windows: sporadic configure errors in cygwin

[Magnus Ihse Bursie]

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.

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