diff --git a/SConstruct b/SConstruct
new file mode 100644
index 0000000..25accdd
--- /dev/null
+++ b/SConstruct
@@ -0,0 +1,40 @@
+# -*- mode: python; coding: utf-8 -*-
+
+#  Codezero -- a microkernel for embedded systems.
+#
+#  Copyright © 2009 Russel Winder
+#
+#  This program is free software: you can redistribute it and/or modify it under the terms of the GNU
+#  General Public License as published by the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+#  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+#  License for more details.
+#
+#  You should have received a copy of the GNU General Public License along with this program.  If not, see
+#  <http://www.gnu.org/licenses/>.
+#
+#  Author: Russel Winder
+
+import os
+
+arch = 'arm'
+platform = 'pb926'
+
+environment = Environment (
+    CC = 'arm-none-linux-gnueabi-gcc',
+    CCFLAGS = [ '-g' , '-nostdinc' , '-nostdlib' , '-ffreestanding' ] ,
+    LINKFLAGS = [ '-nostdlib' ] ,
+    ENV = { 'PATH' : os.environ['PATH'] } ,
+    LIBS = 'gcc' ,
+    ARCH = arch , 
+    PLATFORM = platform )
+
+Export ( 'environment' )
+
+libs = { }
+crts = { }
+for variant in [ 'baremetal' , 'userspace' ] :
+    ( libs[variant] , crts[variant] ) = SConscript ( 'libs/c/SConscript' , variant_dir = 'build/lib/c/' + variant , duplicate = 0 , exports = { 'variant' : variant } )
+
diff --git a/libs/c/SConscript b/libs/c/SConscript
new file mode 100644
index 0000000..846a798
--- /dev/null
+++ b/libs/c/SConscript
@@ -0,0 +1,35 @@
+# -*- mode: python; coding: utf-8 -*-
+
+#  Codezero -- a microkernel for embedded systems.
+#
+#  Copyright © 2009 Russel Winder
+#
+#  This program is free software: you can redistribute it and/or modify it under the terms of the GNU
+#  General Public License as published by the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+#  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+#  License for more details.
+#
+#  You should have received a copy of the GNU General Public License along with this program.  If not, see
+#  <http://www.gnu.org/licenses/>.
+#
+#  Author: Russel Winder
+
+Import ( 'environment' , 'variant' )
+
+source = \
+        Glob ( 'src/*.c' ) + \
+        Glob ( 'src/sys-' + variant + '/*.c' ) + \
+        Glob ( 'src/sys-' + variant + '/arch-' + environment['ARCH'] + '/*.c' ) + \
+        Glob ( 'src/sys-' + variant + '/arch-' + environment['ARCH'] + '/plat-' + environment['PLATFORM'] + '/*.c' ) + \
+        Glob ( 'src/arch-' + environment['ARCH'] + '/*.c' ) + \
+        Glob ( 'src/arch-' + environment['ARCH'] + '/*.S' )
+
+result = (
+    environment.StaticLibrary ( 'c-' + variant , source , CPPPATH = [ 'include' , 'include/sys-' + variant + '/arch-' + environment['ARCH'] ] ) ,
+    environment.StaticObject ( 'crt/sys-' + variant + '/arch-' + environment['ARCH'] + '/crt0.S' )
+    )
+
+Return ( 'result' )