ping #3: [RFA] Add --with-libz-prefix option in config/zlib.m4

[Mike Frysinger]

On 18 Feb 2015 08:58, H.J. Lu wrote:
> On Wed, Feb 18, 2015 at 8:54 AM, Mike Frysinger wrote:
> > On 18 Feb 2015 04:56, H.J. Lu wrote:
> >> On Wed, Feb 18, 2015 at 4:08 AM, Joel Brobecker 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 ?
> 
> commit 89e7505fcde4bd83948f559f429a0e1eb4262f05
> Author: H.J. Lu <hjl.tools@gmail.com>
> Date:   Sun Dec 14 06:41:03 2014 -0800
> 
>     Compress debug sections for Linux/x86 by default
> 
>       * config/tc-i386.c (flag_compress_debug): Default to compress
>       debug sections for Linux.

i don't see how that justifies making it a hard requirement
-mike
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