scons/gallium.py

   1 """gallium
   2
   3 Frontend-tool for Gallium3D architecture.
   4
   5 """
   6
   7 #
   8 # Copyright 2008 VMware, Inc.
   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 VMWARE 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 import sys
  40 import tempfile
  41
  42 import SCons.Action
  43 import SCons.Builder
  44 import SCons.Scanner
  45
  46
  47 def symlink(target, source, env):
  48     target = str(target[0])
  49     source = str(source[0])
  50     if os.path.islink(target) or os.path.exists(target):
  51         os.remove(target)
  52     os.symlink(os.path.basename(source), target)
  53
  54 def install(env, source, subdir):
  55     target_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'], subdir)
  56     return env.Install(target_dir, source)
  57
  58 def install_program(env, source):
  59     return install(env, source, 'bin')
  60
  61 def install_shared_library(env, sources, version = ()):
  62     targets = []
  63     install_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'])
  64     version = tuple(map(str, version))
  65     if env['SHLIBSUFFIX'] == '.dll':
  66         dlls = env.FindIxes(sources, 'SHLIBPREFIX', 'SHLIBSUFFIX')
  67         targets += install(env, dlls, 'bin')
  68         libs = env.FindIxes(sources, 'LIBPREFIX', 'LIBSUFFIX')
  69         targets += install(env, libs, 'lib')
  70     else:
  71         for source in sources:
  72             target_dir =  os.path.join(install_dir, 'lib')
  73             target_name = '.'.join((str(source),) + version)
  74             last = env.InstallAs(os.path.join(target_dir, target_name), source)
  75             targets += last
  76             while len(version):
  77                 version = version[:-1]
  78                 target_name = '.'.join((str(source),) + version)
  79                 action = SCons.Action.Action(symlink, "  Symlinking $TARGET ...")
  80                 last = env.Command(os.path.join(target_dir, target_name), last, action)
  81                 targets += last
  82     return targets
  83
  84
  85 def createInstallMethods(env):
  86     env.AddMethod(install_program, 'InstallProgram')
  87     env.AddMethod(install_shared_library, 'InstallSharedLibrary')
  88
  89
  90 def num_jobs():
  91     try:
  92         return int(os.environ['NUMBER_OF_PROCESSORS'])
  93     except (ValueError, KeyError):
  94         pass
  95
  96     try:
  97         return os.sysconf('SC_NPROCESSORS_ONLN')
  98     except (ValueError, OSError, AttributeError):
  99         pass
 100
 101     try:
 102         return int(os.popen2("sysctl -n hw.ncpu")[1].read())
 103     except ValueError:
 104         pass
 105
 106     return 1
 107
 108
 109 def check_cc(env, cc, expr, cpp_opt = '-E'):
 110     # Invoke C-preprocessor to determine whether the specified expression is
 111     # true or not.
 112
 113     sys.stdout.write('Checking for %s ... ' % cc)
 114
 115     source = tempfile.NamedTemporaryFile(suffix='.c', delete=False)
 116     source.write('#if !(%s)\n#error\n#endif\n' % expr)
 117     source.close()
 118
 119     pipe = SCons.Action._subproc(env, [env['CC'], cpp_opt, source.name],
 120                                  stdin = 'devnull',
 121                                  stderr = 'devnull',
 122                                  stdout = 'devnull')
 123     result = pipe.wait() == 0
 124
 125     os.unlink(source.name)
 126
 127     sys.stdout.write(' %s\n' % ['no', 'yes'][int(bool(result))])
 128     return result
 129
 130
 131 def generate(env):
 132     """Common environment generation code"""
 133
 134     # Tell tools which machine to compile for
 135     env['TARGET_ARCH'] = env['machine']
 136     env['MSVS_ARCH'] = env['machine']
 137
 138     # Toolchain
 139     platform = env['platform']
 140     env.Tool(env['toolchain'])
 141
 142     # Allow override compiler and specify additional flags from environment
 143     if os.environ.has_key('CC'):
 144         env['CC'] = os.environ['CC']
 145         # Update CCVERSION to match
 146         pipe = SCons.Action._subproc(env, [env['CC'], '--version'],
 147                                      stdin = 'devnull',
 148                                      stderr = 'devnull',
 149                                      stdout = subprocess.PIPE)
 150         if pipe.wait() == 0:
 151             line = pipe.stdout.readline()
 152             match = re.search(r'[0-9]+(\.[0-9]+)+', line)
 153             if match:
 154                 env['CCVERSION'] = match.group(0)
 155     if os.environ.has_key('CFLAGS'):
 156         env['CCFLAGS'] += SCons.Util.CLVar(os.environ['CFLAGS'])
 157     if os.environ.has_key('CXX'):
 158         env['CXX'] = os.environ['CXX']
 159     if os.environ.has_key('CXXFLAGS'):
 160         env['CXXFLAGS'] += SCons.Util.CLVar(os.environ['CXXFLAGS'])
 161     if os.environ.has_key('LDFLAGS'):
 162         env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS'])
 163
 164     # Detect gcc/clang not by executable name, but through pre-defined macros
 165     # as autoconf does, to avoid drawing wrong conclusions when using tools
 166     # that overrice CC/CXX like scan-build.
 167     env['gcc'] = 0
 168     env['clang'] = 0
 169     env['msvc'] = 0
 170     if _platform.system() == 'Windows':
 171         env['msvc'] = check_cc(env, 'MSVC', 'defined(_MSC_VER)', '/E')
 172     if not env['msvc']:
 173         env['gcc'] = check_cc(env, 'GCC', 'defined(__GNUC__) && !defined(__clang__)')
 174         env['clang'] = check_cc(env, 'Clang', '__clang__')
 175     env['suncc'] = env['platform'] == 'sunos' and os.path.basename(env['CC']) == 'cc'
 176     env['icc'] = 'icc' == os.path.basename(env['CC'])
 177
 178     if env['msvc'] and env['toolchain'] == 'default' and env['machine'] == 'x86_64':
 179         # MSVC x64 support is broken in earlier versions of scons
 180         env.EnsurePythonVersion(2, 0)
 181
 182     # shortcuts
 183     machine = env['machine']
 184     platform = env['platform']
 185     x86 = env['machine'] == 'x86'
 186     ppc = env['machine'] == 'ppc'
 187     gcc_compat = env['gcc'] or env['clang']
 188     msvc = env['msvc']
 189     suncc = env['suncc']
 190     icc = env['icc']
 191
 192     # Determine whether we are cross compiling; in particular, whether we need
 193     # to compile code generators with a different compiler as the target code.
 194     host_platform = _platform.system().lower()
 195     if host_platform.startswith('cygwin'):
 196         host_platform = 'cygwin'
 197     host_machine = os.environ.get('PROCESSOR_ARCHITEW6432', os.environ.get('PROCESSOR_ARCHITECTURE', _platform.machine()))
 198     host_machine = {
 199         'x86': 'x86',
 200         'i386': 'x86',
 201         'i486': 'x86',
 202         'i586': 'x86',
 203         'i686': 'x86',
 204         'ppc' : 'ppc',
 205         'AMD64': 'x86_64',
 206         'x86_64': 'x86_64',
 207     }.get(host_machine, 'generic')
 208     env['crosscompile'] = platform != host_platform
 209     if machine == 'x86_64' and host_machine != 'x86_64':
 210         env['crosscompile'] = True
 211     env['hostonly'] = False
 212
 213     # Backwards compatability with the debug= profile= options
 214     if env['build'] == 'debug':
 215         if not env['debug']:
 216             print 'scons: warning: debug option is deprecated and will be removed eventually; use instead'
 217             print
 218             print ' scons build=release'
 219             print
 220             env['build'] = 'release'
 221         if env['profile']:
 222             print 'scons: warning: profile option is deprecated and will be removed eventually; use instead'
 223             print
 224             print ' scons build=profile'
 225             print
 226             env['build'] = 'profile'
 227     if False:
 228         # Enforce SConscripts to use the new build variable
 229         env.popitem('debug')
 230         env.popitem('profile')
 231     else:
 232         # Backwards portability with older sconscripts
 233         if env['build'] in ('debug', 'checked'):
 234             env['debug'] = True
 235             env['profile'] = False
 236         if env['build'] == 'profile':
 237             env['debug'] = False
 238             env['profile'] = True
 239         if env['build'] == 'release':
 240             env['debug'] = False
 241             env['profile'] = False
 242
 243     # Put build output in a separate dir, which depends on the current
 244     # configuration. See also http://www.scons.org/wiki/AdvancedBuildExample
 245     build_topdir = 'build'
 246     build_subdir = env['platform']
 247     if env['embedded']:
 248         build_subdir =  'embedded-' + build_subdir
 249     if env['machine'] != 'generic':
 250         build_subdir += '-' + env['machine']
 251     if env['build'] != 'release':
 252         build_subdir += '-' +  env['build']
 253     build_dir = os.path.join(build_topdir, build_subdir)
 254     # Place the .sconsign file in the build dir too, to avoid issues with
 255     # different scons versions building the same source file
 256     env['build_dir'] = build_dir
 257     env.SConsignFile(os.path.join(build_dir, '.sconsign'))
 258     if 'SCONS_CACHE_DIR' in os.environ:
 259         print 'scons: Using build cache in %s.' % (os.environ['SCONS_CACHE_DIR'],)
 260         env.CacheDir(os.environ['SCONS_CACHE_DIR'])
 261     env['CONFIGUREDIR'] = os.path.join(build_dir, 'conf')
 262     env['CONFIGURELOG'] = os.path.join(os.path.abspath(build_dir), 'config.log')
 263
 264     # Parallel build
 265     if env.GetOption('num_jobs') <= 1:
 266         env.SetOption('num_jobs', num_jobs())
 267
 268     env.Decider('MD5-timestamp')
 269     env.SetOption('max_drift', 60)
 270
 271     # C preprocessor options
 272     cppdefines = []
 273     if env['build'] in ('debug', 'checked'):
 274         cppdefines += ['DEBUG']
 275     else:
 276         cppdefines += ['NDEBUG']
 277     if env['build'] == 'profile':
 278         cppdefines += ['PROFILE']
 279     if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
 280         cppdefines += [
 281             '_POSIX_SOURCE',
 282             ('_POSIX_C_SOURCE', '199309L'),
 283             '_SVID_SOURCE',
 284             '_BSD_SOURCE',
 285             '_GNU_SOURCE',
 286             'HAVE_PTHREAD',
 287             'HAVE_POSIX_MEMALIGN',
 288         ]
 289         if env['platform'] == 'darwin':
 290             cppdefines += [
 291                 '_DARWIN_C_SOURCE',
 292                 'GLX_USE_APPLEGL',
 293                 'GLX_DIRECT_RENDERING',
 294             ]
 295         else:
 296             cppdefines += [
 297                 'GLX_DIRECT_RENDERING',
 298                 'GLX_INDIRECT_RENDERING',
 299             ]
 300         if env['platform'] in ('linux', 'freebsd'):
 301             cppdefines += ['HAVE_ALIAS']
 302         else:
 303             cppdefines += ['GLX_ALIAS_UNSUPPORTED']
 304
 305         if env['platform'] in ('linux', 'darwin'):
 306             cppdefines += ['HAVE_XLOCALE_H']
 307
 308     if env['platform'] == 'haiku':
 309         cppdefines += [
 310             'HAVE_PTHREAD',
 311             'HAVE_POSIX_MEMALIGN'
 312         ]
 313     if platform == 'windows':
 314         cppdefines += [
 315             'WIN32',
 316             '_WINDOWS',
 317             #'_UNICODE',
 318             #'UNICODE',
 319             # http://msdn.microsoft.com/en-us/library/aa383745.aspx
 320             ('_WIN32_WINNT', '0x0601'),
 321             ('WINVER', '0x0601'),
 322         ]
 323         if gcc_compat:
 324             cppdefines += [('__MSVCRT_VERSION__', '0x0700')]
 325         if msvc:
 326             cppdefines += [
 327                 'VC_EXTRALEAN',
 328                 '_USE_MATH_DEFINES',
 329                 '_CRT_SECURE_NO_WARNINGS',
 330                 '_CRT_SECURE_NO_DEPRECATE',
 331                 '_SCL_SECURE_NO_WARNINGS',
 332                 '_SCL_SECURE_NO_DEPRECATE',
 333                 '_ALLOW_KEYWORD_MACROS',
 334             ]
 335         if env['build'] in ('debug', 'checked'):
 336             cppdefines += ['_DEBUG']
 337     if platform == 'windows':
 338         cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER']
 339     if env['embedded']:
 340         cppdefines += ['PIPE_SUBSYSTEM_EMBEDDED']
 341     if env['texture_float']:
 342         print 'warning: Floating-point textures enabled.'
 343         print 'warning: Please consult docs/patents.txt with your lawyer before building Mesa.'
 344         cppdefines += ['TEXTURE_FLOAT_ENABLED']
 345     env.Append(CPPDEFINES = cppdefines)
 346
 347     # C compiler options
 348     cflags = [] # C
 349     cxxflags = [] # C++
 350     ccflags = [] # C & C++
 351     if gcc_compat:
 352         ccversion = env['CCVERSION']
 353         if env['build'] == 'debug':
 354             ccflags += ['-O0']
 355         elif env['gcc'] and ccversion.startswith('4.2.'):
 356             # gcc 4.2.x optimizer is broken
 357             print "warning: gcc 4.2.x optimizer is broken -- disabling optimizations"
 358             ccflags += ['-O0']
 359         else:
 360             ccflags += ['-O3']
 361         if env['gcc']:
 362             # gcc's builtin memcmp is slower than glibc's
 363             # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052
 364             ccflags += ['-fno-builtin-memcmp']
 365         # Work around aliasing bugs - developers should comment this out
 366         ccflags += ['-fno-strict-aliasing']
 367         ccflags += ['-g']
 368         if env['build'] in ('checked', 'profile'):
 369             # See http://code.google.com/p/jrfonseca/wiki/Gprof2Dot#Which_options_should_I_pass_to_gcc_when_compiling_for_profiling?
 370             ccflags += [
 371                 '-fno-omit-frame-pointer',
 372             ]
 373             if env['gcc']:
 374                 ccflags += ['-fno-optimize-sibling-calls']
 375         if env['machine'] == 'x86':
 376             ccflags += [
 377                 '-m32',
 378                 #'-march=pentium4',
 379             ]
 380             if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2') \
 381                and platform != 'haiku':
 382                 # NOTE: We need to ensure stack is realigned given that we
 383                 # produce shared objects, and have no control over the stack
 384                 # alignment policy of the application. Therefore we need
 385                 # -mstackrealign ore -mincoming-stack-boundary=2.
 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                     '-msse', '-msse2', # enable SIMD intrinsics
 393                     '-mfpmath=sse', # generate SSE floating-point arithmetic
 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 platform in ['haiku']:
 399                 # Make optimizations compatible with Pentium or higher on Haiku
 400                 ccflags += [
 401                     '-mstackrealign', # ensure stack is aligned
 402                     '-march=i586', # Haiku target is Pentium
 403                     '-mtune=i686' # use i686 where we can
 404                 ]
 405         if env['machine'] == 'x86_64':
 406             ccflags += ['-m64']
 407             if platform == 'darwin':
 408                 ccflags += ['-fno-common']
 409         if env['platform'] not in ('cygwin', 'haiku', 'windows'):
 410             ccflags += ['-fvisibility=hidden']
 411         # See also:
 412         # - http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
 413         ccflags += [
 414             '-Wall',
 415             '-Wno-long-long',
 416             '-fmessage-length=0', # be nice to Eclipse
 417         ]
 418         cflags += [
 419             '-Wmissing-prototypes',
 420             '-std=gnu99',
 421         ]
 422         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2'):
 423             ccflags += [
 424                 '-Wpointer-arith',
 425             ]
 426             cflags += [
 427                 '-Wdeclaration-after-statement',
 428             ]
 429     if icc:
 430         cflags += [
 431             '-std=gnu99',
 432         ]
 433     if msvc:
 434         # See also:
 435         # - http://msdn.microsoft.com/en-us/library/19z1t1wy.aspx
 436         # - cl /?
 437         if 'MSVC_VERSION' not in env or distutils.version.LooseVersion(env['MSVC_VERSION']) < distutils.version.LooseVersion('12.0'):
 438             # Use bundled stdbool.h and stdint.h headers for older MSVC
 439             # versions.  stdint.h was introduced in MSVC 2010, but stdbool.h
 440             # was only introduced in MSVC 2013.
 441             top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
 442             env.Append(CPPPATH = [os.path.join(top_dir, 'include/c99')])
 443         if env['build'] == 'debug':
 444             ccflags += [
 445               '/Od', # disable optimizations
 446               '/Oi', # enable intrinsic functions
 447             ]
 448         else:
 449             if 'MSVC_VERSION' in env and distutils.version.LooseVersion(env['MSVC_VERSION']) < distutils.version.LooseVersion('11.0'):
 450                 print 'scons: warning: Visual Studio versions prior to 2012 are known to produce incorrect code when optimizations are enabled ( https://bugs.freedesktop.org/show_bug.cgi?id=58718 )'
 451             ccflags += [
 452                 '/O2', # optimize for speed
 453             ]
 454         if env['build'] == 'release':
 455             ccflags += [
 456                 '/GL', # enable whole program optimization
 457             ]
 458         else:
 459             ccflags += [
 460                 '/Oy-', # disable frame pointer omission
 461                 '/GL-', # disable whole program optimization
 462             ]
 463         ccflags += [
 464             '/W3', # warning level
 465             '/wd4244', # conversion from 'type1' to 'type2', possible loss of data
 466             '/wd4305', # truncation from 'type1' to 'type2'
 467             '/wd4800', # forcing value to bool 'true' or 'false' (performance warning)
 468             '/wd4996', # disable deprecated POSIX name warnings
 469         ]
 470         if env['machine'] == 'x86':
 471             ccflags += [
 472                 '/arch:SSE2', # use the SSE2 instructions (default since MSVC 2012)
 473             ]
 474         if platform == 'windows':
 475             ccflags += [
 476                 # TODO
 477             ]
 478         # Automatic pdb generation
 479         # See http://scons.tigris.org/issues/show_bug.cgi?id=1656
 480         env.EnsureSConsVersion(0, 98, 0)
 481         env['PDB'] = '${TARGET.base}.pdb'
 482     env.Append(CCFLAGS = ccflags)
 483     env.Append(CFLAGS = cflags)
 484     env.Append(CXXFLAGS = cxxflags)
 485
 486     if env['platform'] == 'windows' and msvc:
 487         # Choose the appropriate MSVC CRT
 488         # http://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
 489         if env['build'] in ('debug', 'checked'):
 490             env.Append(CCFLAGS = ['/MTd'])
 491             env.Append(SHCCFLAGS = ['/LDd'])
 492         else:
 493             env.Append(CCFLAGS = ['/MT'])
 494             env.Append(SHCCFLAGS = ['/LD'])
 495
 496     # Static code analysis
 497     if env['analyze']:
 498         if env['msvc']:
 499             # http://msdn.microsoft.com/en-us/library/ms173498.aspx
 500             env.Append(CCFLAGS = [
 501                 '/analyze',
 502                 #'/analyze:log', '${TARGET.base}.xml',
 503             ])
 504         if env['clang']:
 505             # scan-build will produce more comprehensive output
 506             env.Append(CCFLAGS = ['--analyze'])
 507
 508     # Assembler options
 509     if gcc_compat:
 510         if env['machine'] == 'x86':
 511             env.Append(ASFLAGS = ['-m32'])
 512         if env['machine'] == 'x86_64':
 513             env.Append(ASFLAGS = ['-m64'])
 514
 515     # Linker options
 516     linkflags = []
 517     shlinkflags = []
 518     if gcc_compat:
 519         if env['machine'] == 'x86':
 520             linkflags += ['-m32']
 521         if env['machine'] == 'x86_64':
 522             linkflags += ['-m64']
 523         if env['platform'] not in ('darwin'):
 524             shlinkflags += [
 525                 '-Wl,-Bsymbolic',
 526             ]
 527         # Handle circular dependencies in the libraries
 528         if env['platform'] in ('darwin'):
 529             pass
 530         else:
 531             env['_LIBFLAGS'] = '-Wl,--start-group ' + env['_LIBFLAGS'] + ' -Wl,--end-group'
 532         if env['platform'] == 'windows':
 533             linkflags += [
 534                 '-Wl,--nxcompat', # DEP
 535                 '-Wl,--dynamicbase', # ASLR
 536             ]
 537             # Avoid depending on gcc runtime DLLs
 538             linkflags += ['-static-libgcc']
 539             if 'w64' in env['CC'].split('-'):
 540                 linkflags += ['-static-libstdc++']
 541             # Handle the @xx symbol munging of DLL exports
 542             shlinkflags += ['-Wl,--enable-stdcall-fixup']
 543             #shlinkflags += ['-Wl,--kill-at']
 544     if msvc:
 545         if env['build'] == 'release':
 546             # enable Link-time Code Generation
 547             linkflags += ['/LTCG']
 548             env.Append(ARFLAGS = ['/LTCG'])
 549     if platform == 'windows' and msvc:
 550         # See also:
 551         # - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
 552         linkflags += [
 553             '/fixed:no',
 554             '/incremental:no',
 555             '/dynamicbase', # ASLR
 556             '/nxcompat', # DEP
 557         ]
 558     env.Append(LINKFLAGS = linkflags)
 559     env.Append(SHLINKFLAGS = shlinkflags)
 560
 561     # We have C++ in several libraries, so always link with the C++ compiler
 562     if gcc_compat:
 563         env['LINK'] = env['CXX']
 564
 565     # Default libs
 566     libs = []
 567     if env['platform'] in ('darwin', 'freebsd', 'linux', 'posix', 'sunos'):
 568         libs += ['m', 'pthread', 'dl']
 569     if env['platform'] in ('linux',):
 570         libs += ['rt']
 571     if env['platform'] in ('haiku'):
 572         libs += ['root', 'be', 'network', 'translation']
 573     env.Append(LIBS = libs)
 574
 575     # OpenMP
 576     if env['openmp']:
 577         if env['msvc']:
 578             env.Append(CCFLAGS = ['/openmp'])
 579             # When building openmp release VS2008 link.exe crashes with LNK1103 error.
 580             # Workaround: overwrite PDB flags with empty value as it isn't required anyways
 581             if env['build'] == 'release':
 582                 env['PDB'] = ''
 583         if env['gcc']:
 584             env.Append(CCFLAGS = ['-fopenmp'])
 585             env.Append(LIBS = ['gomp'])
 586
 587     if gcc_compat:
 588         ccversion = env['CCVERSION']
 589         cppdefines += [
 590             'HAVE___BUILTIN_EXPECT',
 591             'HAVE___BUILTIN_FFS',
 592             'HAVE___BUILTIN_FFSLL',
 593             'HAVE_FUNC_ATTRIBUTE_FLATTEN',
 594         ]
 595         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('3'):
 596             cppdefines += [
 597                 'HAVE_FUNC_ATTRIBUTE_FORMAT',
 598                 'HAVE_FUNC_ATTRIBUTE_PACKED',
 599             ]
 600         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('3.4'):
 601             cppdefines += [
 602                 'HAVE___BUILTIN_CTZ',
 603                 'HAVE___BUILTIN_POPCOUNT',
 604                 'HAVE___BUILTIN_POPCOUNTLL',
 605                 'HAVE___BUILTIN_CLZ',
 606                 'HAVE___BUILTIN_CLZLL',
 607             ]
 608         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.5'):
 609             cppdefines += ['HAVE___BUILTIN_UNREACHABLE']
 610
 611     # Load tools
 612     env.Tool('lex')
 613     env.Tool('yacc')
 614     if env['llvm']:
 615         env.Tool('llvm')
 616
 617     # Custom builders and methods
 618     env.Tool('custom')
 619     createInstallMethods(env)
 620
 621     env.PkgCheckModules('X11', ['x11', 'xext', 'xdamage', 'xfixes', 'glproto >= 1.4.13'])
 622     env.PkgCheckModules('XCB', ['x11-xcb', 'xcb-glx >= 1.8.1', 'xcb-dri2 >= 1.8'])
 623     env.PkgCheckModules('XF86VIDMODE', ['xxf86vm'])
 624     env.PkgCheckModules('DRM', ['libdrm >= 2.4.38'])
 625     env.PkgCheckModules('UDEV', ['libudev >= 151'])
 626
 627     if env['x11']:
 628         env.Append(CPPPATH = env['X11_CPPPATH'])
 629
 630     env['dri'] = env['x11'] and env['drm']
 631
 632     # for debugging
 633     #print env.Dump()
 634
 635
 636 def exists(env):
 637     return 1