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

[Tristan Gingold <gingold@adacore.com>]

> On 21 Jan 2015, at 08:47, Joel Brobecker <brobecker@adacore.com> wrote:
> 
> Thank you! :)

What is the rational for having --with-zlib but --with-libz-prefix
(ie zlib vs libz) ?  Looks not very consistent.

Tristan.

> 
> On Wed, Jan 07, 2015 at 06:45:48PM +0400, Joel Brobecker wrote:
>> Hello,
>> 
>> 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)