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 # Backwards compatability with old target configuration variable
  44 try:
  45     targets = ARGUMENTS['targets']
  46 except KeyError:
  47     pass
  48 else:
  49     targets = targets.split(',')
  50     print 'scons: warning: targets option is deprecated; pass the targets on their own such as'
  51     print
  52     print '  scons %s' % ' '.join(targets)
  53     print
  54     COMMAND_LINE_TARGETS.append(targets)
  55
  56
  57 Help(opts.GenerateHelpText(env))
  58
  59 # fail early for a common error on windows
  60 if env['gles']:
  61     try:
  62         import libxml2
  63     except ImportError:
  64         raise SCons.Errors.UserError, "GLES requires libxml2-python to build"
  65
  66 #######################################################################
  67 # Environment setup
  68
  69 # Includes
  70 env.Prepend(CPPPATH = [
  71         '#/include',
  72 ])
  73 env.Append(CPPPATH = [
  74         '#/src/gallium/include',
  75         '#/src/gallium/auxiliary',
  76         '#/src/gallium/drivers',
  77         '#/src/gallium/winsys',
  78 ])
  79
  80 if env['msvc']:
  81     env.Append(CPPPATH = ['#include/c99'])
  82
  83 # Posix
  84 if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
  85         env.Append(CPPDEFINES = [
  86                 '_POSIX_SOURCE',
  87                 ('_POSIX_C_SOURCE', '199309L'),
  88                 '_SVID_SOURCE',
  89                 '_BSD_SOURCE',
  90                 '_GNU_SOURCE',
  91                 'PTHREADS',
  92                 'HAVE_POSIX_MEMALIGN',
  93         ])
  94         if env['gcc']:
  95                 env.Append(CFLAGS = ['-fvisibility=hidden'])
  96         if env['platform'] == 'darwin':
  97                 env.Append(CPPDEFINES = ['_DARWIN_C_SOURCE'])
  98         env.Append(LIBS = [
  99                 'm',
 100                 'pthread',
 101                 'dl',
 102         ])
 103
 104 # for debugging
 105 #print env.Dump()
 106
 107
 108 #######################################################################
 109 # Invoke host SConscripts
 110 #
 111 # For things that are meant to be run on the native host build machine, instead
 112 # of the target machine.
 113 #
 114
 115 # Create host environent
 116 if env['crosscompile'] and not env['embedded']:
 117     host_env = Environment(
 118         options = opts,
 119         # no tool used
 120         tools = [],
 121         toolpath = ['#scons'],
 122         ENV = os.environ,
 123     )
 124
 125     # Override options
 126     host_env['platform'] = common.host_platform
 127     host_env['machine'] = common.host_machine
 128     host_env['toolchain'] = 'default'
 129     host_env['llvm'] = False
 130
 131     host_env.Tool('gallium')
 132
 133     host_env['hostonly'] = True
 134     assert host_env['crosscompile'] == False
 135
 136     if host_env['msvc']:
 137         host_env.Append(CPPPATH = ['#include/c99'])
 138
 139     target_env = env
 140     env = host_env
 141     Export('env')
 142
 143     SConscript(
 144         'src/SConscript',
 145         variant_dir = host_env['build_dir'],
 146         duplicate = 0, # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
 147     )
 148
 149     env = target_env
 150
 151 Export('env')
 152
 153 #######################################################################
 154 # Invoke SConscripts
 155
 156 # TODO: Build several variants at the same time?
 157 # http://www.scons.org/wiki/SimultaneousVariantBuilds
 158
 159 SConscript(
 160         'src/SConscript',
 161         variant_dir = env['build_dir'],
 162         duplicate = 0 # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
 163 )
 164