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How to use the GNU auto configure tools on JuGene?

When using the GUN auto configure tools (automake, autoconf, ...) for the BlueGene/P backend compilers, the following sequence of commands seem to work best:

export CXX=/bgsys/drivers/ppcfloor/gnu-linux/bin/powerpc-bgp-linux-g++
export CC=/bgsys/drivers/ppcfloor/gnu-linux/bin/powerpc-bgp-linux-gcc
export CFLAGS="-g -O2 -dynamic"
export CXXFLAGS="-g -O2 -dynamic"

Then

libtoolize --force
aclocal
autoheader
automake
autoconf

./configure --host=powerpc-bgp-linux ...