[ipxe-devel] Problems with Compiling: Commit 2b15ae55073dfbaf66dbbb41ebe804a16cf47f1e

[Michael Brown]

On 26 July 2015 18:21:18 BST, Matthew Helton <mwhelton at gmail.com> wrote:
>James,
>
>Agreed. Yes, and we need the requirements for GCC and other packages
>updated as well. It's fine that a newer platform is needed, but it
>needs to
>be documented.
>
>Michael, Robin?
>
>Matt
>
>
>On Sun, Jul 26, 2015 at 12:12 PM, James A. Peltier <jpeltier at sfu.ca>
>wrote:
>
>> The question is, is this intentional code breakage or a mistake?  Is
>> CentOS 6 no longer supported as a build platform for iPXE? 
>Thankfully I
>> also run an HPC cluster where I already had newer versions of GCC
>compiled
>> for other things to test with or I wouldn't have found it so quickly.
>>
>> ------------------------------
>>
>> James,
>>
>> Thank you; it's fixed by migrating to a CentOS 7 build and gcc 4.8.3;
>as
>> mentioned before in this list you need xz-devel installed or the make
>will
>> croak at "util/zbin lzma.h: No such file or directory"
>>
>> Best,
>>
>> Matt
>>
>>
>> On Sat, Jul 25, 2015 at 7:38 PM, James A. Peltier <jpeltier at sfu.ca>
>wrote:
>>
>>> Ya, I have the same problem on a CentOS 6 box using the stock GCC,
>>> however, newer versions of GCC, for example 4.9.2 do not exhibit the
>>> problem.
>>>
>>> ------------------------------
>>>
>>> When making:
>>>
>>> $ make
>>>   [DEPS] core/xferbuf.c
>>>   [BUILD] bin/xferbuf.o
>>> cc1: warnings being treated as errors
>>> core/xferbuf.c: In function ‘xfer_buffer’:
>>> core/xferbuf.c:312: error: value computed is not used
>>> make: *** [bin/xferbuf.o] Error 1
>>> $
>>>
>>> System GCC: gcc.x86_64                          4.4.7-11.el6
>>>
>>> Looks like a simple issue, but I'm not sure of the syntax;
>>>
>>> Best,
>>>
>>> Matt
>>>
>>>
>>>
>>> _______________________________________________
>>> ipxe-devel mailing list
>>> ipxe-devel at lists.ipxe.org
>>> https://lists.ipxe.org/mailman/listinfo.cgi/ipxe-devel
>>>
>>>
>>>
>>>
>>> --
>>> James A. Peltier
>>> IT Services - Research Computing Group
>>> Simon Fraser University - Burnaby Campus
>>> Phone   : 604-365-6432
>>> Fax     : 778-782-3045
>>> E-Mail  : jpeltier at sfu.ca
>>> Website : http://www.sfu.ca/itservices
>>> Twitter : @sfu_rcg
>>> Powering Engagement Through Technology
>>>
>>
>>
>>
>> --
>> There is never time enough to do it right, but there always seems to
>be
>> enough time to do it again.
>>
>>
>>
>>
>> --
>> James A. Peltier
>> IT Services - Research Computing Group
>> Simon Fraser University - Burnaby Campus
>> Phone   : 604-365-6432
>> Fax     : 778-782-3045
>> E-Mail  : jpeltier at sfu.ca
>> Website : http://www.sfu.ca/itservices
>> Twitter : @sfu_rcg
>> Powering Engagement Through Technology
>>

It's not a change in build requirements, just a debatable warning that happens not to show up in current gcc versions. It should be fixable by just adding "(void)" to the start of the offending line.

Will push a fix tomorrow.

Michael