Hello,

As mentioned on the binutils list, we'd like to add support for
--disable-zlib, in order to be able to build a GDB that does not
have a dependency on that library:

    http://www.sourceware.org/ml/binutils/2009-10/msg00600.html

This is the sim and gdb part, which needs to be checked in at the same
time as the binutils part.

sim/

        * common/aclocal.m4: Add include of ../../config/zlib.m4.
        * common/common.m4: Use AM_ZLIB to check for zlib support.
        * ppc/configure.ac: Likewise.
        * arm/configure, avr/configure, common/configure, cr16/configure,
        cris/configure, d10v/configure, erc32/configure, frv/configure,
        h8300/configure, iq2000/configure, lm32/configure, m32c/configure,
        m32r/configure, m68hc11/configure, mcore/configure,
        microblaze/configure, mips/configure, mn10300/configure,
        moxie/configure, ppc/configure, sh/configure, sh64/configure,
        v850/configure: Regenerate.

gdb/

        * acinclude.m4: Include ../config/zlib.m4.
        * configure.ac: Use AM_ZLIB to check for zlib support.
        * configure: Regenerate.

I tested these changes by building GDB with and without --disable-zlib,
and verified that the dependency on libz disappeared in the second case.
I'd like to commit in a few days unless there are some objections.

Thanks,
-- 
Joel