1 files changed, 93 insertions, 0 deletions
diff --git a/common.py b/common.py
new file mode 100644
index 0000000000..f7dbe55aa8
--- /dev/null
+++ b/common.py
@@ -0,0 +1,93 @@
+#######################################################################
+# Common SCons code
+
+import os
+import os.path
+import re
+import subprocess
+import sys
+import platform as _platform
+
+
+#######################################################################
+# Defaults
+
+_platform_map = {
+	'linux2': 'linux',
+	'win32': 'windows',
+}
+
+default_platform = sys.platform
+default_platform = _platform_map.get(default_platform, default_platform)
+
+_machine_map = {
+	'x86': 'x86',
+	'i386': 'x86',
+	'i486': 'x86',
+	'i586': 'x86',
+	'i686': 'x86',
+	'ppc' : 'ppc',
+	'x86_64': 'x86_64',
+}
+
+
+# find default_machine value
+if 'PROCESSOR_ARCHITECTURE' in os.environ:
+	default_machine = os.environ['PROCESSOR_ARCHITECTURE']
+else:
+	default_machine = _platform.machine()
+default_machine = _machine_map.get(default_machine, 'generic')
+
+
+# find default_llvm value
+if 'LLVM' in os.environ:
+    default_llvm = 'yes'
+else:
+    # Search sys.argv[] for a "platform=foo" argument since we don't have
+    # an 'env' variable at this point.
+    platform = default_platform
+    pattern = re.compile("(platform=)(.*)")
+    for arg in sys.argv:
+        m = pattern.match(arg)
+        if m:
+            platform = m.group(2)
+
+    default_llvm = 'no'
+    try:
+        if platform != 'windows' and subprocess.call(['llvm-config', '--version'], stdout=subprocess.PIPE) == 0:
+            default_llvm = 'yes'
+    except:
+        pass
+
+
+# find default_dri value
+if default_platform in ('linux', 'freebsd'):
+	default_dri = 'yes'
+elif default_platform in ('winddk', 'windows', 'wince', 'darwin'):
+	default_dri = 'no'
+else:
+	default_dri = 'no'
+
+
+#######################################################################
+# Common options
+
+def AddOptions(opts):
+	try:
+		from SCons.Variables.BoolVariable import BoolVariable as BoolOption
+	except ImportError:
+		from SCons.Options.BoolOption import BoolOption
+	try:
+		from SCons.Variables.EnumVariable import EnumVariable as EnumOption
+	except ImportError:
+		from SCons.Options.EnumOption import EnumOption
+	opts.Add(BoolOption('debug', 'debug build', 'yes'))
+	opts.Add(BoolOption('profile', 'profile build', 'no'))
+	opts.Add(BoolOption('quiet', 'quiet command lines', 'yes'))
+	opts.Add(EnumOption('machine', 'use machine-specific assembly code', default_machine,
+											 allowed_values=('generic', 'ppc', 'x86', 'x86_64')))
+	opts.Add(EnumOption('platform', 'target platform', default_platform,
+											 allowed_values=('linux', 'cell', 'windows', 'winddk', 'wince', 'darwin', 'embedded', 'cygwin')))
+	opts.Add('toolchain', 'compiler toolchain', 'default')
+	opts.Add(BoolOption('llvm', 'use LLVM', default_llvm))
+	opts.Add(BoolOption('dri', 'build DRI drivers', default_dri))