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 # XXX: This creates a many problems as it saves...
  44 #opts.Save('config.py', env)
  45
  46 # Backwards compatability with old target configuration variable
  47 try:
  48     targets = ARGUMENTS['targets']
  49 except KeyError:
  50     pass
  51 else:
  52     targets = targets.split(',')
  53     print 'scons: warning: targets option is deprecated; pass the targets on their own such as'
  54     print
  55     print '  scons %s' % ' '.join(targets)
  56     print
  57     COMMAND_LINE_TARGETS.append(targets)
  58
  59
  60 Help(opts.GenerateHelpText(env))
  61
  62 # fail early for a common error on windows
  63 if env['gles']:
  64     try:
  65         import libxml2
  66     except ImportError:
  67         raise SCons.Errors.UserError, "GLES requires libxml2-python to build"
  68
  69 #######################################################################
  70 # Environment setup
  71
  72 # Includes
  73 env.Prepend(CPPPATH = [
  74         '#/include',
  75 ])
  76 env.Append(CPPPATH = [
  77         '#/src/gallium/include',
  78         '#/src/gallium/auxiliary',
  79         '#/src/gallium/drivers',
  80         '#/src/gallium/winsys',
  81 ])
  82
  83 if env['msvc']:
  84     env.Append(CPPPATH = ['#include/c99'])
  85
  86 # for debugging
  87 #print env.Dump()
  88
  89
  90 #######################################################################
  91 # Invoke host SConscripts
  92 #
  93 # For things that are meant to be run on the native host build machine, instead
  94 # of the target machine.
  95 #
  96
  97 # Create host environent
  98 if env['crosscompile'] and not env['embedded']:
  99     host_env = Environment(
 100         options = opts,
 101         # no tool used
 102         tools = [],
 103         toolpath = ['#scons'],
 104         ENV = os.environ,
 105     )
 106
 107     # Override options
 108     host_env['platform'] = common.host_platform
 109     host_env['machine'] = common.host_machine
 110     host_env['toolchain'] = 'default'
 111     host_env['llvm'] = False
 112
 113     host_env.Tool('gallium')
 114
 115     host_env['hostonly'] = True
 116     assert host_env['crosscompile'] == False
 117
 118     if host_env['msvc']:
 119         host_env.Append(CPPPATH = ['#include/c99'])
 120
 121     target_env = env
 122     env = host_env
 123     Export('env')
 124
 125     SConscript(
 126         'src/SConscript',
 127         variant_dir = host_env['build_dir'],
 128         duplicate = 0, # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
 129     )
 130
 131     env = target_env
 132
 133 Export('env')
 134
 135 #######################################################################
 136 # Invoke SConscripts
 137
 138 # TODO: Build several variants at the same time?
 139 # http://www.scons.org/wiki/SimultaneousVariantBuilds
 140
 141 SConscript(
 142         'src/SConscript',
 143         variant_dir = env['build_dir'],
 144         duplicate = 0 # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
 145 )
 146
 147
 148 ########################################################################
 149 # List all aliases
 150
 151 try:
 152     from SCons.Node.Alias import default_ans
 153 except ImportError:
 154     pass
 155 else:
 156     aliases = default_ans.keys()
 157     aliases.sort()
 158     env.Help('\n')
 159     env.Help('Recognized targets:\n')
 160     for alias in aliases:
 161         env.Help('    %s\n' % alias)