On 18 Feb 2015 04:56, H.J. Lu wrote:
> On Wed, Feb 18, 2015 at 4:08 AM, Joel Brobecker <brobecker@adacore.com> wrote:
> > On Wed, Jan 07, 2015 at 06:45:48PM +0400, Joel Brobecker wrote:
> >> This patch enhances config/zlib.m4 to introduce an extra option
> >> --with-libz-prefix which allows us to provide the location of
> >> the zlib library we want to use during the build.
> >>
> >> config/ChangeLog:
> >>
> >>         * zlib.m4 (AM_ZLIB): Add --with-libz-prefix option support.
> >>
> >> I didn't see any file in the GCC project that uses this macro,
> >> so for the GCC repository, the change to zlib.m4 is it. But
> >> I am also attaching to this email a copy of the patch that
> >> will be applied to the binutils-gdb.git repository, with all
> >> configury using this macro being re-generated - mostly for info,
> >> also as a heads-up to both binutils and GDB.
> >>
> >> This was tested by regenerating all autoconf/automake files in
> >> the binutils-gdb project, and rebuilding GDB, using the following
> >> combinations:
> >>
> >>   --with-zlib (system zlib used)
> >>   --with-libz-prefix=/zlib/prefix (specific zlib linked in)
> >>   --with-zlib --with-libz-prefix=/zlib/prefix (specific zlib linked in)
> >>
> >>   --without-zlib (zlib support turned off)
> >>   --without-zlib --with-zlib-prefix (zlib support turned off)
> >>
> >>   --with-zlib (no system zlib available, configure fails with expected error)
> >>   --with-zlib --with-libz-prefix=/invalid/zlib/prefix
> >>               (no system zlib, configure fails with same error)
> >>
> >> OK to commit?
> 
> Why do you want to turn off zlib? On Linux/x86,  zlib is required
> for assembler.  At least, you should issue an error when --without-libz
> is used in binutils for Linux/x86 target.

err, when did that happen ?  why would zlib be possibly required for an 
assembler ?
-mike