignore_ldflags == []:
 821         if conf.CHECK_LDFLAGS(['-undefined', 'dynamic_lookup']):
 822             conf.env.undefined_ignore_ldflags = ['-undefined', 'dynamic_lookup']