scons: Move common code to a separate file.
diff --git a/common.py b/common.py
new file mode 100644
index 0000000..e2650d6
--- /dev/null
+++ b/common.py
@@ -0,0 +1,113 @@
+#######################################################################
+# Common SCons code
+
+import os
+import os.path
+import sys
+import platform as _platform
+
+
+#######################################################################
+# Defaults
+
+_platform_map = {
+ 'linux2': 'linux',
+ 'win32': 'winddk',
+}
+
+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',
+ 'x86_64': 'x86_64',
+}
+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')
+
+if default_platform in ('linux', 'freebsd', 'darwin'):
+ default_dri = 'yes'
+elif default_platform in ('winddk',):
+ default_dri = 'no'
+else:
+ default_dri = 'no'
+
+
+#######################################################################
+# Common options
+
+def Options():
+ from SCons.Options import Options
+ from SCons.Options.BoolOption import BoolOption
+ from SCons.Options.EnumOption import EnumOption
+ opts = Options('config.py')
+ opts.Add(BoolOption('debug', 'build debug version', 'no'))
+ opts.Add(EnumOption('machine', 'use machine-specific assembly code', default_machine,
+ allowed_values=('generic', 'x86', 'x86_64')))
+ opts.Add(EnumOption('platform', 'target platform', default_platform,
+ allowed_values=('linux', 'cell', 'winddk')))
+ opts.Add(BoolOption('llvm', 'use LLVM', 'no'))
+ opts.Add(BoolOption('dri', 'build DRI drivers', default_dri))
+ return opts
+
+
+#######################################################################
+# Convenience Library Builder
+# based on the stock StaticLibrary and SharedLibrary builders
+
+import SCons.Action
+import SCons.Builder
+
+def createConvenienceLibBuilder(env):
+ """This is a utility function that creates the ConvenienceLibrary
+ Builder in an Environment if it is not there already.
+
+ If it is already there, we return the existing one.
+ """
+
+ try:
+ convenience_lib = env['BUILDERS']['ConvenienceLibrary']
+ except KeyError:
+ action_list = [ SCons.Action.Action("$ARCOM", "$ARCOMSTR") ]
+ if env.Detect('ranlib'):
+ ranlib_action = SCons.Action.Action("$RANLIBCOM", "$RANLIBCOMSTR")
+ action_list.append(ranlib_action)
+
+ convenience_lib = SCons.Builder.Builder(action = action_list,
+ emitter = '$LIBEMITTER',
+ prefix = '$LIBPREFIX',
+ suffix = '$LIBSUFFIX',
+ src_suffix = '$SHOBJSUFFIX',
+ src_builder = 'SharedObject')
+ env['BUILDERS']['ConvenienceLibrary'] = convenience_lib
+ env['BUILDERS']['Library'] = convenience_lib
+
+ return convenience_lib
+
+
+#######################################################################
+# Build
+
+def make_build_dir(env):
+ # Put build output in a separate dir, which depends on the current configuration
+ # See also http://www.scons.org/wiki/AdvancedBuildExample
+ build_topdir = 'build'
+ build_subdir = env['platform']
+ if env['dri']:
+ build_subdir += "-dri"
+ if env['llvm']:
+ build_subdir += "-llvm"
+ if env['machine'] != 'generic':
+ build_subdir += '-' + env['machine']
+ if env['debug']:
+ build_subdir += "-debug"
+ build_dir = os.path.join(build_topdir, build_subdir)
+ return build_dir
+