gallium: Add SCons as alternative build system for Gallium.
diff --git a/SConstruct b/SConstruct
new file mode 100644
index 0000000..db6161e
--- /dev/null
+++ b/SConstruct
@@ -0,0 +1,214 @@
+#######################################################################
+# Top-level SConstruct
+
+import os
+import sys
+
+
+#######################################################################
+# Configuration options
+#
+# For example, invoke scons as
+#
+# scons debug=1 dri=0 x86=1
+#
+# to set configuration variables. Or you can write those options to a file
+# named config.py:
+#
+# # config.py
+# debug=1
+# dri=0
+# x86=1
+#
+# Invoke
+#
+# scons -h
+#
+# to get the full list of options. See scons manpage for more info.
+#
+
+# TODO: auto-detect defaults
+opts = Options('config.py')
+opts.Add(BoolOption('debug', 'build debug version', False))
+opts.Add(BoolOption('dri', 'build dri drivers', False))
+opts.Add(EnumOption('machine', 'use machine-specific assembly code', 'x86',
+ allowed_values=('generic', 'x86', 'x86-64')))
+
+env = Environment(options = opts)
+Help(opts.GenerateHelpText(env))
+
+# for debugging
+#print env.Dump()
+
+if 1:
+ # platform will be typically 'posix' or 'win32'
+ platform = env['PLATFORM']
+else:
+ # platform will be one of 'linux', 'freebsd', 'win32', 'darwin', etc.
+ platform = sys.platform
+ if platform == 'linux2':
+ platform = 'linux'
+
+# replicate options values in local variables
+debug = env['debug']
+dri = env['dri']
+machine = env['machine']
+
+# derived options
+x86 = machine == 'x86'
+gcc = platform == 'posix'
+msvc = platform == 'win32'
+
+Export([
+ 'debug',
+ 'x86',
+ 'dri',
+ 'platform',
+ 'gcc',
+ 'msvc',
+])
+
+
+#######################################################################
+# Environment setup
+#
+# TODO: put the compiler specific settings in seperate files
+# TODO: auto-detect as much as possible
+
+
+# Optimization flags
+if gcc:
+ if debug:
+ env.Append(CFLAGS = '-O0 -g3')
+ env.Append(CXXFLAGS = '-O0 -g3')
+ else:
+ env.Append(CFLAGS = '-O3 -g3')
+ env.Append(CXXFLAGS = '-O3 -g3')
+
+ env.Append(CFLAGS = '-Wall -Wmissing-prototypes -std=c99 -ffast-math -pedantic')
+ env.Append(CXXFLAGS = '-Wall -pedantic')
+
+ # Be nice to Eclipse
+ env.Append(CFLAGS = '-fmessage-length=0')
+ env.Append(CXXFLAGS = '-fmessage-length=0')
+
+# Defines
+env.Append(CPPDEFINES = [
+ '_POSIX_SOURCE',
+ ('_POSIX_C_SOURCE', '199309L'),
+ '_SVID_SOURCE',
+ '_BSD_SOURCE',
+ '_GNU_SOURCE',
+
+ 'PTHREADS',
+ 'HAVE_ALIAS',
+ 'HAVE_POSIX_MEMALIGN',
+])
+
+if debug:
+ env.Append(CPPDEFINES = ['DEBUG'])
+else:
+ env.Append(CPPDEFINES = ['NDEBUG'])
+
+
+# Includes
+env.Append(CPPPATH = [
+ '#/include',
+ '#/src/mesa',
+ '#/src/mesa/main',
+ '#/src/mesa/pipe',
+
+ '/usr/X11R6/include',
+])
+
+
+# x86 assembly
+if x86:
+ env.Append(CPPDEFINES = [
+ 'USE_X86_ASM',
+ 'USE_MMX_ASM',
+ 'USE_3DNOW_ASM',
+ 'USE_SSE_ASM',
+ ])
+ if gcc:
+ env.Append(CFLAGS = '-m32')
+ env.Append(CXXFLAGS = '-m32')
+
+env.Append(LIBPATH = ['/usr/X11R6/lib'])
+
+env.Append(LIBS = [
+ 'm',
+ 'pthread',
+ 'expat',
+ 'dl',
+])
+
+# DRI
+if dri:
+ env.ParseConfig('pkg-config --cflags --libs libdrm')
+ env.Append(CPPDEFINES = [
+ ('USE_EXTERNAL_DXTN_LIB', '1'),
+ 'IN_DRI_DRIVER',
+ 'GLX_DIRECT_RENDERING',
+ 'GLX_INDIRECT_RENDERING',
+ ])
+
+# libGL
+if 1:
+ env.Append(LIBS = [
+ 'X11',
+ 'Xext',
+ 'Xxf86vm',
+ 'Xdamage',
+ 'Xfixes',
+ ])
+
+Export('env')
+
+
+#######################################################################
+# Convenience Library Builder
+# based on the stock StaticLibrary and SharedLibrary builders
+
+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 = [ Action("$ARCOM", "$ARCOMSTR") ]
+ if env.Detect('ranlib'):
+ ranlib_action = Action("$RANLIBCOM", "$RANLIBCOMSTR")
+ action_list.append(ranlib_action)
+
+ convenience_lib = 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
+
+createConvenienceLibBuilder(env)
+
+
+#######################################################################
+# Invoke SConscripts
+
+# Put build output in a separate dir
+# TODO: make build_dir depend on platform and build type (check
+# http://www.scons.org/wiki/AdvancedBuildExample for an example)
+build_dir = 'build'
+
+SConscript(
+ 'src/mesa/SConscript',
+ build_dir = build_dir,
+ duplicate = 0 # http://www.scons.org/doc/0.97/HTML/scons-user/x2261.html
+)