[Buildroot] [PATCH 2/2] ntp: prevent keyword-gen failure during ntp_keyword.h check

[Danomi Manchego]

On Fri, Jul 18, 2014 at 3:26 PM, Thomas Petazzoni
<thomas.petazzoni at free-electrons.com> wrote:
> Dear Danomi Manchego,
>
> On Thu, 17 Jul 2014 23:56:54 -0400, Danomi Manchego wrote:
>> During the first compile, the keyword-gen check is not run.  However,
>> it gets run on the first rebuild.  Because we are cross-compiling, the
>> keyword-gen can't run on the host.  Since this is only used to check if
>> ntp_keyword.h is up to date, we simply drop the check altogether.
>>
>> Signed-off-by: Danomi Manchego <danomimanchego123 at gmail.com>
>
> I haven't applied this one, because I'm not entirely satisfied by the
> explanation here. Why isn't the keyword-gen check executed on the first
> run? I did some testing, and I indeed don't see the rule about
> ntp_keyword.h being evaluated on the first build. Do you have more
> details about what makes the difference between the first and
> subsequent builds?

No.  Stranger yet, when the patch is applied, I found that the
keyword-gen check is only run on the *first* ntp-rebuild.  Further
ntp-rebuilds do not cause the check to re-occur.

But anyway, I didn't notice any indication that the keyword-gen would
be compiled with a HOSTCC, so I reasoned that if it's cross-compiled,
then it shouldn't be run on the build machine in any circumstance.  So
I didn't investigate further.

Danomi -