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+#######################################################################
+# Top-level SConstruct
+#
+# For example, invoke scons as
+#
+# scons debug=1 dri=0 machine=x86
+#
+# to set configuration variables. Or you can write those options to a file
+# named config.py:
+#
+# # config.py
+# debug=1
+# dri=0
+# machine='x86'
+#
+# Invoke
+#
+# scons -h
+#
+# to get the full list of options. See scons manpage for more info.
+#
+
+import os
+import os.path
+import sys
+
+import common
+
+#######################################################################
+# Configuration options
+
+default_statetrackers = 'mesa'
+
+if common.default_platform in ('linux', 'freebsd', 'darwin'):
+ default_drivers = 'softpipe,failover,i915simple,trace,identity,llvmpipe'
+ default_winsys = 'xlib'
+elif common.default_platform in ('winddk',):
+ default_drivers = 'softpipe,i915simple,trace,identity'
+ default_winsys = 'all'
+else:
+ default_drivers = 'all'
+ default_winsys = 'all'
+
+opts = Variables('config.py')
+common.AddOptions(opts)
+opts.Add(ListVariable('statetrackers', 'state trackers to build', default_statetrackers,
+ ['mesa', 'python', 'xorg']))
+opts.Add(ListVariable('drivers', 'pipe drivers to build', default_drivers,
+ ['softpipe', 'failover', 'i915simple', 'i965simple', 'cell', 'trace', 'r300', 'identity', 'llvmpipe']))
+opts.Add(ListVariable('winsys', 'winsys drivers to build', default_winsys,
+ ['xlib', 'intel', 'gdi', 'radeon']))
+
+opts.Add(EnumVariable('MSVS_VERSION', 'MS Visual C++ version', None, allowed_values=('7.1', '8.0', '9.0')))
+
+env = Environment(
+ options = opts,
+ tools = ['gallium'],
+ toolpath = ['#scons'],
+ ENV = os.environ,
+)
+
+Help(opts.GenerateHelpText(env))
+
+# replicate options values in local variables
+debug = env['debug']
+dri = env['dri']
+llvm = env['llvm']
+machine = env['machine']
+platform = env['platform']
+
+# derived options
+x86 = machine == 'x86'
+ppc = machine == 'ppc'
+gcc = platform in ('linux', 'freebsd', 'darwin')
+msvc = platform in ('windows', 'winddk')
+
+Export([
+ 'debug',
+ 'x86',
+ 'ppc',
+ 'dri',
+ 'llvm',
+ 'platform',
+ 'gcc',
+ 'msvc',
+])
+
+
+#######################################################################
+# Environment setup
+
+# Includes
+env.Append(CPPPATH = [
+ '#/include',
+ '#/src/gallium/include',
+ '#/src/gallium/auxiliary',
+ '#/src/gallium/drivers',
+])
+
+
+# Posix
+if platform in ('posix', 'linux', 'freebsd', 'darwin'):
+ env.Append(CPPDEFINES = [
+ '_POSIX_SOURCE',
+ ('_POSIX_C_SOURCE', '199309L'),
+ '_SVID_SOURCE',
+ '_BSD_SOURCE',
+ '_GNU_SOURCE',
+
+ 'PTHREADS',
+ 'HAVE_POSIX_MEMALIGN',
+ ])
+ env.Append(CPPPATH = ['/usr/X11R6/include'])
+ env.Append(LIBPATH = ['/usr/X11R6/lib'])
+ env.Append(LIBS = [
+ 'm',
+ 'pthread',
+ 'expat',
+ 'dl',
+ ])
+
+
+# DRI
+if dri:
+ env.ParseConfig('pkg-config --cflags --libs libdrm')
+ env.Append(CPPDEFINES = [
+ ('USE_EXTERNAL_DXTN_LIB', '1'),
+ 'IN_DRI_DRIVER',
+ 'GLX_DIRECT_RENDERING',
+ 'GLX_INDIRECT_RENDERING',
+ ])
+
+# LLVM
+if llvm:
+ # See also http://www.scons.org/wiki/UsingPkgConfig
+ env.ParseConfig('llvm-config --cflags --ldflags --libs backend bitreader engine instrumentation interpreter ipo')
+ env.Append(CPPDEFINES = ['MESA_LLVM'])
+ # Force C++ linkage
+ env['LINK'] = env['CXX']
+
+# libGL
+if platform in ('linux', 'freebsd', 'darwin'):
+ env.Append(LIBS = [
+ 'X11',
+ 'Xext',
+ 'Xxf86vm',
+ 'Xdamage',
+ 'Xfixes',
+ ])
+
+# for debugging
+#print env.Dump()
+
+Export('env')
+
+
+#######################################################################
+# Invoke SConscripts
+
+# TODO: Build several variants at the same time?
+# http://www.scons.org/wiki/SimultaneousVariantBuilds
+
+SConscript(
+ 'src/SConscript',
+ variant_dir = env['build'],
+ duplicate = 0 # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
+)