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Re: Fwd: [Bug c++/14563] octave built under Cygwin very slow]

From: Andy Adler
Subject: Re: Fwd: [Bug c++/14563] octave built under Cygwin very slow]
Date: Sat, 6 Aug 2005 08:30:55 -0400 (EDT)

On Fri, 5 Aug 2005, James R. Phillips wrote:
> --- Paul Billings  wrote:
> > I have read as much as this thread as I can, including all the traffic on
> > the gcc bugzilla report. ...  Is the problem present in the currently
> > distributed octave executable in cygwin?
> There is bad news, and there is good news.  The good news is that octave on
> cygwin is currently built with gcc3.3, which doesn't have this bug.  The bad
> news is that this is done because the problems with building octave on cygwin
> with gcc3.4 are so severe that the build hangs before producing its first user
> prompt.
> I build octave on cygwin so I can use it myself, and it is pretty speedy,
> particularly if you install lapack source and build an optimized blas library.

Gcc3.3, as supplied by cygwin, uses SJLJ. Thus James' octave version
will have this issue.

I have two comments:
  - I'm also seeing the compile problems with gcc3.4; however Paul
    Soderlind sent me a note that he had no problem with gcc3.4.
    Would anyone else like to comment on their experiences with

  - Has anyone tried to compile octave with a gcc version compiled
    with --disable-sjlj-exceptions?

Andy Adler

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