SConstruct revision 41750107496858a047afa8d81d20fe903f285a78 
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
23import os
24import os.path
25import sys
26import SCons.Util
27
28import common
29
30#######################################################################
31# Configuration options
32
33opts = Variables('config.py')
34common.AddOptions(opts)
35
36env = Environment(
37	options = opts,
38	tools = ['gallium'],
39	toolpath = ['#scons'],	
40	ENV = os.environ,
41)
42
43# Backwards compatability with old target configuration variable
44try:
45    targets = ARGUMENTS['targets']
46except KeyError:
47    pass
48else:
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
57Help(opts.GenerateHelpText(env))
58
59# fail early for a common error on windows
60if 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
70env.Prepend(CPPPATH = [
71	'#/include',
72])
73env.Append(CPPPATH = [
74	'#/src/gallium/include',
75	'#/src/gallium/auxiliary',
76	'#/src/gallium/drivers',
77	'#/src/gallium/winsys',
78])
79
80if env['msvc']:
81    env.Append(CPPPATH = ['#include/c99'])
82
83# Posix
84if 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
116if 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
151Export('env')
152
153#######################################################################
154# Invoke SConscripts
155
156# TODO: Build several variants at the same time?
157# http://www.scons.org/wiki/SimultaneousVariantBuilds
158
159SConscript(
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
165