Am 19.03.2020 um 11:14 schrieb Eliot Moss:
On 3/16/2020 7:34 PM, Mark Geisert wrote:
> Mark Geisert wrote:
>> Eliot Moss wrote:
>>>
>>> Dear cygwin-ers --
>>>
>>> Something I had asked about a while ago was the absence os taskset
in cygwin's
>>> util-linux. At the time, it was pointed out that the necessary
get/set
>>> affinity library/system calls were not yet supported. These were
added a
>>> while ago, so it would seem that taskset ought to work. In fact, I
think
>>> someone got it going on their own. Can we add it to util-linux now,
>>> officially? I think this was intended but perhaps was overlooked or
>>> something.
>>
>> Report noted; thanks. A solution is being worked.
>
> There's been no forward progress on this. If you're comfortable
getting the util-linux source
> package through Cygwin setup*.exe, you can follow the steps shown in
> https://cygwin.com/pipermail/cygwin-apps/2020-March/039855.html to
build (with cygport) a local copy
> of util-linux that includes a taskset.exe you can move into
/usr/local/bin, for example.
>
> You might try that route if you're up for it. Feel free to ask
questions here if you hit a snag.
> HTH,
Thank you, Mark. I decided to give it a try and got some distance, but
hit a snag.
First, I had to change configure.ac to add control to disable ionice
(Cygwin
does not support a required syscall) while still trying to build taskset.
Previously taskset and ionice (and one other program) were controlled by
the
single --enable-schedutils.
Now, including sched.h does not provide the prototypes for
sched_getaffinity,
etc. I found a previous post that suggests we need to do -D_GNU_SOURCE
for it
to work. I am not sure of the best place to stick that, but I will see
about
maybe a one line patch to taskset.c or something.
Regards - Eliot
one brutal solution I recently used
cygconf
echo "defining _GNU_SOURCE on config.h"
echo "#define _GNU_SOURCE 1" >> config.h
cygmake
the patch approach is usually restricted to a portion
of the code or a general header.
May be there is already something like that in the code,
or you can add a similar stuff
#if defined(__linux__) || defined(__CYGWIN__)
# ifndef _GNU_SOURCE
# define _GNU_SOURCE
# endif
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