cross compilation

[barbalace]

Dear list,
 I have a program that when cross compiled need a program that must be built on
the build platform (assuming cross compiling when build != host and host ==
target).
 Like I've read on the autotool book, on the autoconf manual and on the autoconf
forum I've tried to use the CC_FOR_BUILD substituition variable and the
config.guess and config.sub invoking
AC_CANONICAL_BUILD/AC_CANONICAL_HOST/AC_CANONICAL_TARGET. After this macros,
running ./configure using --build=i686-pc-linux-gnu
--host=powerpc-7450-linux-gnu, CC_FOR_BUILD is empty. But this is not my only
problem because I need to use AR, RANLIB and LD from the Makefiles and I can't
find AR_FOR_BUILD and co.
 Have you got any suggestions?

Thanks a lot,

Antonio Barbalace
Control Group Researcher
Energetic Engeneer PhD Student,
University of Padova
RFX, IGI CNR Experiment
Corso Stati Uniti 4,
35100, Padova, Italy
www.igi.cnr.it