Re: [PATCH] Fix gdbserver build with x86_64-w64-mingw32 -m32

[Zach Welch <zwelch@codesourcery.com>]

On 01/09/2015 08:17 PM, Joel Brobecker wrote:
>> This patch allows a x86_64-w64-mingw32 toolchain to build a 32-bit
>> gdbserver.  Without it, gdbserver attempts to link to the 64-bit
>> register files, resulting in undefined references.
>>
>> 	* configure.ac: Add check for -m32 on x86_64-*-mingw*.
>> 	* configure.srv: If using -m32 on x86_64-*-mingw*, use i386
>> 	instead of amd64 registers.
>> 	* configure: Regenerated.
>> 	* aclocal.m4: Regenerated.
> 
> Intuitively, I would say that the proper way to achive a 32bit
> gdbserver is by configuring it using a 32bit triplet, no?
> What happens if you do:
> 
>     ./configure --build=i686-pc-mingw32 CFLAGS='-m32'

Actually, I am using i686-pc-linux-gnu as $build.  I think you meant to
ask for --host.  I am using --host=x86_64-w64-mingw32 CFLAGS=-m32, which
is distinctly different than i686-pc-mingw32.  For example, they use
completely different runtime libraries.  I think it would be an error to
conflate the two toolchains.  Thus, I stand by my patch as the correct
solution for this issue.

-- 
Zach Welch
Mentor Graphics Corporation
zwelch@codesourcery.com
(503) 685-5434