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Specific advice for Linux systems
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   If you are installing GNU libc on a Linux system, you need to have
the header files from a 2.2 or newer kernel around for reference.  For
some architectures, like ia64, sh and hppa, you need at least headers
from kernel 2.3.99 (sh and hppa) or 2.4.0 (ia64).  You do not need to
use that kernel, just have its headers where glibc can access at them.
The easiest way to do this is to unpack it in a directory such as
`/usr/src/linux-2.2.1'.  In that directory, run `make config' and
accept all the defaults.  Then run `make include/linux/version.h'.
Finally, configure glibc with the option
`--with-headers=/usr/src/linux-2.2.1/include'.  Use the most recent
kernel you can get your hands on.

   An alternate tactic is to unpack the 2.2 kernel and run `make
config' as above.  Then rename or delete `/usr/include', create a new
`/usr/include', and make the usual symbolic links of
`/usr/include/linux' and `/usr/include/asm' into the 2.2 kernel
sources.  You can then configure glibc with no special options.  This
tactic is recommended if you are upgrading from libc5, since you need
to get rid of the old header files anyway.

   Note that `/usr/include/net' and `/usr/include/scsi' should *not* be
symlinks into the kernel sources.  GNU libc provides its own versions
of these files.

   Linux expects some components of the libc installation to be in
`/lib' and some in `/usr/lib'.  This is handled automatically if you
configure glibc with `--prefix=/usr'.  If you set some other prefix or
allow it to default to `/usr/local', then all the components are
installed there.

   If you are upgrading from libc5, you need to recompile every shared
library on your system against the new library for the sake of new code,
but keep the old libraries around for old binaries to use.  This is
complicated and difficult.  Consult the Glibc2 HOWTO at
<http://www.imaxx.net/~thrytis/glibc> for details.

   You cannot use `nscd' with 2.0 kernels, due to bugs in the
kernel-side thread support.  `nscd' happens to hit these bugs
particularly hard, but you might have problems with any threaded
program.