Everyone using CVS head, and owning flex-2.5.31 (or higher)--

Please note that a new version of the expression ( $[  ]  constructs used in 
extensions.conf ) parser
is automatically built by the makefile if your flex is at 2.5.31 or higher. You 
can see what your
flex version is by saying flex -V...

Now, the new scanner has some nice things about it, but it does behave a little 
differently
in some (hopefully rare) situations. To help find one of these situations 
quickly, I submitted
a program for consideration to be included somewhere in the asterisk CVS, which 
checks for the
one problem I've seen reported so far. I advise everyone using cvs head and 
having flex-2.5.31, to
run this program the first time you build asterisk. You won't need it 
afterwards. Look at the 
expressions it flags, and if you don't understand the issue, read the 
README.variables file.

First, you can obtain the check_expr.c file by browsing to: 
http://bugs.digium.com/view.php?id=4491
and clicking on the attached file link.

Compile it with gcc -o check_expr -g check_expr.c

run it with ./check_expr /etc/asterisk/extensions.conf      (or whatever the 
path is on your machine).

an expr2_log file will be created, and every $[ ] expression it finds will be 
listed with its status.

If you get any warnings, look over the situation, and see if you have to do 
anything. The most likely
thing you might want to do is wrap some things in double quotes to keep the 
indicated operator from
being evaluated, such as regex expressions for the ":" operator.

Any questions, just write me. I'll do the best I can.

murf
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