Thanks for your answer.

Ok, here is what I have exactly done:

- compiled with my uClibc cross-compiler a simple hello world program.
- written a basic config file in linux-2.6.37/usr, creating a dev/console,
a /init from /usr/hello and some other dirs.
- edited the .config file with CONFIG_INITRAMFS_SOURCE =
......./usr/config_file and selected CONFIG_INITRAMFS_COMPRESSION_GZIP=y
- built the kernel
- launched vmlinux and received the "kernel panic: junk in compressed
archive" error message

In the source code, initrd_start ans initrd_end appears.
if i want to use initramfs support (and not initrd support), should I do
something special in "setup_arch()" in order to initialize these symbols?

thakns in advance
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