flex and dos source files. How is flex built for cygwin

[Peter Rehley <prehley at mvista dot com>]

Hi,

We have a customer that is using flex under a custom version of cygwin 
that we provided them (with source).  The customer is having problems 
when their "*.l" files are in dos format.  Flex is taking the lines from 
the file and adding them into the lex.yy.c file untouched.  (i.e. they 
still have the \n\r at the end), and this causing problems later on.

I tried using the version of flex that comes with the latest version of 
cygwin (1.5.12) and flex changes the \n\r to just \n, which makes 
everything work fine.  Good I thought since the version of flex we 
provide is not the latest.  I'll just recompile.

But when I tried that with the latest flex (2.5.4a-3) I get the same 
behavior that the customer is seeing.  I get this behavior even if I 
compile on the latest version of cygwin.

So, my question is what options are used for building flex?

I've done "./configure; make"  is there something special that I need to 
add to either command.  I'm including a simple test program that I found 
on the web that can demonstrate this problem.  Untar it and in the 
directory type "make ; ./simple < testfile".  With cygwin you should see:
Desk Calculator, version 1.0 (<date>)
80

14
400
Successful Completion

For the flex compiled from the source, type "make 
LEX='<newflexdir/flex'; ./simple < testfile".  You should see
Desk Calculator, version 1.0 (<date>)
bison: syntax error

Any help would be appreciated,
Peter

Attachment: simple.tar.bz2
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