windows: sporadic configure errors in cygwin

[Thomas Stüfe]

Hi Magnus,

On Mon, Sep 4, 2017 at 12:09 PM, Magnus Ihse Bursie <
magnus.ihse.bursie at oracle.com> wrote:

>
> On 2017-08-11 13:00, Thomas Stüfe wrote:
>
>> Hi all,
>>
>> when building OpenJDK 10/hs on Windows, I get sporadic configure errors.
>> Usually one of two things, either:
>>
>> configure: The tested number of bits in the target (0) differs from the
>> number of bits expected to be found in the target (32).
>>
>> or the endianness test failing.
>>
>> Most of the time, just retrying the configure run works.
>>
>> I have the feeling this happens mostly when running several builds in
>> parallel. I am currently using 32bit cygwin.
>>
> You cannot/should not run multiple "configure" in parallel in the same
> directory. This is due to a limitation of the autoconf framework that we
> are using -- they test features (like word size) by creating a file in the
> current directory (conf.c I believe it's called), compiling and running it.
> So if you run multiple configure calls in parallel, these tests can
> interfere with each other.
>
>
Thanks for looking into this.

Not sure I understand you: I call configure script from different build
output directories ("output-slowdebug", "output-release" etc), one
directory per build. But all builds reference the same source tree. Would
that be the problem you describe?

..Thomas

Once the configure step is done, you can build multiple configurations
> using "make" at the same time.
>
>
/Magnus
>
>
>
>> Does anyone see similar errors or maybe have a solution?
>>
>> Best Regards, Thomas
>>
>
>