diff --git a/base/README b/base/README
index 501bf6a0e6bc..3a13d6953653 100644
--- a/base/README
+++ b/base/README
@@ -1,18 +1,30 @@
 # $FreeBSD$
 
 How to cross build initial toolchain
 
 Example with sparc64
 
 1/ install a cross toolchain
 pkg install sparc64-xtoolchain-gcc
 
 2/ cross build world
 make CROSS_TOOLCHAIN=sparc64-gcc TARGET=sparc64 TARGET_ARCH=sparc64 buildworld
 
 3/ install the world in a sysroot
 make CROSS_TOOLCHAIN=sparc64-gcc TARGET=sparc64 TARGET_ARCH=sparc64 installworld DESTDIR=/sysroots/sparc64
 
 4/ build the required port
 $ cd base/binutils
 make CROSS_TOOLCHAIN=sparc64-gcc CROSS_SYSROOT=/sysroots/sparc64 package
+
+$ cd base/gcc
+make CROSS_TOOLCHAIN=sparc64-gcc CROSS_SYSROOT=/sysroots/sparc64 package
+
+the package are in base/gcc/work/pkg/*.txz and base/binutils/work/pkg/*.txz
+
+To add a plist for a new binutils target
+$ cd base/binutils
+make CROSS_TOOLCHAIN=sparc64-gcc CROSS_SYSROOT=/sysroots/sparc64 makeplist > pkg-plist
+
+edit the pkg-plist and remove everything which base does not provide via the
+elftoolchain