RE: [Caml-list] Flexdll circular dependency fix uses system provided flexdll.h [was: opam-cross-windows]

[David Allsopp <dra-news@metastack.com>]

Michael Soegtrop wrote:
> Dear David,
> 
> > What's your precise sequence of commands (right from untarring or git
> clone)?
> > Is this from a git clone or a released tarball?
> 
> I use this tarbal:
> 
> https://github.com/ocaml/ocaml/archive/4.03.0.tar.gz
> 
> I try to create a mingw cross ocaml on Cygwin, which I guess is a bit
> uncommon.

That's the official way of doing it!

> My command sequence is:
> 
>     < download and untar
> https://github.com/ocaml/ocaml/archive/4.03.0.tar.gz >
>     git clone https://github.com/alainfrisch/flexdll.git
>     cp config/m-nt.h config/m.h
>     cp config/s-nt.h config/s.h
>     cp config/Makefile.mingw64 config/Makefile
>     make -f Makefile.nt flexdll
>     make -f Makefile.nt world
>     make -f Makefile.nt opt
>     make -f Makefile.nt opt.opt
> 
> I already have a cygqin ocaml installed in the usual paths, I guess this
> leads to confusion. Probably I should give a PREFIX=something argument to
> make.

Indeed - it means you *do* have a system installation of flexdll! It almost certainly means IFLEXDIR is wrong (though I'm still surprised that you get -I../byterun from make -f Makefile.nt opt). Presumably that means which flexlink from your Cygwin prompt returns something like /usr/bin/flexlink?

> If you are interested, I can send you two scripts to setup a clean Cygwin
> and reproduce the issue, but I guess with the pointers you gave me, I
> should be able to figure it out myself.
> 
> Just two questions:
> 
> 1.) in your .comp files I saw a win32.sh. Where is this from? It doesn't
> appear in the 4.03.0 tar ball mentioned above.

I'm working on OPAM 2.0, so it's a package rather than a .comp file. win.sh is a helper script in that package, since embedding the commands for all four ports in a single OPAM file gets unreadable very quickly! 

> 2.) How far is the windows opam and what build environment do you use for
> this? Cygwin mingw cross? Should I give it a try?

I'm very nearly ready to do an alpha release, but I've been delayed by emergency eye surgery this week, which has severely limited the number of hours I can spend in front of a computer! The version I'm working supports OCaml 3.07-4.03 using all the native ports (32/64-bit msvc and mingw) built the official way using Cygwin.


David