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 gcc:
 283             cppdefines += [('__MSVCRT_VERSION__', '0x0700')]
 284         if msvc and env['toolchain'] != 'winddk':
 285             cppdefines += [
 286                 'VC_EXTRALEAN',
 287                 '_USE_MATH_DEFINES',
 288                 '_CRT_SECURE_NO_WARNINGS',
 289                 '_CRT_SECURE_NO_DEPRECATE',
 290                 '_SCL_SECURE_NO_WARNINGS',
 291                 '_SCL_SECURE_NO_DEPRECATE',
 292             ]
 293         if env['build'] in ('debug', 'checked'):
 294             cppdefines += ['_DEBUG']
 295     if env['toolchain'] == 'winddk':
 296         # Mimic WINDDK's builtin flags. See also:
 297         # - WINDDK's bin/makefile.new i386mk.inc for more info.
 298         # - buildchk_wxp_x86.log files, generated by the WINDDK's build
 299         # - http://alter.org.ua/docs/nt_kernel/vc8_proj/
 300         if machine == 'x86':
 301             cppdefines += ['_X86_', 'i386']
 302         if machine == 'x86_64':
 303             cppdefines += ['_AMD64_', 'AMD64']
 304     if platform == 'winddk':
 305         cppdefines += [
 306             'STD_CALL',
 307             ('CONDITION_HANDLING', '1'),
 308             ('NT_INST', '0'),
 309             ('WIN32', '100'),
 310             ('_NT1X_', '100'),
 311             ('WINNT', '1'),
 312             ('_WIN32_WINNT', '0x0501'), # minimum required OS version
 313             ('WINVER', '0x0501'),
 314             ('_WIN32_IE', '0x0603'),
 315             ('WIN32_LEAN_AND_MEAN', '1'),
 316             ('DEVL', '1'),
 317             ('__BUILDMACHINE__', 'WinDDK'),
 318             ('FPO', '0'),
 319         ]
 320         if env['build'] in ('debug', 'checked'):
 321             cppdefines += [('DBG', 1)]
 322     if platform == 'wince':
 323         cppdefines += [
 324             '_CRT_SECURE_NO_DEPRECATE',
 325             '_USE_32BIT_TIME_T',
 326             'UNICODE',
 327             '_UNICODE',
 328             ('UNDER_CE', '600'),
 329             ('_WIN32_WCE', '0x600'),
 330             'WINCEOEM',
 331             'WINCEINTERNAL',
 332             'WIN32',
 333             'STRICT',
 334             'x86',
 335             '_X86_',
 336             'INTERNATIONAL',
 337             ('INTLMSG_CODEPAGE', '1252'),
 338         ]
 339     if platform == 'windows':
 340         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER']
 341     if platform == 'winddk':
 342         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_DISPLAY']
 343     if platform == 'wince':
 344         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE']
 345         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE_OGL']
 346     if env['embedded']:
 347         cppdefines += ['PIPE_SUBSYSTEM_EMBEDDED']
 348     env.Append(CPPDEFINES = cppdefines)
 349
 350     # C compiler options
 351     cflags = [] # C
 352     cxxflags = [] # C++
 353     ccflags = [] # C & C++
 354     if gcc:
 355         ccversion = env['CCVERSION']
 356         if env['build'] == 'debug':
 357             ccflags += ['-O0']
 358         elif ccversion.startswith('4.2.'):
 359             # gcc 4.2.x optimizer is broken
 360             print "warning: gcc 4.2.x optimizer is broken -- disabling optimizations"
 361             ccflags += ['-O0']
 362         else:
 363             ccflags += ['-O3']
 364         # Work around aliasing bugs - developers should comment this out
 365         ccflags += ['-fno-strict-aliasing']
 366         ccflags += ['-g3']
 367         if env['build'] in ('checked', 'profile'):
 368             # See http://code.google.com/p/jrfonseca/wiki/Gprof2Dot#Which_options_should_I_pass_to_gcc_when_compiling_for_profiling?
 369             ccflags += [
 370                 '-fno-omit-frame-pointer',
 371                 '-fno-optimize-sibling-calls',
 372             ]
 373         if env['machine'] == 'x86':
 374             ccflags += [
 375                 '-m32',
 376                 #'-march=pentium4',
 377             ]
 378             if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2') \
 379                and (platform != 'windows' or env['build'] == 'debug' or True):
 380                 # NOTE: We need to ensure stack is realigned given that we
 381                 # produce shared objects, and have no control over the stack
 382                 # alignment policy of the application. Therefore we need
 383                 # -mstackrealign ore -mincoming-stack-boundary=2.
 384                 #
 385                 # XXX: -O and -mstackrealign causes stack corruption on MinGW
 386                 #
 387                 # XXX: We could have SSE without -mstackrealign if we always used
 388                 # __attribute__((force_align_arg_pointer)), but that's not
 389                 # always the case.
 390                 ccflags += [
 391                     '-mstackrealign', # ensure stack is aligned
 392                     '-mmmx', '-msse', '-msse2', # enable SIMD intrinsics
 393                     #'-mfpmath=sse',
 394                 ]
 395             if platform in ['windows', 'darwin']:
 396                 # Workaround http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216
 397                 ccflags += ['-fno-common']
 398         if env['machine'] == 'x86_64':
 399             ccflags += ['-m64']
 400             if platform == 'darwin':
 401                 ccflags += ['-fno-common']
 402         if env['platform'] != 'windows':
 403             ccflags += ['-fvisibility=hidden']
 404         # See also:
 405         # - http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
 406         ccflags += [
 407             '-Wall',
 408             '-Wno-long-long',
 409             '-ffast-math',
 410             '-fmessage-length=0', # be nice to Eclipse
 411         ]
 412         cflags += [
 413             '-Wmissing-prototypes',
 414             '-std=gnu99',
 415         ]
 416         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.0'):
 417             ccflags += [
 418                 '-Wmissing-field-initializers',
 419             ]
 420         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2'):
 421             ccflags += [
 422                 '-Wpointer-arith',
 423             ]
 424             cflags += [
 425                 '-Wdeclaration-after-statement',
 426             ]
 427     if msvc:
 428         # See also:
 429         # - http://msdn.microsoft.com/en-us/library/19z1t1wy.aspx
 430         # - cl /?
 431         if env['build'] == 'debug':
 432             ccflags += [
 433               '/Od', # disable optimizations
 434               '/Oi', # enable intrinsic functions
 435               '/Oy-', # disable frame pointer omission
 436             ]
 437         else:
 438             ccflags += [
 439                 '/O2', # optimize for speed
 440             ]
 441         if env['build'] == 'release':
 442             ccflags += [
 443                 '/GL', # enable whole program optimization
 444             ]
 445         else:
 446             ccflags += [
 447                 '/GL-', # disable whole program optimization
 448             ]
 449         ccflags += [
 450             '/fp:fast', # fast floating point
 451             '/W3', # warning level
 452             #'/Wp64', # enable 64 bit porting warnings
 453         ]
 454         if env['machine'] == 'x86':
 455             ccflags += [
 456                 #'/arch:SSE2', # use the SSE2 instructions
 457             ]
 458         if platform == 'windows':
 459             ccflags += [
 460                 # TODO
 461             ]
 462         if platform == 'winddk':
 463             ccflags += [
 464                 '/Zl', # omit default library name in .OBJ
 465                 '/Zp8', # 8bytes struct member alignment
 466                 '/Gy', # separate functions for linker
 467                 '/Gm-', # disable minimal rebuild
 468                 '/WX', # treat warnings as errors
 469                 '/Gz', # __stdcall Calling convention
 470                 '/GX-', # disable C++ EH
 471                 '/GR-', # disable C++ RTTI
 472                 '/GF', # enable read-only string pooling
 473                 '/G6', # optimize for PPro, P-II, P-III
 474                 '/Ze', # enable extensions
 475                 '/Gi-', # disable incremental compilation
 476                 '/QIfdiv-', # disable Pentium FDIV fix
 477                 '/hotpatch', # prepares an image for hotpatching.
 478                 #'/Z7', #enable old-style debug info
 479             ]
 480         if platform == 'wince':
 481             # See also C:\WINCE600\public\common\oak\misc\makefile.def
 482             ccflags += [
 483                 '/Zl', # omit default library name in .OBJ
 484                 '/GF', # enable read-only string pooling
 485                 '/GR-', # disable C++ RTTI
 486                 '/GS', # enable security checks
 487                 # Allow disabling language conformance to maintain backward compat
 488                 #'/Zc:wchar_t-', # don't force wchar_t as native type, instead of typedef
 489                 #'/Zc:forScope-', # don't enforce Standard C++ for scoping rules
 490                 #'/wd4867',
 491                 #'/wd4430',
 492                 #'/MT',
 493                 #'/U_MT',
 494             ]
 495         # Automatic pdb generation
 496         # See http://scons.tigris.org/issues/show_bug.cgi?id=1656
 497         env.EnsureSConsVersion(0, 98, 0)
 498         env['PDB'] = '${TARGET.base}.pdb'
 499     env.Append(CCFLAGS = ccflags)
 500     env.Append(CFLAGS = cflags)
 501     env.Append(CXXFLAGS = cxxflags)
 502
 503     if env['platform'] == 'windows' and msvc:
 504         # Choose the appropriate MSVC CRT
 505         # http://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
 506         if env['build'] in ('debug', 'checked'):
 507             env.Append(CCFLAGS = ['/MTd'])
 508             env.Append(SHCCFLAGS = ['/LDd'])
 509         else:
 510             env.Append(CCFLAGS = ['/MT'])
 511             env.Append(SHCCFLAGS = ['/LD'])
 512
 513     # Assembler options
 514     if gcc:
 515         if env['machine'] == 'x86':
 516             env.Append(ASFLAGS = ['-m32'])
 517         if env['machine'] == 'x86_64':
 518             env.Append(ASFLAGS = ['-m64'])
 519
 520     # Linker options
 521     linkflags = []
 522     shlinkflags = []
 523     if gcc:
 524         if env['machine'] == 'x86':
 525             linkflags += ['-m32']
 526         if env['machine'] == 'x86_64':
 527             linkflags += ['-m64']
 528         if env['platform'] not in ('darwin'):
 529             shlinkflags += [
 530                 '-Wl,-Bsymbolic',
 531             ]
 532         # Handle circular dependencies in the libraries
 533         if env['platform'] in ('darwin'):
 534             pass
 535         else:
 536             env['_LIBFLAGS'] = '-Wl,--start-group ' + env['_LIBFLAGS'] + ' -Wl,--end-group'
 537         if env['platform'] == 'windows':
 538             # Avoid depending on gcc runtime DLLs
 539             linkflags += ['-static-libgcc']
 540             # Handle the @xx symbol munging of DLL exports
 541             shlinkflags += ['-Wl,--enable-stdcall-fixup']
 542             #shlinkflags += ['-Wl,--kill-at']
 543     if msvc:
 544         if env['build'] == 'release':
 545             # enable Link-time Code Generation
 546             linkflags += ['/LTCG']
 547             env.Append(ARFLAGS = ['/LTCG'])
 548     if platform == 'windows' and msvc:
 549         # See also:
 550         # - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
 551         linkflags += [
 552             '/fixed:no',
 553             '/incremental:no',
 554         ]
 555     if platform == 'winddk':
 556         linkflags += [
 557             '/merge:_PAGE=PAGE',
 558             '/merge:_TEXT=.text',
 559             '/section:INIT,d',
 560             '/opt:ref',
 561             '/opt:icf',
 562             '/ignore:4198,4010,4037,4039,4065,4070,4078,4087,4089,4221',
 563             '/incremental:no',
 564             '/fullbuild',
 565             '/release',
 566             '/nodefaultlib',
 567             '/wx',
 568             '/debug',
 569             '/debugtype:cv',
 570             '/version:5.1',
 571             '/osversion:5.1',
 572             '/functionpadmin:5',
 573             '/safeseh',
 574             '/pdbcompress',
 575             '/stack:0x40000,0x1000',
 576             '/driver',
 577             '/align:0x80',
 578             '/subsystem:native,5.01',
 579             '/base:0x10000',
 580
 581             '/entry:DrvEnableDriver',
 582         ]
 583         if env['build'] != 'release':
 584             linkflags += [
 585                 '/MAP', # http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx
 586             ]
 587     if platform == 'wince':
 588         linkflags += [
 589             '/nodefaultlib',
 590             #'/incremental:no',
 591             #'/fullbuild',
 592             '/entry:_DllMainCRTStartup',
 593         ]
 594     env.Append(LINKFLAGS = linkflags)
 595     env.Append(SHLINKFLAGS = shlinkflags)
 596
 597     # We have C++ in several libraries, so always link with the C++ compiler
 598     if env['gcc']:
 599         env['LINK'] = env['CXX']
 600
 601     # Default libs
 602     libs = []
 603     if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
 604         libs += ['m', 'pthread', 'dl']
 605     env.Append(LIBS = libs)
 606
 607     # OpenMP
 608     if env['openmp']:
 609         if env['msvc']:
 610             env.Append(CCFLAGS = ['/openmp'])
 611             # When building openmp release VS2008 link.exe crashes with LNK1103 error.
 612             # Workaround: overwrite PDB flags with empty value as it isn't required anyways
 613             if env['build'] == 'release':
 614                 env['PDB'] = ''
 615         if env['gcc']:
 616             env.Append(CCFLAGS = ['-fopenmp'])
 617             env.Append(LIBS = ['gomp'])
 618
 619     # Load tools
 620     env.Tool('lex')
 621     env.Tool('yacc')
 622     if env['llvm']:
 623         env.Tool('llvm')
 624
 625     # Custom builders and methods
 626     env.Tool('custom')
 627     createInstallMethods(env)
 628
 629     env.PkgCheckModules('X11', ['x11', 'xext', 'xdamage', 'xfixes'])
 630     env.PkgCheckModules('XF86VIDMODE', ['xxf86vm'])
 631     env.PkgCheckModules('DRM', ['libdrm'])
 632     env.PkgCheckModules('DRM_INTEL', ['libdrm_intel'])
 633     env.PkgCheckModules('DRM_RADEON', ['libdrm_radeon'])
 634     env.PkgCheckModules('XORG', ['xorg-server'])
 635     env.PkgCheckModules('KMS', ['libkms'])
 636     env.PkgCheckModules('UDEV', ['libudev'])
 637
 638     env['dri'] = env['x11'] and env['drm']
 639
 640     # for debugging
 641     #print env.Dump()
 642
 643
 644 def exists(env):
 645     return 1