scons/gallium.py

   1 """gallium
   2
   3 Frontend-tool for Gallium3D architecture.
   4
   5 """
   6
   7 #
   8 # Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
   9 # All Rights Reserved.
  10 #
  11 # Permission is hereby granted, free of charge, to any person obtaining a
  12 # copy of this software and associated documentation files (the
  13 # "Software"), to deal in the Software without restriction, including
  14 # without limitation the rights to use, copy, modify, merge, publish,
  15 # distribute, sub license, and/or sell copies of the Software, and to
  16 # permit persons to whom the Software is furnished to do so, subject to
  17 # the following conditions:
  18 #
  19 # The above copyright notice and this permission notice (including the
  20 # next paragraph) shall be included in all copies or substantial portions
  21 # of the Software.
  22 #
  23 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  24 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  26 # IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  27 # ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  28 # TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  29 # SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 #
  31
  32
  33 import distutils.version
  34 import os
  35 import os.path
  36 import re
  37 import subprocess
  38 import platform as _platform
  39
  40 import SCons.Action
  41 import SCons.Builder
  42 import SCons.Scanner
  43
  44
  45 def symlink(target, source, env):
  46     target = str(target[0])
  47     source = str(source[0])
  48     if os.path.islink(target) or os.path.exists(target):
  49         os.remove(target)
  50     os.symlink(os.path.basename(source), target)
  51
  52 def install(env, source, subdir):
  53     target_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'], subdir)
  54     return env.Install(target_dir, source)
  55
  56 def install_program(env, source):
  57     return install(env, source, 'bin')
  58
  59 def install_shared_library(env, sources, version = ()):
  60     targets = []
  61     install_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'])
  62     version = tuple(map(str, version))
  63     if env['SHLIBSUFFIX'] == '.dll':
  64         dlls = env.FindIxes(sources, 'SHLIBPREFIX', 'SHLIBSUFFIX')
  65         targets += install(env, dlls, 'bin')
  66         libs = env.FindIxes(sources, 'LIBPREFIX', 'LIBSUFFIX')
  67         targets += install(env, libs, 'lib')
  68     else:
  69         for source in sources:
  70             target_dir =  os.path.join(install_dir, 'lib')
  71             target_name = '.'.join((str(source),) + version)
  72             last = env.InstallAs(os.path.join(target_dir, target_name), source)
  73             targets += last
  74             while len(version):
  75                 version = version[:-1]
  76                 target_name = '.'.join((str(source),) + version)
  77                 action = SCons.Action.Action(symlink, "  Symlinking $TARGET ...")
  78                 last = env.Command(os.path.join(target_dir, target_name), last, action)
  79                 targets += last
  80     return targets
  81
  82
  83 def createInstallMethods(env):
  84     env.AddMethod(install_program, 'InstallProgram')
  85     env.AddMethod(install_shared_library, 'InstallSharedLibrary')
  86
  87
  88 def num_jobs():
  89     try:
  90         return int(os.environ['NUMBER_OF_PROCESSORS'])
  91     except (ValueError, KeyError):
  92         pass
  93
  94     try:
  95         return os.sysconf('SC_NPROCESSORS_ONLN')
  96     except (ValueError, OSError, AttributeError):
  97         pass
  98
  99     try:
 100         return int(os.popen2("sysctl -n hw.ncpu")[1].read())
 101     except ValueError:
 102         pass
 103
 104     return 1
 105
 106
 107 def generate(env):
 108     """Common environment generation code"""
 109
 110     # Tell tools which machine to compile for
 111     env['TARGET_ARCH'] = env['machine']
 112     env['MSVS_ARCH'] = env['machine']
 113
 114     # Toolchain
 115     platform = env['platform']
 116     if env['toolchain'] == 'default':
 117         if platform == 'winddk':
 118             env['toolchain'] = 'winddk'
 119         elif platform == 'wince':
 120             env['toolchain'] = 'wcesdk'
 121     env.Tool(env['toolchain'])
 122
 123     # Allow override compiler and specify additional flags from environment
 124     if os.environ.has_key('CC'):
 125         env['CC'] = os.environ['CC']
 126         # Update CCVERSION to match
 127         pipe = SCons.Action._subproc(env, [env['CC'], '--version'],
 128                                      stdin = 'devnull',
 129                                      stderr = 'devnull',
 130                                      stdout = subprocess.PIPE)
 131         if pipe.wait() == 0:
 132             line = pipe.stdout.readline()
 133             match = re.search(r'[0-9]+(\.[0-9]+)+', line)
 134             if match:
 135                 env['CCVERSION'] = match.group(0)
 136     if os.environ.has_key('CFLAGS'):
 137         env['CCFLAGS'] += SCons.Util.CLVar(os.environ['CFLAGS'])
 138     if os.environ.has_key('CXX'):
 139         env['CXX'] = os.environ['CXX']
 140     if os.environ.has_key('CXXFLAGS'):
 141         env['CXXFLAGS'] += SCons.Util.CLVar(os.environ['CXXFLAGS'])
 142     if os.environ.has_key('LDFLAGS'):
 143         env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS'])
 144
 145     env['gcc'] = 'gcc' in os.path.basename(env['CC']).split('-')
 146     env['msvc'] = env['CC'] == 'cl'
 147
 148     if env['msvc'] and env['toolchain'] == 'default' and env['machine'] == 'x86_64':
 149         # MSVC x64 support is broken in earlier versions of scons
 150         env.EnsurePythonVersion(2, 0)
 151
 152     # shortcuts
 153     machine = env['machine']
 154     platform = env['platform']
 155     x86 = env['machine'] == 'x86'
 156     ppc = env['machine'] == 'ppc'
 157     gcc = env['gcc']
 158     msvc = env['msvc']
 159
 160     # Determine whether we are cross compiling; in particular, whether we need
 161     # to compile code generators with a different compiler as the target code.
 162     host_platform = _platform.system().lower()
 163     if host_platform.startswith('cygwin'):
 164         host_platform = 'cygwin'
 165     host_machine = os.environ.get('PROCESSOR_ARCHITEW6432', os.environ.get('PROCESSOR_ARCHITECTURE', _platform.machine()))
 166     host_machine = {
 167         'x86': 'x86',
 168         'i386': 'x86',
 169         'i486': 'x86',
 170         'i586': 'x86',
 171         'i686': 'x86',
 172         'ppc' : 'ppc',
 173         'AMD64': 'x86_64',
 174         'x86_64': 'x86_64',
 175     }.get(host_machine, 'generic')
 176     env['crosscompile'] = platform != host_platform
 177     if machine == 'x86_64' and host_machine != 'x86_64':
 178         env['crosscompile'] = True
 179     env['hostonly'] = False
 180
 181     # Backwards compatability with the debug= profile= options
 182     if env['build'] == 'debug':
 183         if not env['debug']:
 184             print 'scons: warning: debug option is deprecated and will be removed eventually; use instead'
 185             print
 186             print ' scons build=release'
 187             print
 188             env['build'] = 'release'
 189         if env['profile']:
 190             print 'scons: warning: profile option is deprecated and will be removed eventually; use instead'
 191             print
 192             print ' scons build=profile'
 193             print
 194             env['build'] = 'profile'
 195     if False:
 196         # Enforce SConscripts to use the new build variable
 197         env.popitem('debug')
 198         env.popitem('profile')
 199     else:
 200         # Backwards portability with older sconscripts
 201         if env['build'] in ('debug', 'checked'):
 202             env['debug'] = True
 203             env['profile'] = False
 204         if env['build'] == 'profile':
 205             env['debug'] = False
 206             env['profile'] = True
 207         if env['build'] == 'release':
 208             env['debug'] = False
 209             env['profile'] = False
 210
 211     # Put build output in a separate dir, which depends on the current
 212     # configuration. See also http://www.scons.org/wiki/AdvancedBuildExample
 213     build_topdir = 'build'
 214     build_subdir = env['platform']
 215     if env['embedded']:
 216         build_subdir =  'embedded-' + build_subdir
 217     if env['machine'] != 'generic':
 218         build_subdir += '-' + env['machine']
 219     if env['build'] != 'release':
 220         build_subdir += '-' +  env['build']
 221     build_dir = os.path.join(build_topdir, build_subdir)
 222     # Place the .sconsign file in the build dir too, to avoid issues with
 223     # different scons versions building the same source file
 224     env['build_dir'] = build_dir
 225     env.SConsignFile(os.path.join(build_dir, '.sconsign'))
 226     if 'SCONS_CACHE_DIR' in os.environ:
 227         print 'scons: Using build cache in %s.' % (os.environ['SCONS_CACHE_DIR'],)
 228         env.CacheDir(os.environ['SCONS_CACHE_DIR'])
 229     env['CONFIGUREDIR'] = os.path.join(build_dir, 'conf')
 230     env['CONFIGURELOG'] = os.path.join(os.path.abspath(build_dir), 'config.log')
 231
 232     # Parallel build
 233     if env.GetOption('num_jobs') <= 1:
 234         env.SetOption('num_jobs', num_jobs())
 235
 236     env.Decider('MD5-timestamp')
 237     env.SetOption('max_drift', 60)
 238
 239     # C preprocessor options
 240     cppdefines = []
 241     if env['build'] in ('debug', 'checked'):
 242         cppdefines += ['DEBUG']
 243     else:
 244         cppdefines += ['NDEBUG']
 245     if env['build'] == 'profile':
 246         cppdefines += ['PROFILE']
 247     if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
 248         cppdefines += [
 249             '_POSIX_SOURCE',
 250             ('_POSIX_C_SOURCE', '199309L'),
 251             '_SVID_SOURCE',
 252             '_BSD_SOURCE',
 253             '_GNU_SOURCE',
 254             'PTHREADS',
 255             'HAVE_POSIX_MEMALIGN',
 256         ]
 257         if env['platform'] == 'darwin':
 258             cppdefines += [
 259                 '_DARWIN_C_SOURCE',
 260                 'GLX_USE_APPLEGL',
 261                 'GLX_DIRECT_RENDERING',
 262             ]
 263         else:
 264             cppdefines += [
 265                 'GLX_DIRECT_RENDERING',
 266                 'GLX_INDIRECT_RENDERING',
 267             ]
 268         if env['platform'] in ('linux', 'freebsd'):
 269             cppdefines += ['HAVE_ALIAS']
 270         else:
 271             cppdefines += ['GLX_ALIAS_UNSUPPORTED']
 272     if platform == 'windows':
 273         cppdefines += [
 274             'WIN32',
 275             '_WINDOWS',
 276             #'_UNICODE',
 277             #'UNICODE',
 278             # http://msdn.microsoft.com/en-us/library/aa383745.aspx
 279             ('_WIN32_WINNT', '0x0601'),
 280             ('WINVER', '0x0601'),
 281         ]
 282         if msvc and env['toolchain'] != 'winddk':
 283             cppdefines += [
 284                 'VC_EXTRALEAN',
 285                 '_USE_MATH_DEFINES',
 286                 '_CRT_SECURE_NO_WARNINGS',
 287                 '_CRT_SECURE_NO_DEPRECATE',
 288                 '_SCL_SECURE_NO_WARNINGS',
 289                 '_SCL_SECURE_NO_DEPRECATE',
 290             ]
 291         if env['build'] in ('debug', 'checked'):
 292             cppdefines += ['_DEBUG']
 293     if env['toolchain'] == 'winddk':
 294         # Mimic WINDDK's builtin flags. See also:
 295         # - WINDDK's bin/makefile.new i386mk.inc for more info.
 296         # - buildchk_wxp_x86.log files, generated by the WINDDK's build
 297         # - http://alter.org.ua/docs/nt_kernel/vc8_proj/
 298         if machine == 'x86':
 299             cppdefines += ['_X86_', 'i386']
 300         if machine == 'x86_64':
 301             cppdefines += ['_AMD64_', 'AMD64']
 302     if platform == 'winddk':
 303         cppdefines += [
 304             'STD_CALL',
 305             ('CONDITION_HANDLING', '1'),
 306             ('NT_INST', '0'),
 307             ('WIN32', '100'),
 308             ('_NT1X_', '100'),
 309             ('WINNT', '1'),
 310             ('_WIN32_WINNT', '0x0501'), # minimum required OS version
 311             ('WINVER', '0x0501'),
 312             ('_WIN32_IE', '0x0603'),
 313             ('WIN32_LEAN_AND_MEAN', '1'),
 314             ('DEVL', '1'),
 315             ('__BUILDMACHINE__', 'WinDDK'),
 316             ('FPO', '0'),
 317         ]
 318         if env['build'] in ('debug', 'checked'):
 319             cppdefines += [('DBG', 1)]
 320     if platform == 'wince':
 321         cppdefines += [
 322             '_CRT_SECURE_NO_DEPRECATE',
 323             '_USE_32BIT_TIME_T',
 324             'UNICODE',
 325             '_UNICODE',
 326             ('UNDER_CE', '600'),
 327             ('_WIN32_WCE', '0x600'),
 328             'WINCEOEM',
 329             'WINCEINTERNAL',
 330             'WIN32',
 331             'STRICT',
 332             'x86',
 333             '_X86_',
 334             'INTERNATIONAL',
 335             ('INTLMSG_CODEPAGE', '1252'),
 336         ]
 337     if platform == 'windows':
 338         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER']
 339     if platform == 'winddk':
 340         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_DISPLAY']
 341     if platform == 'wince':
 342         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE']
 343         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE_OGL']
 344     if env['embedded']:
 345         cppdefines += ['PIPE_SUBSYSTEM_EMBEDDED']
 346     env.Append(CPPDEFINES = cppdefines)
 347
 348     # C compiler options
 349     cflags = [] # C
 350     cxxflags = [] # C++
 351     ccflags = [] # C & C++
 352     if gcc:
 353         ccversion = env['CCVERSION']
 354         if env['build'] == 'debug':
 355             ccflags += ['-O0']
 356         elif ccversion.startswith('4.2.'):
 357             # gcc 4.2.x optimizer is broken
 358             print "warning: gcc 4.2.x optimizer is broken -- disabling optimizations"
 359             ccflags += ['-O0']
 360         else:
 361             ccflags += ['-O3']
 362         # Work around aliasing bugs - developers should comment this out
 363         ccflags += ['-fno-strict-aliasing']
 364         ccflags += ['-g3']
 365         if env['build'] in ('checked', 'profile'):
 366             # See http://code.google.com/p/jrfonseca/wiki/Gprof2Dot#Which_options_should_I_pass_to_gcc_when_compiling_for_profiling?
 367             ccflags += [
 368                 '-fno-omit-frame-pointer',
 369                 '-fno-optimize-sibling-calls',
 370             ]
 371         if env['machine'] == 'x86':
 372             ccflags += [
 373                 '-m32',
 374                 #'-march=pentium4',
 375             ]
 376             if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2') \
 377                and (platform != 'windows' or env['build'] == 'debug' or True):
 378                 # NOTE: We need to ensure stack is realigned given that we
 379                 # produce shared objects, and have no control over the stack
 380                 # alignment policy of the application. Therefore we need
 381                 # -mstackrealign ore -mincoming-stack-boundary=2.
 382                 #
 383                 # XXX: -O and -mstackrealign causes stack corruption on MinGW
 384                 #
 385                 # XXX: We could have SSE without -mstackrealign if we always used
 386                 # __attribute__((force_align_arg_pointer)), but that's not
 387                 # always the case.
 388                 ccflags += [
 389                     '-mstackrealign', # ensure stack is aligned
 390                     '-mmmx', '-msse', '-msse2', # enable SIMD intrinsics
 391                     #'-mfpmath=sse',
 392                 ]
 393             if platform in ['windows', 'darwin']:
 394                 # Workaround http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216
 395                 ccflags += ['-fno-common']
 396         if env['machine'] == 'x86_64':
 397             ccflags += ['-m64']
 398             if platform == 'darwin':
 399                 ccflags += ['-fno-common']
 400         if env['platform'] != 'windows':
 401             ccflags += ['-fvisibility=hidden']
 402         # See also:
 403         # - http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
 404         ccflags += [
 405             '-Wall',
 406             '-Wno-long-long',
 407             '-ffast-math',
 408             '-fmessage-length=0', # be nice to Eclipse
 409         ]
 410         cflags += [
 411             '-Wmissing-prototypes',
 412             '-std=gnu99',
 413         ]
 414         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.0'):
 415             ccflags += [
 416                 '-Wmissing-field-initializers',
 417             ]
 418         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2'):
 419             ccflags += [
 420                 '-Wpointer-arith',
 421             ]
 422             cflags += [
 423                 '-Wdeclaration-after-statement',
 424             ]
 425     if msvc:
 426         # See also:
 427         # - http://msdn.microsoft.com/en-us/library/19z1t1wy.aspx
 428         # - cl /?
 429         if env['build'] == 'debug':
 430             ccflags += [
 431               '/Od', # disable optimizations
 432               '/Oi', # enable intrinsic functions
 433               '/Oy-', # disable frame pointer omission
 434             ]
 435         else:
 436             ccflags += [
 437                 '/O2', # optimize for speed
 438             ]
 439         if env['build'] == 'release':
 440             ccflags += [
 441                 '/GL', # enable whole program optimization
 442             ]
 443         else:
 444             ccflags += [
 445                 '/GL-', # disable whole program optimization
 446             ]
 447         ccflags += [
 448             '/fp:fast', # fast floating point
 449             '/W3', # warning level
 450             #'/Wp64', # enable 64 bit porting warnings
 451         ]
 452         if env['machine'] == 'x86':
 453             ccflags += [
 454                 #'/arch:SSE2', # use the SSE2 instructions
 455             ]
 456         if platform == 'windows':
 457             ccflags += [
 458                 # TODO
 459             ]
 460         if platform == 'winddk':
 461             ccflags += [
 462                 '/Zl', # omit default library name in .OBJ
 463                 '/Zp8', # 8bytes struct member alignment
 464                 '/Gy', # separate functions for linker
 465                 '/Gm-', # disable minimal rebuild
 466                 '/WX', # treat warnings as errors
 467                 '/Gz', # __stdcall Calling convention
 468                 '/GX-', # disable C++ EH
 469                 '/GR-', # disable C++ RTTI
 470                 '/GF', # enable read-only string pooling
 471                 '/G6', # optimize for PPro, P-II, P-III
 472                 '/Ze', # enable extensions
 473                 '/Gi-', # disable incremental compilation
 474                 '/QIfdiv-', # disable Pentium FDIV fix
 475                 '/hotpatch', # prepares an image for hotpatching.
 476                 #'/Z7', #enable old-style debug info
 477             ]
 478         if platform == 'wince':
 479             # See also C:\WINCE600\public\common\oak\misc\makefile.def
 480             ccflags += [
 481                 '/Zl', # omit default library name in .OBJ
 482                 '/GF', # enable read-only string pooling
 483                 '/GR-', # disable C++ RTTI
 484                 '/GS', # enable security checks
 485                 # Allow disabling language conformance to maintain backward compat
 486                 #'/Zc:wchar_t-', # don't force wchar_t as native type, instead of typedef
 487                 #'/Zc:forScope-', # don't enforce Standard C++ for scoping rules
 488                 #'/wd4867',
 489                 #'/wd4430',
 490                 #'/MT',
 491                 #'/U_MT',
 492             ]
 493         # Automatic pdb generation
 494         # See http://scons.tigris.org/issues/show_bug.cgi?id=1656
 495         env.EnsureSConsVersion(0, 98, 0)
 496         env['PDB'] = '${TARGET.base}.pdb'
 497     env.Append(CCFLAGS = ccflags)
 498     env.Append(CFLAGS = cflags)
 499     env.Append(CXXFLAGS = cxxflags)
 500
 501     if env['platform'] == 'windows' and msvc:
 502         # Choose the appropriate MSVC CRT
 503         # http://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
 504         if env['build'] in ('debug', 'checked'):
 505             env.Append(CCFLAGS = ['/MTd'])
 506             env.Append(SHCCFLAGS = ['/LDd'])
 507         else:
 508             env.Append(CCFLAGS = ['/MT'])
 509             env.Append(SHCCFLAGS = ['/LD'])
 510
 511     # Assembler options
 512     if gcc:
 513         if env['machine'] == 'x86':
 514             env.Append(ASFLAGS = ['-m32'])
 515         if env['machine'] == 'x86_64':
 516             env.Append(ASFLAGS = ['-m64'])
 517
 518     # Linker options
 519     linkflags = []
 520     shlinkflags = []
 521     if gcc:
 522         if env['machine'] == 'x86':
 523             linkflags += ['-m32']
 524         if env['machine'] == 'x86_64':
 525             linkflags += ['-m64']
 526         if env['platform'] not in ('darwin'):
 527             shlinkflags += [
 528                 '-Wl,-Bsymbolic',
 529             ]
 530         # Handle circular dependencies in the libraries
 531         if env['platform'] in ('darwin'):
 532             pass
 533         else:
 534             env['_LIBFLAGS'] = '-Wl,--start-group ' + env['_LIBFLAGS'] + ' -Wl,--end-group'
 535     if msvc:
 536         if env['build'] == 'release':
 537             # enable Link-time Code Generation
 538             linkflags += ['/LTCG']
 539             env.Append(ARFLAGS = ['/LTCG'])
 540     if platform == 'windows' and msvc:
 541         # See also:
 542         # - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
 543         linkflags += [
 544             '/fixed:no',
 545             '/incremental:no',
 546         ]
 547     if platform == 'winddk':
 548         linkflags += [
 549             '/merge:_PAGE=PAGE',
 550             '/merge:_TEXT=.text',
 551             '/section:INIT,d',
 552             '/opt:ref',
 553             '/opt:icf',
 554             '/ignore:4198,4010,4037,4039,4065,4070,4078,4087,4089,4221',
 555             '/incremental:no',
 556             '/fullbuild',
 557             '/release',
 558             '/nodefaultlib',
 559             '/wx',
 560             '/debug',
 561             '/debugtype:cv',
 562             '/version:5.1',
 563             '/osversion:5.1',
 564             '/functionpadmin:5',
 565             '/safeseh',
 566             '/pdbcompress',
 567             '/stack:0x40000,0x1000',
 568             '/driver',
 569             '/align:0x80',
 570             '/subsystem:native,5.01',
 571             '/base:0x10000',
 572
 573             '/entry:DrvEnableDriver',
 574         ]
 575         if env['build'] != 'release':
 576             linkflags += [
 577                 '/MAP', # http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx
 578             ]
 579     if platform == 'wince':
 580         linkflags += [
 581             '/nodefaultlib',
 582             #'/incremental:no',
 583             #'/fullbuild',
 584             '/entry:_DllMainCRTStartup',
 585         ]
 586     env.Append(LINKFLAGS = linkflags)
 587     env.Append(SHLINKFLAGS = shlinkflags)
 588
 589     # We have C++ in several libraries, so always link with the C++ compiler
 590     if env['gcc']:
 591         env['LINK'] = env['CXX']
 592
 593     # Default libs
 594     libs = []
 595     if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
 596         libs += ['m', 'pthread', 'dl']
 597     env.Append(LIBS = libs)
 598
 599     # Load tools
 600     env.Tool('lex')
 601     env.Tool('yacc')
 602     if env['llvm']:
 603         env.Tool('llvm')
 604
 605     # Custom builders and methods
 606     env.Tool('custom')
 607     createInstallMethods(env)
 608
 609     env.PkgCheckModules('X11', ['x11', 'xext', 'xdamage', 'xfixes'])
 610     env.PkgCheckModules('XF86VIDMODE', ['xxf86vm'])
 611     env.PkgCheckModules('DRM', ['libdrm'])
 612     env.PkgCheckModules('DRM_INTEL', ['libdrm_intel'])
 613     env.PkgCheckModules('DRM_RADEON', ['libdrm_radeon'])
 614     env.PkgCheckModules('XORG', ['xorg-server'])
 615     env.PkgCheckModules('KMS', ['libkms'])
 616     env.PkgCheckModules('UDEV', ['libudev'])
 617
 618     env['dri'] = env['x11'] and env['drm']
 619
 620     # for debugging
 621     #print env.Dump()
 622
 623
 624 def exists(env):
 625     return 1