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+======  Cross Compile for PPC  ======
+First install eldk described [[IceCube#Installing_ELDK|here]].
+=====  Automake and Autoconf  =====
+We use automake and autoconf, because cmake cannot cross compile yet.
+At first we need some files for automake:
+<code>
+touch NEWS
+touch README
+touch AUTHORS
+touch ChangeLog
+</code>
+Create a autogen.sh:
+<code>
+#!/bin/sh
+rm -f config.cache
+rm -f acconfig.h
+autoreconf --force --install -I config -I m4
+#autoconf
+#autoheader
+#automake --add-missing
+./configure "$@"
+echo
+echo "Now type 'make' to compile."
+</code>
+We have the following directory structure:
+<code>
+/
+ -> i2c
+</code>
+Now create a file called configure.ac:
+<code>
+AC_INIT(icecube, 0.1)
+AC_PREREQ(2.5)
+AC_CONFIG_SRCDIR([i2c/readMax6633.c])
+AC_CONFIG_AUX_DIR(config)
+AM_INIT_AUTOMAKE(1.8)
+AC_PROG_CC
+dnl Checks for header files.
+AC_CONFIG_HEADER(config.h)
+AC_HEADER_STDC
+AC_CONFIG_FILES([Makefile i2c/Makefile])
+AC_OUTPUT
+</code>
+And a file Makefile.am:
+<code>
+EXTRA_DIST = autogen.sh configure
+SUBDIRS = i2c
+</code>
+In the directory i2c create a file Makefile.am:
+<code>
+INCLUDES = -I/usr/local/eldk/ppc_6xx/usr/include
+bin_PROGRAMS = readMax6633
+readMax6633_SOURCES = readMax6633.c
+</code>
+Now execute the script autogen.sh with:
+<code>
+./autogen.sh --host=ppc-6xx --prefix=/usr/local/eldk/ppc_6xx/usr/local
+</code>
+To cross-compile now do the following:
+<code>
+export CROSS_COMPILE=ppc_6xx-
+make
+</code>
+=====  cmake  =====
+Create a file CMakeLists.txt:
+<code>
+project (ICECUBE)
+SET(CMAKE_C_FLAGS "-O")
+add_subdirectory(i2c)
+</code>
+And a file i2c/CMakeLists.txt:
+<code>
+add_executable (readMax6633 readMax6633.c)
+</code>
+Now execute:
+<code>
+CC=ppc_6xx-gcc cmake .
+</code>

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