Initial commit. We have a booting kernel

config.sh

@@ -0,0 +1,28 @@
+SYSTEM_HEADER_PROJECTS="libc kernel"
+PROJECTS="libc kernel"
+ 
+export MAKE=${MAKE:-make}
+export HOST=${HOST:-$(./default-host.sh)}
+ 
+export AR=${HOST}-ar
+export AS=${HOST}-as
+export CC=${HOST}-gcc
+ 
+export PREFIX=/usr
+export EXEC_PREFIX=$PREFIX
+export BOOTDIR=/boot
+export LIBDIR=$EXEC_PREFIX/lib
+export INCLUDEDIR=$PREFIX/include
+ 
+export CFLAGS='-O2 -g'
+export CPPFLAGS=''
+ 
+# Configure the cross-compiler to use the desired system root.
+export SYSROOT="$(pwd)/sysroot"
+export CC="$CC --sysroot=$SYSROOT"
+ 
+# Work around that the -elf gcc targets doesn't have a system include directory
+# because it was configured with --without-headers rather than --with-sysroot.
+if echo "$HOST" | grep -Eq -- '-elf($|-)'; then
+  export CC="$CC -isystem=$INCLUDEDIR"
+fi