Synchronised line endinge with release branch

1 files changed, 647 insertions, 647 deletions

diff --git a/mesalib/scons/gallium.py b/mesalib/scons/gallium.py
index 28e505460..1c9c0ea32 100644
--- a/mesalib/scons/gallium.py
+++ b/mesalib/scons/gallium.py
@@ -1,647 +1,647 @@
-"""gallium

-

-Frontend-tool for Gallium3D architecture.

-

-"""

-

-#

-# Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.

-# All Rights Reserved.

-#

-# Permission is hereby granted, free of charge, to any person obtaining a

-# copy of this software and associated documentation files (the

-# "Software"), to deal in the Software without restriction, including

-# without limitation the rights to use, copy, modify, merge, publish,

-# distribute, sub license, and/or sell copies of the Software, and to

-# permit persons to whom the Software is furnished to do so, subject to

-# the following conditions:

-#

-# The above copyright notice and this permission notice (including the

-# next paragraph) shall be included in all copies or substantial portions

-# of the Software.

-#

-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

-# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.

-# IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR

-# ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

-# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

-# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

-#

-

-

-import distutils.version

-import os

-import os.path

-import re

-import subprocess

-import platform as _platform

-

-import SCons.Action

-import SCons.Builder

-import SCons.Scanner

-

-

-def symlink(target, source, env):

-    target = str(target[0])

-    source = str(source[0])

-    if os.path.islink(target) or os.path.exists(target):

-        os.remove(target)

-    os.symlink(os.path.basename(source), target)

-

-def install(env, source, subdir):

-    target_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'], subdir)

-    return env.Install(target_dir, source)

-

-def install_program(env, source):

-    return install(env, source, 'bin')

-

-def install_shared_library(env, sources, version = ()):

-    targets = []

-    install_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'])

-    version = tuple(map(str, version))

-    if env['SHLIBSUFFIX'] == '.dll':

-        dlls = env.FindIxes(sources, 'SHLIBPREFIX', 'SHLIBSUFFIX')

-        targets += install(env, dlls, 'bin')

-        libs = env.FindIxes(sources, 'LIBPREFIX', 'LIBSUFFIX')

-        targets += install(env, libs, 'lib')

-    else:

-        for source in sources:

-            target_dir =  os.path.join(install_dir, 'lib')

-            target_name = '.'.join((str(source),) + version)

-            last = env.InstallAs(os.path.join(target_dir, target_name), source)

-            targets += last

-            while len(version):

-                version = version[:-1]

-                target_name = '.'.join((str(source),) + version)

-                action = SCons.Action.Action(symlink, "  Symlinking $TARGET ...")

-                last = env.Command(os.path.join(target_dir, target_name), last, action) 

-                targets += last

-    return targets

-

-

-def createInstallMethods(env):

-    env.AddMethod(install_program, 'InstallProgram')

-    env.AddMethod(install_shared_library, 'InstallSharedLibrary')

-

-

-def num_jobs():

-    try:

-        return int(os.environ['NUMBER_OF_PROCESSORS'])

-    except (ValueError, KeyError):

-        pass

-

-    try:

-        return os.sysconf('SC_NPROCESSORS_ONLN')

-    except (ValueError, OSError, AttributeError):

-        pass

-

-    try:

-        return int(os.popen2("sysctl -n hw.ncpu")[1].read())

-    except ValueError:

-        pass

-

-    return 1

-

-

-def generate(env):

-    """Common environment generation code"""

-

-    # Tell tools which machine to compile for

-    env['TARGET_ARCH'] = env['machine']

-    env['MSVS_ARCH'] = env['machine']

-

-    # Toolchain

-    platform = env['platform']

-    if env['toolchain'] == 'default':

-        if platform == 'winddk':

-            env['toolchain'] = 'winddk'

-        elif platform == 'wince':

-            env['toolchain'] = 'wcesdk'

-    env.Tool(env['toolchain'])

-

-    # Allow override compiler and specify additional flags from environment

-    if os.environ.has_key('CC'):

-        env['CC'] = os.environ['CC']

-        # Update CCVERSION to match

-        pipe = SCons.Action._subproc(env, [env['CC'], '--version'],

-                                     stdin = 'devnull',

-                                     stderr = 'devnull',

-                                     stdout = subprocess.PIPE)

-        if pipe.wait() == 0:

-            line = pipe.stdout.readline()

-            match = re.search(r'[0-9]+(\.[0-9]+)+', line)

-            if match:

-                env['CCVERSION'] = match.group(0)

-    if os.environ.has_key('CFLAGS'):

-        env['CCFLAGS'] += SCons.Util.CLVar(os.environ['CFLAGS'])

-    if os.environ.has_key('CXX'):

-        env['CXX'] = os.environ['CXX']

-    if os.environ.has_key('CXXFLAGS'):

-        env['CXXFLAGS'] += SCons.Util.CLVar(os.environ['CXXFLAGS'])

-    if os.environ.has_key('LDFLAGS'):

-        env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS'])

-

-    env['gcc'] = 'gcc' in os.path.basename(env['CC']).split('-')

-    env['msvc'] = env['CC'] == 'cl'

-

-    if env['msvc'] and env['toolchain'] == 'default' and env['machine'] == 'x86_64':

-        # MSVC x64 support is broken in earlier versions of scons

-        env.EnsurePythonVersion(2, 0)

-

-    # shortcuts

-    machine = env['machine']

-    platform = env['platform']

-    x86 = env['machine'] == 'x86'

-    ppc = env['machine'] == 'ppc'

-    gcc = env['gcc']

-    msvc = env['msvc']

-

-    # Determine whether we are cross compiling; in particular, whether we need

-    # to compile code generators with a different compiler as the target code.

-    host_platform = _platform.system().lower()

-    if host_platform.startswith('cygwin'):

-        host_platform = 'cygwin'

-    host_machine = os.environ.get('PROCESSOR_ARCHITEW6432', os.environ.get('PROCESSOR_ARCHITECTURE', _platform.machine()))

-    host_machine = {

-        'x86': 'x86',

-        'i386': 'x86',

-        'i486': 'x86',

-        'i586': 'x86',

-        'i686': 'x86',

-        'ppc' : 'ppc',

-        'AMD64': 'x86_64',

-        'x86_64': 'x86_64',

-    }.get(host_machine, 'generic')

-    env['crosscompile'] = platform != host_platform

-    if machine == 'x86_64' and host_machine != 'x86_64':

-        env['crosscompile'] = True

-    env['hostonly'] = False

-

-    # Backwards compatability with the debug= profile= options

-    if env['build'] == 'debug':

-        if not env['debug']:

-            print 'scons: warning: debug option is deprecated and will be removed eventually; use instead'

-            print

-            print ' scons build=release'

-            print

-            env['build'] = 'release'

-        if env['profile']:

-            print 'scons: warning: profile option is deprecated and will be removed eventually; use instead'

-            print

-            print ' scons build=profile'

-            print

-            env['build'] = 'profile'

-    if False:

-        # Enforce SConscripts to use the new build variable

-        env.popitem('debug')

-        env.popitem('profile')

-    else:

-        # Backwards portability with older sconscripts

-        if env['build'] in ('debug', 'checked'):

-            env['debug'] = True

-            env['profile'] = False

-        if env['build'] == 'profile':

-            env['debug'] = False

-            env['profile'] = True

-        if env['build'] == 'release':

-            env['debug'] = False

-            env['profile'] = False

-

-    # Put build output in a separate dir, which depends on the current

-    # configuration. See also http://www.scons.org/wiki/AdvancedBuildExample

-    build_topdir = 'build'

-    build_subdir = env['platform']

-    if env['embedded']:

-        build_subdir =  'embedded-' + build_subdir

-    if env['machine'] != 'generic':

-        build_subdir += '-' + env['machine']

-    if env['build'] != 'release':

-        build_subdir += '-' +  env['build']

-    build_dir = os.path.join(build_topdir, build_subdir)

-    # Place the .sconsign file in the build dir too, to avoid issues with

-    # different scons versions building the same source file

-    env['build_dir'] = build_dir

-    env.SConsignFile(os.path.join(build_dir, '.sconsign'))

-    if 'SCONS_CACHE_DIR' in os.environ:

-        print 'scons: Using build cache in %s.' % (os.environ['SCONS_CACHE_DIR'],)

-        env.CacheDir(os.environ['SCONS_CACHE_DIR'])

-    env['CONFIGUREDIR'] = os.path.join(build_dir, 'conf')

-    env['CONFIGURELOG'] = os.path.join(os.path.abspath(build_dir), 'config.log')

-

-    # Parallel build

-    if env.GetOption('num_jobs') <= 1:

-        env.SetOption('num_jobs', num_jobs())

-

-    env.Decider('MD5-timestamp')

-    env.SetOption('max_drift', 60)

-

-    # C preprocessor options

-    cppdefines = []

-    if env['build'] in ('debug', 'checked'):

-        cppdefines += ['DEBUG']

-    else:

-        cppdefines += ['NDEBUG']

-    if env['build'] == 'profile':

-        cppdefines += ['PROFILE']

-    if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):

-        cppdefines += [

-            '_POSIX_SOURCE',

-            ('_POSIX_C_SOURCE', '199309L'),

-            '_SVID_SOURCE',

-            '_BSD_SOURCE',

-            '_GNU_SOURCE',

-            'PTHREADS',

-            'HAVE_POSIX_MEMALIGN',

-        ]

-        if env['platform'] == 'darwin':

-            cppdefines += [

-                '_DARWIN_C_SOURCE',

-                'GLX_USE_APPLEGL',

-                'GLX_DIRECT_RENDERING',

-            ]

-        else:

-            cppdefines += [

-                'GLX_DIRECT_RENDERING',

-                'GLX_INDIRECT_RENDERING',

-            ]

-        if env['platform'] in ('linux', 'freebsd'):

-            cppdefines += ['HAVE_ALIAS']

-        else:

-            cppdefines += ['GLX_ALIAS_UNSUPPORTED']

-    if platform == 'windows':

-        cppdefines += [

-            'WIN32',

-            '_WINDOWS',

-            #'_UNICODE',

-            #'UNICODE',

-            # http://msdn.microsoft.com/en-us/library/aa383745.aspx

-            ('_WIN32_WINNT', '0x0601'),

-            ('WINVER', '0x0601'),

-        ]

-        if gcc:

-            cppdefines += [('__MSVCRT_VERSION__', '0x0700')]

-        if msvc and env['toolchain'] != 'winddk':

-            cppdefines += [

-                'VC_EXTRALEAN',

-                '_USE_MATH_DEFINES',

-                '_CRT_SECURE_NO_WARNINGS',

-                '_CRT_SECURE_NO_DEPRECATE',

-                '_SCL_SECURE_NO_WARNINGS',

-                '_SCL_SECURE_NO_DEPRECATE',

-            ]

-        if env['build'] in ('debug', 'checked'):

-            cppdefines += ['_DEBUG']

-    if env['toolchain'] == 'winddk':

-        # Mimic WINDDK's builtin flags. See also:

-        # - WINDDK's bin/makefile.new i386mk.inc for more info.

-        # - buildchk_wxp_x86.log files, generated by the WINDDK's build

-        # - http://alter.org.ua/docs/nt_kernel/vc8_proj/

-        if machine == 'x86':

-            cppdefines += ['_X86_', 'i386']

-        if machine == 'x86_64':

-            cppdefines += ['_AMD64_', 'AMD64']

-    if platform == 'winddk':

-        cppdefines += [

-            'STD_CALL',

-            ('CONDITION_HANDLING', '1'),

-            ('NT_INST', '0'),

-            ('WIN32', '100'),

-            ('_NT1X_', '100'),

-            ('WINNT', '1'),

-            ('_WIN32_WINNT', '0x0501'), # minimum required OS version

-            ('WINVER', '0x0501'),

-            ('_WIN32_IE', '0x0603'),

-            ('WIN32_LEAN_AND_MEAN', '1'),

-            ('DEVL', '1'),

-            ('__BUILDMACHINE__', 'WinDDK'),

-            ('FPO', '0'),

-        ]

-        if env['build'] in ('debug', 'checked'):

-            cppdefines += [('DBG', 1)]

-    if platform == 'wince':

-        cppdefines += [

-            '_CRT_SECURE_NO_DEPRECATE',

-            '_USE_32BIT_TIME_T',

-            'UNICODE',

-            '_UNICODE',

-            ('UNDER_CE', '600'),

-            ('_WIN32_WCE', '0x600'),

-            'WINCEOEM',

-            'WINCEINTERNAL',

-            'WIN32',

-            'STRICT',

-            'x86',

-            '_X86_',

-            'INTERNATIONAL',

-            ('INTLMSG_CODEPAGE', '1252'),

-        ]

-    if platform == 'windows':

-        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER']

-    if platform == 'winddk':

-        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_DISPLAY']

-    if platform == 'wince':

-        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE']

-        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE_OGL']

-    if env['embedded']:

-        cppdefines += ['PIPE_SUBSYSTEM_EMBEDDED']

-    env.Append(CPPDEFINES = cppdefines)

-

-    # C compiler options

-    cflags = [] # C

-    cxxflags = [] # C++

-    ccflags = [] # C & C++

-    if gcc:

-        ccversion = env['CCVERSION']

-        if env['build'] == 'debug':

-            ccflags += ['-O0']

-        elif ccversion.startswith('4.2.'):

-            # gcc 4.2.x optimizer is broken

-            print "warning: gcc 4.2.x optimizer is broken -- disabling optimizations"

-            ccflags += ['-O0']

-        else:

-            ccflags += ['-O3']

-        # Work around aliasing bugs - developers should comment this out

-        ccflags += ['-fno-strict-aliasing']

-        ccflags += ['-g']

-        if env['build'] in ('checked', 'profile'):

-            # See http://code.google.com/p/jrfonseca/wiki/Gprof2Dot#Which_options_should_I_pass_to_gcc_when_compiling_for_profiling?

-            ccflags += [

-                '-fno-omit-frame-pointer',

-                '-fno-optimize-sibling-calls',

-            ]

-        if env['machine'] == 'x86':

-            ccflags += [

-                '-m32',

-                #'-march=pentium4',

-            ]

-            if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2') \

-               and (platform != 'windows' or env['build'] == 'debug' or True):

-                # NOTE: We need to ensure stack is realigned given that we

-                # produce shared objects, and have no control over the stack

-                # alignment policy of the application. Therefore we need

-                # -mstackrealign ore -mincoming-stack-boundary=2.

-                #

-                # XXX: -O and -mstackrealign causes stack corruption on MinGW

-                #

-                # XXX: We could have SSE without -mstackrealign if we always used

-                # __attribute__((force_align_arg_pointer)), but that's not

-                # always the case.

-                ccflags += [

-                    '-mstackrealign', # ensure stack is aligned

-                    '-mmmx', '-msse', '-msse2', # enable SIMD intrinsics

-                    #'-mfpmath=sse',

-                ]

-            if platform in ['windows', 'darwin']:

-                # Workaround http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216

-                ccflags += ['-fno-common']

-        if env['machine'] == 'x86_64':

-            ccflags += ['-m64']

-            if platform == 'darwin':

-                ccflags += ['-fno-common']

-        if env['platform'] != 'windows':

-            ccflags += ['-fvisibility=hidden']

-        # See also:

-        # - http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

-        ccflags += [

-            '-Wall',

-            '-Wno-long-long',

-            '-ffast-math',

-            '-fmessage-length=0', # be nice to Eclipse

-        ]

-        cflags += [

-            '-Wmissing-prototypes',

-            '-std=gnu99',

-        ]

-        if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.0'):

-            ccflags += [

-                '-Wmissing-field-initializers',

-            ]

-        if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2'):

-            ccflags += [

-                '-Wpointer-arith',

-            ]

-            cflags += [

-                '-Wdeclaration-after-statement',

-            ]

-    if msvc:

-        # See also:

-        # - http://msdn.microsoft.com/en-us/library/19z1t1wy.aspx

-        # - cl /?

-        if env['build'] == 'debug':

-            ccflags += [

-              '/Od', # disable optimizations

-              '/Oi', # enable intrinsic functions

-              '/Oy-', # disable frame pointer omission

-            ]

-        else:

-            ccflags += [

-                '/O2', # optimize for speed

-            ]

-        if env['build'] == 'release':

-            ccflags += [

-                '/GL', # enable whole program optimization

-            ]

-        else:

-            ccflags += [

-                '/GL-', # disable whole program optimization

-            ]

-        ccflags += [

-            '/fp:fast', # fast floating point 

-            '/W3', # warning level

-            #'/Wp64', # enable 64 bit porting warnings

-        ]

-        if env['machine'] == 'x86':

-            ccflags += [

-                #'/arch:SSE2', # use the SSE2 instructions

-            ]

-        if platform == 'windows':

-            ccflags += [

-                # TODO

-            ]

-        if platform == 'winddk':

-            ccflags += [

-                '/Zl', # omit default library name in .OBJ

-                '/Zp8', # 8bytes struct member alignment

-                '/Gy', # separate functions for linker

-                '/Gm-', # disable minimal rebuild

-                '/WX', # treat warnings as errors

-                '/Gz', # __stdcall Calling convention

-                '/GX-', # disable C++ EH

-                '/GR-', # disable C++ RTTI

-                '/GF', # enable read-only string pooling

-                '/G6', # optimize for PPro, P-II, P-III

-                '/Ze', # enable extensions

-                '/Gi-', # disable incremental compilation

-                '/QIfdiv-', # disable Pentium FDIV fix

-                '/hotpatch', # prepares an image for hotpatching.

-                #'/Z7', #enable old-style debug info

-            ]

-        if platform == 'wince':

-            # See also C:\WINCE600\public\common\oak\misc\makefile.def

-            ccflags += [

-                '/Zl', # omit default library name in .OBJ

-                '/GF', # enable read-only string pooling

-                '/GR-', # disable C++ RTTI

-                '/GS', # enable security checks

-                # Allow disabling language conformance to maintain backward compat

-                #'/Zc:wchar_t-', # don't force wchar_t as native type, instead of typedef

-                #'/Zc:forScope-', # don't enforce Standard C++ for scoping rules

-                #'/wd4867',

-                #'/wd4430',

-                #'/MT',

-                #'/U_MT',

-            ]

-        # Automatic pdb generation

-        # See http://scons.tigris.org/issues/show_bug.cgi?id=1656

-        env.EnsureSConsVersion(0, 98, 0)

-        env['PDB'] = '${TARGET.base}.pdb'

-    env.Append(CCFLAGS = ccflags)

-    env.Append(CFLAGS = cflags)

-    env.Append(CXXFLAGS = cxxflags)

-

-    if env['platform'] == 'windows' and msvc:

-        # Choose the appropriate MSVC CRT

-        # http://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx

-        if env['build'] in ('debug', 'checked'):

-            env.Append(CCFLAGS = ['/MTd'])

-            env.Append(SHCCFLAGS = ['/LDd'])

-        else:

-            env.Append(CCFLAGS = ['/MT'])

-            env.Append(SHCCFLAGS = ['/LD'])

-    

-    # Assembler options

-    if gcc:

-        if env['machine'] == 'x86':

-            env.Append(ASFLAGS = ['-m32'])

-        if env['machine'] == 'x86_64':

-            env.Append(ASFLAGS = ['-m64'])

-

-    # Linker options

-    linkflags = []

-    shlinkflags = []

-    if gcc:

-        if env['machine'] == 'x86':

-            linkflags += ['-m32']

-        if env['machine'] == 'x86_64':

-            linkflags += ['-m64']

-        if env['platform'] not in ('darwin'):

-            shlinkflags += [

-                '-Wl,-Bsymbolic',

-            ]

-        # Handle circular dependencies in the libraries

-        if env['platform'] in ('darwin'):

-            pass

-        else:

-            env['_LIBFLAGS'] = '-Wl,--start-group ' + env['_LIBFLAGS'] + ' -Wl,--end-group'

-        if env['platform'] == 'windows':

-            # Avoid depending on gcc runtime DLLs

-            linkflags += ['-static-libgcc']

-            if env['machine'] == 'x86_64':

-                linkflags += ['-static-libstdc++']

-            # Handle the @xx symbol munging of DLL exports

-            shlinkflags += ['-Wl,--enable-stdcall-fixup']

-            #shlinkflags += ['-Wl,--kill-at']

-    if msvc:

-        if env['build'] == 'release':

-            # enable Link-time Code Generation

-            linkflags += ['/LTCG']

-            env.Append(ARFLAGS = ['/LTCG'])

-    if platform == 'windows' and msvc:

-        # See also:

-        # - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx

-        linkflags += [

-            '/fixed:no',

-            '/incremental:no',

-        ]

-    if platform == 'winddk':

-        linkflags += [

-            '/merge:_PAGE=PAGE',

-            '/merge:_TEXT=.text',

-            '/section:INIT,d',

-            '/opt:ref',

-            '/opt:icf',

-            '/ignore:4198,4010,4037,4039,4065,4070,4078,4087,4089,4221',

-            '/incremental:no',

-            '/fullbuild',

-            '/release',

-            '/nodefaultlib',

-            '/wx',

-            '/debug',

-            '/debugtype:cv',

-            '/version:5.1',

-            '/osversion:5.1',

-            '/functionpadmin:5',

-            '/safeseh',

-            '/pdbcompress',

-            '/stack:0x40000,0x1000',

-            '/driver',

-            '/align:0x80',

-            '/subsystem:native,5.01',

-            '/base:0x10000',

-

-            '/entry:DrvEnableDriver',

-        ]

-        if env['build'] != 'release':

-            linkflags += [

-                '/MAP', # http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx

-            ]

-    if platform == 'wince':

-        linkflags += [

-            '/nodefaultlib',

-            #'/incremental:no',

-            #'/fullbuild',

-            '/entry:_DllMainCRTStartup',

-        ]

-    env.Append(LINKFLAGS = linkflags)

-    env.Append(SHLINKFLAGS = shlinkflags)

-

-    # We have C++ in several libraries, so always link with the C++ compiler

-    if env['gcc']:

-        env['LINK'] = env['CXX']

-

-    # Default libs

-    libs = []

-    if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):

-        libs += ['m', 'pthread', 'dl']

-    env.Append(LIBS = libs)

-

-    # OpenMP

-    if env['openmp']:

-        if env['msvc']:

-            env.Append(CCFLAGS = ['/openmp'])

-            # When building openmp release VS2008 link.exe crashes with LNK1103 error.

-            # Workaround: overwrite PDB flags with empty value as it isn't required anyways

-            if env['build'] == 'release':

-                env['PDB'] = ''

-        if env['gcc']:

-            env.Append(CCFLAGS = ['-fopenmp'])

-            env.Append(LIBS = ['gomp'])

-

-    # Load tools

-    env.Tool('lex')

-    env.Tool('yacc')

-    if env['llvm']:

-        env.Tool('llvm')

-    

-    # Custom builders and methods

-    env.Tool('custom')

-    createInstallMethods(env)

-

-    env.PkgCheckModules('X11', ['x11', 'xext', 'xdamage', 'xfixes'])

-    env.PkgCheckModules('XF86VIDMODE', ['xxf86vm'])

-    env.PkgCheckModules('DRM', ['libdrm'])

-    env.PkgCheckModules('DRM_INTEL', ['libdrm_intel'])

-    env.PkgCheckModules('DRM_RADEON', ['libdrm_radeon'])

-    env.PkgCheckModules('XORG', ['xorg-server'])

-    env.PkgCheckModules('KMS', ['libkms'])

-    env.PkgCheckModules('UDEV', ['libudev'])

-

-    env['dri'] = env['x11'] and env['drm']

-

-    # for debugging

-    #print env.Dump()

-

-

-def exists(env):

-    return 1

+"""gallium
+
+Frontend-tool for Gallium3D architecture.
+
+"""
+
+#
+# Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+# All Rights Reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sub license, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice (including the
+# next paragraph) shall be included in all copies or substantial portions
+# of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+# IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+# ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+
+import distutils.version
+import os
+import os.path
+import re
+import subprocess
+import platform as _platform
+
+import SCons.Action
+import SCons.Builder
+import SCons.Scanner
+
+
+def symlink(target, source, env):
+    target = str(target[0])
+    source = str(source[0])
+    if os.path.islink(target) or os.path.exists(target):
+        os.remove(target)
+    os.symlink(os.path.basename(source), target)
+
+def install(env, source, subdir):
+    target_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'], subdir)
+    return env.Install(target_dir, source)
+
+def install_program(env, source):
+    return install(env, source, 'bin')
+
+def install_shared_library(env, sources, version = ()):
+    targets = []
+    install_dir = os.path.join(env.Dir('#.').srcnode().abspath, env['build_dir'])
+    version = tuple(map(str, version))
+    if env['SHLIBSUFFIX'] == '.dll':
+        dlls = env.FindIxes(sources, 'SHLIBPREFIX', 'SHLIBSUFFIX')
+        targets += install(env, dlls, 'bin')
+        libs = env.FindIxes(sources, 'LIBPREFIX', 'LIBSUFFIX')
+        targets += install(env, libs, 'lib')
+    else:
+        for source in sources:
+            target_dir =  os.path.join(install_dir, 'lib')
+            target_name = '.'.join((str(source),) + version)
+            last = env.InstallAs(os.path.join(target_dir, target_name), source)
+            targets += last
+            while len(version):
+                version = version[:-1]
+                target_name = '.'.join((str(source),) + version)
+                action = SCons.Action.Action(symlink, "  Symlinking $TARGET ...")
+                last = env.Command(os.path.join(target_dir, target_name), last, action) 
+                targets += last
+    return targets
+
+
+def createInstallMethods(env):
+    env.AddMethod(install_program, 'InstallProgram')
+    env.AddMethod(install_shared_library, 'InstallSharedLibrary')
+
+
+def num_jobs():
+    try:
+        return int(os.environ['NUMBER_OF_PROCESSORS'])
+    except (ValueError, KeyError):
+        pass
+
+    try:
+        return os.sysconf('SC_NPROCESSORS_ONLN')
+    except (ValueError, OSError, AttributeError):
+        pass
+
+    try:
+        return int(os.popen2("sysctl -n hw.ncpu")[1].read())
+    except ValueError:
+        pass
+
+    return 1
+
+
+def generate(env):
+    """Common environment generation code"""
+
+    # Tell tools which machine to compile for
+    env['TARGET_ARCH'] = env['machine']
+    env['MSVS_ARCH'] = env['machine']
+
+    # Toolchain
+    platform = env['platform']
+    if env['toolchain'] == 'default':
+        if platform == 'winddk':
+            env['toolchain'] = 'winddk'
+        elif platform == 'wince':
+            env['toolchain'] = 'wcesdk'
+    env.Tool(env['toolchain'])
+
+    # Allow override compiler and specify additional flags from environment
+    if os.environ.has_key('CC'):
+        env['CC'] = os.environ['CC']
+        # Update CCVERSION to match
+        pipe = SCons.Action._subproc(env, [env['CC'], '--version'],
+                                     stdin = 'devnull',
+                                     stderr = 'devnull',
+                                     stdout = subprocess.PIPE)
+        if pipe.wait() == 0:
+            line = pipe.stdout.readline()
+            match = re.search(r'[0-9]+(\.[0-9]+)+', line)
+            if match:
+                env['CCVERSION'] = match.group(0)
+    if os.environ.has_key('CFLAGS'):
+        env['CCFLAGS'] += SCons.Util.CLVar(os.environ['CFLAGS'])
+    if os.environ.has_key('CXX'):
+        env['CXX'] = os.environ['CXX']
+    if os.environ.has_key('CXXFLAGS'):
+        env['CXXFLAGS'] += SCons.Util.CLVar(os.environ['CXXFLAGS'])
+    if os.environ.has_key('LDFLAGS'):
+        env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS'])
+
+    env['gcc'] = 'gcc' in os.path.basename(env['CC']).split('-')
+    env['msvc'] = env['CC'] == 'cl'
+
+    if env['msvc'] and env['toolchain'] == 'default' and env['machine'] == 'x86_64':
+        # MSVC x64 support is broken in earlier versions of scons
+        env.EnsurePythonVersion(2, 0)
+
+    # shortcuts
+    machine = env['machine']
+    platform = env['platform']
+    x86 = env['machine'] == 'x86'
+    ppc = env['machine'] == 'ppc'
+    gcc = env['gcc']
+    msvc = env['msvc']
+
+    # Determine whether we are cross compiling; in particular, whether we need
+    # to compile code generators with a different compiler as the target code.
+    host_platform = _platform.system().lower()
+    if host_platform.startswith('cygwin'):
+        host_platform = 'cygwin'
+    host_machine = os.environ.get('PROCESSOR_ARCHITEW6432', os.environ.get('PROCESSOR_ARCHITECTURE', _platform.machine()))
+    host_machine = {
+        'x86': 'x86',
+        'i386': 'x86',
+        'i486': 'x86',
+        'i586': 'x86',
+        'i686': 'x86',
+        'ppc' : 'ppc',
+        'AMD64': 'x86_64',
+        'x86_64': 'x86_64',
+    }.get(host_machine, 'generic')
+    env['crosscompile'] = platform != host_platform
+    if machine == 'x86_64' and host_machine != 'x86_64':
+        env['crosscompile'] = True
+    env['hostonly'] = False
+
+    # Backwards compatability with the debug= profile= options
+    if env['build'] == 'debug':
+        if not env['debug']:
+            print 'scons: warning: debug option is deprecated and will be removed eventually; use instead'
+            print
+            print ' scons build=release'
+            print
+            env['build'] = 'release'
+        if env['profile']:
+            print 'scons: warning: profile option is deprecated and will be removed eventually; use instead'
+            print
+            print ' scons build=profile'
+            print
+            env['build'] = 'profile'
+    if False:
+        # Enforce SConscripts to use the new build variable
+        env.popitem('debug')
+        env.popitem('profile')
+    else:
+        # Backwards portability with older sconscripts
+        if env['build'] in ('debug', 'checked'):
+            env['debug'] = True
+            env['profile'] = False
+        if env['build'] == 'profile':
+            env['debug'] = False
+            env['profile'] = True
+        if env['build'] == 'release':
+            env['debug'] = False
+            env['profile'] = False
+
+    # Put build output in a separate dir, which depends on the current
+    # configuration. See also http://www.scons.org/wiki/AdvancedBuildExample
+    build_topdir = 'build'
+    build_subdir = env['platform']
+    if env['embedded']:
+        build_subdir =  'embedded-' + build_subdir
+    if env['machine'] != 'generic':
+        build_subdir += '-' + env['machine']
+    if env['build'] != 'release':
+        build_subdir += '-' +  env['build']
+    build_dir = os.path.join(build_topdir, build_subdir)
+    # Place the .sconsign file in the build dir too, to avoid issues with
+    # different scons versions building the same source file
+    env['build_dir'] = build_dir
+    env.SConsignFile(os.path.join(build_dir, '.sconsign'))
+    if 'SCONS_CACHE_DIR' in os.environ:
+        print 'scons: Using build cache in %s.' % (os.environ['SCONS_CACHE_DIR'],)
+        env.CacheDir(os.environ['SCONS_CACHE_DIR'])
+    env['CONFIGUREDIR'] = os.path.join(build_dir, 'conf')
+    env['CONFIGURELOG'] = os.path.join(os.path.abspath(build_dir), 'config.log')
+
+    # Parallel build
+    if env.GetOption('num_jobs') <= 1:
+        env.SetOption('num_jobs', num_jobs())
+
+    env.Decider('MD5-timestamp')
+    env.SetOption('max_drift', 60)
+
+    # C preprocessor options
+    cppdefines = []
+    if env['build'] in ('debug', 'checked'):
+        cppdefines += ['DEBUG']
+    else:
+        cppdefines += ['NDEBUG']
+    if env['build'] == 'profile':
+        cppdefines += ['PROFILE']
+    if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
+        cppdefines += [
+            '_POSIX_SOURCE',
+            ('_POSIX_C_SOURCE', '199309L'),
+            '_SVID_SOURCE',
+            '_BSD_SOURCE',
+            '_GNU_SOURCE',
+            'PTHREADS',
+            'HAVE_POSIX_MEMALIGN',
+        ]
+        if env['platform'] == 'darwin':
+            cppdefines += [
+                '_DARWIN_C_SOURCE',
+                'GLX_USE_APPLEGL',
+                'GLX_DIRECT_RENDERING',
+            ]
+        else:
+            cppdefines += [
+                'GLX_DIRECT_RENDERING',
+                'GLX_INDIRECT_RENDERING',
+            ]
+        if env['platform'] in ('linux', 'freebsd'):
+            cppdefines += ['HAVE_ALIAS']
+        else:
+            cppdefines += ['GLX_ALIAS_UNSUPPORTED']
+    if platform == 'windows':
+        cppdefines += [
+            'WIN32',
+            '_WINDOWS',
+            #'_UNICODE',
+            #'UNICODE',
+            # http://msdn.microsoft.com/en-us/library/aa383745.aspx
+            ('_WIN32_WINNT', '0x0601'),
+            ('WINVER', '0x0601'),
+        ]
+        if gcc:
+            cppdefines += [('__MSVCRT_VERSION__', '0x0700')]
+        if msvc and env['toolchain'] != 'winddk':
+            cppdefines += [
+                'VC_EXTRALEAN',
+                '_USE_MATH_DEFINES',
+                '_CRT_SECURE_NO_WARNINGS',
+                '_CRT_SECURE_NO_DEPRECATE',
+                '_SCL_SECURE_NO_WARNINGS',
+                '_SCL_SECURE_NO_DEPRECATE',
+            ]
+        if env['build'] in ('debug', 'checked'):
+            cppdefines += ['_DEBUG']
+    if env['toolchain'] == 'winddk':
+        # Mimic WINDDK's builtin flags. See also:
+        # - WINDDK's bin/makefile.new i386mk.inc for more info.
+        # - buildchk_wxp_x86.log files, generated by the WINDDK's build
+        # - http://alter.org.ua/docs/nt_kernel/vc8_proj/
+        if machine == 'x86':
+            cppdefines += ['_X86_', 'i386']
+        if machine == 'x86_64':
+            cppdefines += ['_AMD64_', 'AMD64']
+    if platform == 'winddk':
+        cppdefines += [
+            'STD_CALL',
+            ('CONDITION_HANDLING', '1'),
+            ('NT_INST', '0'),
+            ('WIN32', '100'),
+            ('_NT1X_', '100'),
+            ('WINNT', '1'),
+            ('_WIN32_WINNT', '0x0501'), # minimum required OS version
+            ('WINVER', '0x0501'),
+            ('_WIN32_IE', '0x0603'),
+            ('WIN32_LEAN_AND_MEAN', '1'),
+            ('DEVL', '1'),
+            ('__BUILDMACHINE__', 'WinDDK'),
+            ('FPO', '0'),
+        ]
+        if env['build'] in ('debug', 'checked'):
+            cppdefines += [('DBG', 1)]
+    if platform == 'wince':
+        cppdefines += [
+            '_CRT_SECURE_NO_DEPRECATE',
+            '_USE_32BIT_TIME_T',
+            'UNICODE',
+            '_UNICODE',
+            ('UNDER_CE', '600'),
+            ('_WIN32_WCE', '0x600'),
+            'WINCEOEM',
+            'WINCEINTERNAL',
+            'WIN32',
+            'STRICT',
+            'x86',
+            '_X86_',
+            'INTERNATIONAL',
+            ('INTLMSG_CODEPAGE', '1252'),
+        ]
+    if platform == 'windows':
+        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER']
+    if platform == 'winddk':
+        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_DISPLAY']
+    if platform == 'wince':
+        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE']
+        cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_CE_OGL']
+    if env['embedded']:
+        cppdefines += ['PIPE_SUBSYSTEM_EMBEDDED']
+    env.Append(CPPDEFINES = cppdefines)
+
+    # C compiler options
+    cflags = [] # C
+    cxxflags = [] # C++
+    ccflags = [] # C & C++
+    if gcc:
+        ccversion = env['CCVERSION']
+        if env['build'] == 'debug':
+            ccflags += ['-O0']
+        elif ccversion.startswith('4.2.'):
+            # gcc 4.2.x optimizer is broken
+            print "warning: gcc 4.2.x optimizer is broken -- disabling optimizations"
+            ccflags += ['-O0']
+        else:
+            ccflags += ['-O3']
+        # Work around aliasing bugs - developers should comment this out
+        ccflags += ['-fno-strict-aliasing']
+        ccflags += ['-g']
+        if env['build'] in ('checked', 'profile'):
+            # See http://code.google.com/p/jrfonseca/wiki/Gprof2Dot#Which_options_should_I_pass_to_gcc_when_compiling_for_profiling?
+            ccflags += [
+                '-fno-omit-frame-pointer',
+                '-fno-optimize-sibling-calls',
+            ]
+        if env['machine'] == 'x86':
+            ccflags += [
+                '-m32',
+                #'-march=pentium4',
+            ]
+            if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2') \
+               and (platform != 'windows' or env['build'] == 'debug' or True):
+                # NOTE: We need to ensure stack is realigned given that we
+                # produce shared objects, and have no control over the stack
+                # alignment policy of the application. Therefore we need
+                # -mstackrealign ore -mincoming-stack-boundary=2.
+                #
+                # XXX: -O and -mstackrealign causes stack corruption on MinGW
+                #
+                # XXX: We could have SSE without -mstackrealign if we always used
+                # __attribute__((force_align_arg_pointer)), but that's not
+                # always the case.
+                ccflags += [
+                    '-mstackrealign', # ensure stack is aligned
+                    '-mmmx', '-msse', '-msse2', # enable SIMD intrinsics
+                    #'-mfpmath=sse',
+                ]
+            if platform in ['windows', 'darwin']:
+                # Workaround http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37216
+                ccflags += ['-fno-common']
+        if env['machine'] == 'x86_64':
+            ccflags += ['-m64']
+            if platform == 'darwin':
+                ccflags += ['-fno-common']
+        if env['platform'] != 'windows':
+            ccflags += ['-fvisibility=hidden']
+        # See also:
+        # - http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
+        ccflags += [
+            '-Wall',
+            '-Wno-long-long',
+            '-ffast-math',
+            '-fmessage-length=0', # be nice to Eclipse
+        ]
+        cflags += [
+            '-Wmissing-prototypes',
+            '-std=gnu99',
+        ]
+        if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.0'):
+            ccflags += [
+                '-Wmissing-field-initializers',
+            ]
+        if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('4.2'):
+            ccflags += [
+                '-Wpointer-arith',
+            ]
+            cflags += [
+                '-Wdeclaration-after-statement',
+            ]
+    if msvc:
+        # See also:
+        # - http://msdn.microsoft.com/en-us/library/19z1t1wy.aspx
+        # - cl /?
+        if env['build'] == 'debug':
+            ccflags += [
+              '/Od', # disable optimizations
+              '/Oi', # enable intrinsic functions
+              '/Oy-', # disable frame pointer omission
+            ]
+        else:
+            ccflags += [
+                '/O2', # optimize for speed
+            ]
+        if env['build'] == 'release':
+            ccflags += [
+                '/GL', # enable whole program optimization
+            ]
+        else:
+            ccflags += [
+                '/GL-', # disable whole program optimization
+            ]
+        ccflags += [
+            '/fp:fast', # fast floating point 
+            '/W3', # warning level
+            #'/Wp64', # enable 64 bit porting warnings
+        ]
+        if env['machine'] == 'x86':
+            ccflags += [
+                #'/arch:SSE2', # use the SSE2 instructions
+            ]
+        if platform == 'windows':
+            ccflags += [
+                # TODO
+            ]
+        if platform == 'winddk':
+            ccflags += [
+                '/Zl', # omit default library name in .OBJ
+                '/Zp8', # 8bytes struct member alignment
+                '/Gy', # separate functions for linker
+                '/Gm-', # disable minimal rebuild
+                '/WX', # treat warnings as errors
+                '/Gz', # __stdcall Calling convention
+                '/GX-', # disable C++ EH
+                '/GR-', # disable C++ RTTI
+                '/GF', # enable read-only string pooling
+                '/G6', # optimize for PPro, P-II, P-III
+                '/Ze', # enable extensions
+                '/Gi-', # disable incremental compilation
+                '/QIfdiv-', # disable Pentium FDIV fix
+                '/hotpatch', # prepares an image for hotpatching.
+                #'/Z7', #enable old-style debug info
+            ]
+        if platform == 'wince':
+            # See also C:\WINCE600\public\common\oak\misc\makefile.def
+            ccflags += [
+                '/Zl', # omit default library name in .OBJ
+                '/GF', # enable read-only string pooling
+                '/GR-', # disable C++ RTTI
+                '/GS', # enable security checks
+                # Allow disabling language conformance to maintain backward compat
+                #'/Zc:wchar_t-', # don't force wchar_t as native type, instead of typedef
+                #'/Zc:forScope-', # don't enforce Standard C++ for scoping rules
+                #'/wd4867',
+                #'/wd4430',
+                #'/MT',
+                #'/U_MT',
+            ]
+        # Automatic pdb generation
+        # See http://scons.tigris.org/issues/show_bug.cgi?id=1656
+        env.EnsureSConsVersion(0, 98, 0)
+        env['PDB'] = '${TARGET.base}.pdb'
+    env.Append(CCFLAGS = ccflags)
+    env.Append(CFLAGS = cflags)
+    env.Append(CXXFLAGS = cxxflags)
+
+    if env['platform'] == 'windows' and msvc:
+        # Choose the appropriate MSVC CRT
+        # http://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
+        if env['build'] in ('debug', 'checked'):
+            env.Append(CCFLAGS = ['/MTd'])
+            env.Append(SHCCFLAGS = ['/LDd'])
+        else:
+            env.Append(CCFLAGS = ['/MT'])
+            env.Append(SHCCFLAGS = ['/LD'])
+    
+    # Assembler options
+    if gcc:
+        if env['machine'] == 'x86':
+            env.Append(ASFLAGS = ['-m32'])
+        if env['machine'] == 'x86_64':
+            env.Append(ASFLAGS = ['-m64'])
+
+    # Linker options
+    linkflags = []
+    shlinkflags = []
+    if gcc:
+        if env['machine'] == 'x86':
+            linkflags += ['-m32']
+        if env['machine'] == 'x86_64':
+            linkflags += ['-m64']
+        if env['platform'] not in ('darwin'):
+            shlinkflags += [
+                '-Wl,-Bsymbolic',
+            ]
+        # Handle circular dependencies in the libraries
+        if env['platform'] in ('darwin'):
+            pass
+        else:
+            env['_LIBFLAGS'] = '-Wl,--start-group ' + env['_LIBFLAGS'] + ' -Wl,--end-group'
+        if env['platform'] == 'windows':
+            # Avoid depending on gcc runtime DLLs
+            linkflags += ['-static-libgcc']
+            if env['machine'] == 'x86_64':
+                linkflags += ['-static-libstdc++']
+            # Handle the @xx symbol munging of DLL exports
+            shlinkflags += ['-Wl,--enable-stdcall-fixup']
+            #shlinkflags += ['-Wl,--kill-at']
+    if msvc:
+        if env['build'] == 'release':
+            # enable Link-time Code Generation
+            linkflags += ['/LTCG']
+            env.Append(ARFLAGS = ['/LTCG'])
+    if platform == 'windows' and msvc:
+        # See also:
+        # - http://msdn2.microsoft.com/en-us/library/y0zzbyt4.aspx
+        linkflags += [
+            '/fixed:no',
+            '/incremental:no',
+        ]
+    if platform == 'winddk':
+        linkflags += [
+            '/merge:_PAGE=PAGE',
+            '/merge:_TEXT=.text',
+            '/section:INIT,d',
+            '/opt:ref',
+            '/opt:icf',
+            '/ignore:4198,4010,4037,4039,4065,4070,4078,4087,4089,4221',
+            '/incremental:no',
+            '/fullbuild',
+            '/release',
+            '/nodefaultlib',
+            '/wx',
+            '/debug',
+            '/debugtype:cv',
+            '/version:5.1',
+            '/osversion:5.1',
+            '/functionpadmin:5',
+            '/safeseh',
+            '/pdbcompress',
+            '/stack:0x40000,0x1000',
+            '/driver',
+            '/align:0x80',
+            '/subsystem:native,5.01',
+            '/base:0x10000',
+
+            '/entry:DrvEnableDriver',
+        ]
+        if env['build'] != 'release':
+            linkflags += [
+                '/MAP', # http://msdn.microsoft.com/en-us/library/k7xkk3e2.aspx
+            ]
+    if platform == 'wince':
+        linkflags += [
+            '/nodefaultlib',
+            #'/incremental:no',
+            #'/fullbuild',
+            '/entry:_DllMainCRTStartup',
+        ]
+    env.Append(LINKFLAGS = linkflags)
+    env.Append(SHLINKFLAGS = shlinkflags)
+
+    # We have C++ in several libraries, so always link with the C++ compiler
+    if env['gcc']:
+        env['LINK'] = env['CXX']
+
+    # Default libs
+    libs = []
+    if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
+        libs += ['m', 'pthread', 'dl']
+    env.Append(LIBS = libs)
+
+    # OpenMP
+    if env['openmp']:
+        if env['msvc']:
+            env.Append(CCFLAGS = ['/openmp'])
+            # When building openmp release VS2008 link.exe crashes with LNK1103 error.
+            # Workaround: overwrite PDB flags with empty value as it isn't required anyways
+            if env['build'] == 'release':
+                env['PDB'] = ''
+        if env['gcc']:
+            env.Append(CCFLAGS = ['-fopenmp'])
+            env.Append(LIBS = ['gomp'])
+
+    # Load tools
+    env.Tool('lex')
+    env.Tool('yacc')
+    if env['llvm']:
+        env.Tool('llvm')
+    
+    # Custom builders and methods
+    env.Tool('custom')
+    createInstallMethods(env)
+
+    env.PkgCheckModules('X11', ['x11', 'xext', 'xdamage', 'xfixes'])
+    env.PkgCheckModules('XF86VIDMODE', ['xxf86vm'])
+    env.PkgCheckModules('DRM', ['libdrm'])
+    env.PkgCheckModules('DRM_INTEL', ['libdrm_intel'])
+    env.PkgCheckModules('DRM_RADEON', ['libdrm_radeon'])
+    env.PkgCheckModules('XORG', ['xorg-server'])
+    env.PkgCheckModules('KMS', ['libkms'])
+    env.PkgCheckModules('UDEV', ['libudev'])
+
+    env['dri'] = env['x11'] and env['drm']
+
+    # for debugging
+    #print env.Dump()
+
+
+def exists(env):
+    return 1