Installing gcc on AIX 5.3

we have a development AIX 5.3 on PowerPC CPU having the standard CC compiler. I downloaded the gcc 4.2.4, unpacked it and tried to install

it seems there is something missing; untar takes around 15 minutes and ends with an error trying to create a directory starting with @ sign.

and in the gcc folder itself, I can't find a configure or a Makefile to install

any hint on how to do so?

Further update, I got version 4.3.5 and got the same error on the same location when running tar xvf gcc-4.3.5.tar

x gcc-4.3.5/libstdc++-v3/testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation

tar: 0511-188 Cannot create ././@LongLink: The file access permissions do not allow the specified action.

x gcc-4.3.5/libstdc++-v3/testsuite/25_algorithms/stable_partition/requirements/explicit_instantiation

tar: 0511-169 A directory checksum error on media; -241274376 not equal to 42619.

please note that this error happened on two different tar files, both were originally compressed as bz2