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RE: MinGW build of octave

From: Paul Billings
Subject: RE: MinGW build of octave
Date: Thu, 11 Aug 2005 09:29:19 -1000


Forgive me for being a nOOb, buy why are you working so hard to get cygwin
going under mingw?  It can't be the sjlj-speed-issue since rebuilding
cygwin's gcc is easier.  I am sure I am missing something.


> -----Original Message-----
> From: David Bateman [mailto:address@hidden
> Sent: Thursday, August 11, 2005 6:05 AM
> To: octave maintainers mailing list
> Subject: MinGW build of octave
> Dear All,
> As I've mentioned on the lists I've been looking at a MinGW build of
> octave, and now have something that I think is good enough to share with
> others. You'll need to recover the two files from
> http://www.dbateman.org/octave, then follow the instructions below,
> adpated to your own preferences and existing setup.
> Reference [1] http://www.mingw.org/download.shtml
> * Download MinGW-4.1.0.exe and use it to install compilers (using 3.4.2
> personally)
> * Download MSYS-1.0.10.exe and install minimal environment (install in
> c:\msys)
> * Download msyDTK-1.0.1.exe and instal it for autoconf, etc (install in
> c:\msys)
> * Use the wget mingwPort package to install wget (Warning binary version
> of wget supplied with package seems broken, and so you must download the
> source of wget by hand at the same location)
> * Use zlib mingwPort package, which can be download since built version
> of wget works
> * Go to the www.activestate.com page and install msi version of
> ActivePerl (I'm not sure that this step is now necessary with msysDTK as
> msysDTK also has  perl, but haven't checked)
> * Use my own readline 5.0 mingwPort package to install readline
> libraries from
> http://www.dbateman.org/octave/readline-5.0-mingwPORT.tar.bz2
> * Get ftp://ftp.gnuplot.info/pub/gnuplot/gp400win32.zip and unzip
> under c:\
> * Now you can build octave
>   - Download version 2.9.3 or later of octave
>   - untar and apply supplied patch from
> http://www.dbateman.org/octave/patch-mingw-2.9.3.gz
>   - Use autogen.sh to rebuild configure, etc
>   - export PATH=$PATH:/c/gnuplot/bin
>   - configure --prefix=/mingw/octave-2.9
>   - make
>   - make install-strip
> * cmd.exe
> PATH=%PATH%;C:\MinGW\bin;C:\msys\bin;C:\MinGW\octave-2.9\bin;C:\gn
> uplot\bin
>   octave
> Note, don't use msys rxvt to launch octave.. The pty emulation in msys
> rxvt is seriously broken and readline will therefore not work correctly.
> Cygwin rxvt seems fine but implies that you must have cygwin installed,
> which kind of misses the point of a mingw build. So use cmd.exe by
> preference. I presume someone will want to write an IDE under windows in
> the long run in any case and so redirecting stdout/stdin from a console
> app will avoid this issue.
> Also note the fork issues with mingw were not an issue, perhaps due to
> the version of gcc I used having rmdir, mkdir and rename defined, and so
> liboctave/{rmdir.c,mkdir.c,rename.c} were ifdef'ed out.. However this
> means that Ffork won't work in the mingw build. The cost of including an
> implementation of fork basically means that all of the code in cygwin
> fork.cc needs to be included in octave (or probably mingw) this is also
> seems unlikely, so Ffork will probably never be implemented in mingw.
> I'm not completely happy with the patch yet as it has one remaining
> issue in that ctrl-c at the prompt is not working correctly (though is
> elsewhere). Note that I also had to reinclude the glob directory in
> octave as this is missing in the mingw/msys stuff. Problems that I know
> I have fixed include
> - readline works in cmd.exe
> - ctrl-c works except at the prompt (take Paul Kienzle for the help)
> - Loadable modules (ie octfiles)
> - Path seperator issues that were preventing octave finding its scripts.
> Path seperator is now ";" under mingw rather than ":" elsewhere.
> - a problem with popen's use in help (ie passed /dev/null) that prevent
> texinfo help from working
> - install issues due to the lack of ln that was preventing a full
> install, in particular of the libraries and oct-files
> - Saving of .octave_hist file now happens in %HOMEPATH% if %HOME% isn't
> defined, same for .octaverc
> - Some issues of \r\n in the documentation fixed-up (is this completely
> resolved? Do we care if the docs are already build.. WARNING 2.9.3 has
> some timestamps of some *.txi that force rebuild!!)
> I haven't extensively tested the patch, but I did test the script in the
> g++ sjlj/dwarf2 bug report that is causing the speed issues before
> embarking on this effort and demonstrated that a mingw build did no have
> the speed issues. So I expect this build of octave to be significantly
> faster than the cygwin builds. As this stuff will take a while to
> finalize I'm also working against 2.9.3 (note not the CVS, but will
> upgrade at next 2.9 release), and have no intention of porting this to
> the 2.1.x tree.
> Next steps include fixing the ctrl-c issue at the prompt, and starting
> to port such libraries as fftw, atlas, gplk, hdf5, umfpack, etc for use
> by octave. Finally building the relevant stuff from octave-forge and
> their support libraries, should also be done. Once that is done we can
> look at using the NSIS installer that Paul has been working on in
> octave-forge to build a simple install for windows users. If anyone
> wants to try this stuff out, I'd love to get some feedback.
> Regards
> David
> --
> David Bateman                                address@hidden
> Motorola Labs - Paris                        +33 1 69 35 48 04 (Ph)
> Parc Les Algorithmes, Commune de St Aubin    +33 1 69 35 77 01 (Fax)
> 91193 Gif-Sur-Yvette FRANCE
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