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Date:	Tue, 15 Oct 2013 15:47:22 -0400
From:	Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: [ANNOUNCEMENT] Updated: make-4.0-1 (x86 and x86_64)
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On Mon, Oct 14, 2013 at 09:12:48AM -0400, Rolf Campbell wrote:
>On 2013-10-11 13:12, Christopher Faylor wrote:
>> I've made a new version of make available for installation.  This is a
>> refresh against the newly released make-4.0.  The appropriate contents
>> of the NEWS file for this snapshot are below.
>[...]
>> * New command line option: --output-sync (-O) enables grouping of output by
>>    target or by recursive make.  This is useful during parallel builds to avoid
>>    mixing output from different jobs together giving hard-to-understand
>>    results.  Original implementation by David Boyce <dsb AT boyski DOT com>.
>>    Reworked and enhanced by Frank Heckenbach <f DOT heckenbach AT fh-soft DOT de>.
>>    Windows support by Eli Zaretskii <eliz AT gnu DOT org>.
>
>Whenever I try this under cygwin, I get an error output "fcntl(): 
>Invalid argument", even with extremely trivial makefiles and 
>invocations.  Make seems to work correctly, but produces error output.
>
>echo -e 'all:\n\ttouch $@' > m.mk
>make -O -f m.mk
>
>Produces this output:
>fcntl(): Invalid argument
>touch all
>
>I've tried this using both the 32-bit version and 64-bit version of 
>cygwin 1.7.25 with the same results.

I can't test this right now but it will probably work better if you
redirect stdout/stderr to a file.  That's what the make testsuite does.
make apparently expects to be able to get a lock on console/tty which
isn't currently supported on Cygwin.

cgf

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