Re: Perl 5, version 14, subversion 2 (v5.14.2) 
    Cygwin: CYGWIN_NT-5.1  1.7.25(0.270/5/3

In Perl (I am attempting to open a file and put an exclusive lock on it to 
update
it like this:

###########################################

use Fcntl qw( O_RDWR  O_CREAT  O_NONBLOCK  O_EXLOCK );


     sysopen($FH, $fname, O_RDWR | O_CREAT | O_NONBLOCK |  O_EXLOCK, 0664)


############################################

Result on a test run give me the following error message:

"Your vendor has not defined Fcntl macro O_EXLOCK,"

Is it possible to develope perl code on cygwin that can use file locking to 
update data in a file from within perl?

Thank you.

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