SConstruct

   1 #######################################################################
   2 # Top-level SConstruct
   3 #
   4 # For example, invoke scons as
   5 #
   6 #   scons build=debug llvm=yes machine=x86
   7 #
   8 # to set configuration variables. Or you can write those options to a file
   9 # named config.py:
  10 #
  11 #   # config.py
  12 #   build='debug'
  13 #   llvm=True
  14 #   machine='x86'
  15 #
  16 # Invoke
  17 #
  18 #   scons -h
  19 #
  20 # to get the full list of options. See scons manpage for more info.
  21 #
  22
  23 import os
  24 import os.path
  25 import sys
  26 import SCons.Util
  27
  28 import common
  29
  30 #######################################################################
  31 # Configuration options
  32
  33 opts = Variables('config.py')
  34 common.AddOptions(opts)
  35
  36 env = Environment(
  37         options = opts,
  38         tools = ['gallium'],
  39         toolpath = ['#scons'],
  40         ENV = os.environ,
  41 )
  42
  43 opts.Save('config.py', env)
  44
  45 # Backwards compatability with old target configuration variable
  46 try:
  47     targets = ARGUMENTS['targets']
  48 except KeyError:
  49     pass
  50 else:
  51     targets = targets.split(',')
  52     print 'scons: warning: targets option is deprecated; pass the targets on their own such as'
  53     print
  54     print '  scons %s' % ' '.join(targets)
  55     print
  56     COMMAND_LINE_TARGETS.append(targets)
  57
  58
  59 Help(opts.GenerateHelpText(env))
  60
  61 # fail early for a common error on windows
  62 if env['gles']:
  63     try:
  64         import libxml2
  65     except ImportError:
  66         raise SCons.Errors.UserError, "GLES requires libxml2-python to build"
  67
  68 #######################################################################
  69 # Environment setup
  70
  71 # Includes
  72 env.Prepend(CPPPATH = [
  73         '#/include',
  74 ])
  75 env.Append(CPPPATH = [
  76         '#/src/gallium/include',
  77         '#/src/gallium/auxiliary',
  78         '#/src/gallium/drivers',
  79         '#/src/gallium/winsys',
  80 ])
  81
  82 if env['msvc']:
  83     env.Append(CPPPATH = ['#include/c99'])
  84
  85 # for debugging
  86 #print env.Dump()
  87
  88
  89 #######################################################################
  90 # Invoke host SConscripts
  91 #
  92 # For things that are meant to be run on the native host build machine, instead
  93 # of the target machine.
  94 #
  95
  96 # Create host environent
  97 if env['crosscompile'] and not env['embedded']:
  98     host_env = Environment(
  99         options = opts,
 100         # no tool used
 101         tools = [],
 102         toolpath = ['#scons'],
 103         ENV = os.environ,
 104     )
 105
 106     # Override options
 107     host_env['platform'] = common.host_platform
 108     host_env['machine'] = common.host_machine
 109     host_env['toolchain'] = 'default'
 110     host_env['llvm'] = False
 111
 112     host_env.Tool('gallium')
 113
 114     host_env['hostonly'] = True
 115     assert host_env['crosscompile'] == False
 116
 117     if host_env['msvc']:
 118         host_env.Append(CPPPATH = ['#include/c99'])
 119
 120     target_env = env
 121     env = host_env
 122     Export('env')
 123
 124     SConscript(
 125         'src/SConscript',
 126         variant_dir = host_env['build_dir'],
 127         duplicate = 0, # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
 128     )
 129
 130     env = target_env
 131
 132 Export('env')
 133
 134 #######################################################################
 135 # Invoke SConscripts
 136
 137 # TODO: Build several variants at the same time?
 138 # http://www.scons.org/wiki/SimultaneousVariantBuilds
 139
 140 SConscript(
 141         'src/SConscript',
 142         variant_dir = env['build_dir'],
 143         duplicate = 0 # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
 144 )
 145
 146
 147 ########################################################################
 148 # List all aliases
 149
 150 try:
 151     from SCons.Node.Alias import default_ans
 152 except ImportError:
 153     pass
 154 else:
 155     aliases = default_ans.keys()
 156     aliases.sort()
 157     env.Help('\n')
 158     env.Help('Recognized targets:\n')
 159     for alias in aliases:
 160         env.Help('    %s\n' % alias)