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

[Peter Rehley <peter at rehley dot net>]

On Nov 20, 2004, at 10:19 AM, Reini Urban wrote:

> Peter Rehley schrieb:
> > On Nov 20, 2004, at 12:07 AM, Reini Urban wrote:
> > > Peter Rehley schrieb:
> > > > Peter Rehley wrote:
> > > > > Larry Hall wrote:
> > > > > > > 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?
> > >
> > >
> > > there's no build script and an inactive maintainer. we don't know. 
> > > hopefully just the standard options.
> > > ./configure --prefix=/usr sharedstatedir=/var --mandir=/usr/share/man
> > > make && make install
> > Using these options the behavior of flex differs from the flex that 
> > is shipped with cygwin.
> > > > > > Linking against /usr/lib/binmode.o perhaps?
> > >
> > >
> > > He meant that by accident flex was linked against binmode.o, which 
> > > is wrong. It was no advice to reproduce that error with linking 
> > > against binmode or textmount.
> > >
> > > > > Tried on cygwin 1.5.12
> > > > > make clean
> > > > > make LDFLAGS="/usr/lib/binmode.o",
> > > > >
> > > > > and
> > > > > make clean
> > > > > make LDFLAGS="-lbinmode"
> > > > >
> > > > > but neither helped
> > >
> > >
> > > for sure not.
> > >
> > > > However linking the /usr/lib/textmode.o did work
> > > > make LDFLAGS="/usr/lib/textmode.o" # <- did the job
> > > > Thanks Larry for pointing me in the right directory :)
> > >
> > > Oh god. This was the right direction? Sorry no.
> > >
> > > If you open your flex input file in a *textmode mount* \r\n will get 
> > > converted, if you open that in a binmode mount it will not get 
> > > converted.
> > > $ man mount
> > The filesystem has been mounted in binmode, but  the flex that comes 
> > with cygwin translates the files.  Both flex and the text file are on 
> > binmode mounts.
>
> ok thanks, for confirmation.
> so cgf should repackage it. it's obviously a bug.
I think so also because this isn't the behavior that occurs on linux or 
BSD.

> And please add a hint how to reproduce from source, so we don't have 
> to guess. Christofer claims that he didn't link against textmode.a, 
> but it looks like so, or there was some deeper magic behind, which 
> went away suddenly.
He is using automode.o, he said in one of the followups to this thread.

Hint should be included in original posting.  It has original make 
commands that I used plus a simple example for testing.  It also has 
instructions on how to build and run the simple sample

Modified build commands would be ./configure; make 
LDFLAGS="/usr/lib/automode.o"


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